Make an internal diagnostic for bad CCL map
[pazpar2-moved-to-github.git] / src / session.c
index f1f742a..e2eda61 100644 (file)
@@ -1,5 +1,5 @@
 /* This file is part of Pazpar2.
-   Copyright (C) 2006-2011 Index Data
+   Copyright (C) 2006-2012 Index Data
 
 Pazpar2 is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free
@@ -76,17 +76,18 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 #include "settings.h"
 #include "normalize7bit.h"
 
-#define TERMLIST_HIGH_SCORE 25
+#include <libxml/tree.h>
 
 #define MAX_CHUNK 15
 
 #define MAX(a,b) ((a)>(b)?(a):(b))
 
 // Note: Some things in this structure will eventually move to configuration
-struct parameters global_parameters = 
+struct parameters global_parameters =
 {
     0,   // dump_records
-    0    // debug_mode
+    0,   // debug_mode
+    0,   // predictable sessions
 };
 
 struct client_list {
@@ -97,6 +98,7 @@ struct client_list {
 /* session counting (1) , disable client counting (0) */
 static YAZ_MUTEX g_session_mutex = 0;
 static int no_sessions = 0;
+static int no_session_total = 0;
 
 static int session_use(int delta)
 {
@@ -105,16 +107,30 @@ static int session_use(int delta)
         yaz_mutex_create(&g_session_mutex);
     yaz_mutex_enter(g_session_mutex);
     no_sessions += delta;
+    if (delta > 0)
+        no_session_total += delta;
     sessions = no_sessions;
     yaz_mutex_leave(g_session_mutex);
-    yaz_log(YLOG_DEBUG, "%s sesions=%d", delta == 0 ? "" : (delta > 0 ? "INC" : "DEC"), no_sessions);
+    yaz_log(YLOG_DEBUG, "%s sessions=%d", delta == 0 ? "" : (delta > 0 ? "INC" : "DEC"), no_sessions);
     return sessions;
 }
 
-int sessions_count(void) {
+int sessions_count(void)
+{
     return session_use(0);
 }
 
+int session_count_total(void)
+{
+    int total = 0;
+    if (!g_session_mutex)
+        return 0;
+    yaz_mutex_enter(g_session_mutex);
+    total = no_session_total;
+    yaz_mutex_leave(g_session_mutex);
+    return total;
+}
+
 static void log_xml_doc(xmlDoc *doc)
 {
     FILE *lf = yaz_log_file();
@@ -143,53 +159,59 @@ static void session_leave(struct session *s)
     yaz_mutex_leave(s->session_mutex);
 }
 
-// Recursively traverse query structure to extract terms.
-void pull_terms(NMEM nmem, struct ccl_rpn_node *n, char **termlist, int *num)
+static void session_normalize_facet(struct session *s, const char *type,
+                                    const char *value,
+                                    WRBUF display_wrbuf,
+                                    WRBUF facet_wrbuf)
 {
-    char **words;
-    int numwords;
+    struct conf_service *service = s->service;
+    pp2_charset_token_t prt;
+    const char *facet_component;
     int i;
+    const char *icu_chain_id = 0;
 
-    switch (n->kind)
+    for (i = 0; i < service->num_metadata; i++)
+        if (!strcmp((service->metadata + i)->name, type))
+            icu_chain_id = (service->metadata + i)->facetrule;
+    if (!icu_chain_id)
+        icu_chain_id = "facet";
+    prt = pp2_charset_token_create(service->charsets, icu_chain_id);
+    if (!prt)
     {
-    case CCL_RPN_AND:
-    case CCL_RPN_OR:
-    case CCL_RPN_NOT:
-    case CCL_RPN_PROX:
-        pull_terms(nmem, n->u.p[0], termlist, num);
-        pull_terms(nmem, n->u.p[1], termlist, num);
-        break;
-    case CCL_RPN_TERM:
-        nmem_strsplit(nmem, " ", n->u.t.term, &words, &numwords);
-        for (i = 0; i < numwords; i++)
-            termlist[(*num)++] = words[i];
-        break;
-    default: // NOOP
-        break;
+        yaz_log(YLOG_FATAL, "Unknown ICU chain '%s' for facet of type '%s'",
+                icu_chain_id, type);
+        wrbuf_destroy(facet_wrbuf);
+        wrbuf_destroy(display_wrbuf);
+        return;
     }
-}
-
-
-void add_facet(struct session *s, const char *type, const char *value, int count)
-{
-    struct conf_service *service = s->service;
-    pp2_relevance_token_t prt;
-    const char *facet_component;
-    WRBUF facet_wrbuf = wrbuf_alloc();
-    prt = pp2_relevance_tokenize(service->facet_pct);
-    
-    pp2_relevance_first(prt, value, 0);
-    while ((facet_component = pp2_relevance_token_next(prt)))
+    pp2_charset_token_first(prt, value, 0);
+    while ((facet_component = pp2_charset_token_next(prt)))
     {
+        const char *display_component;
         if (*facet_component)
         {
             if (wrbuf_len(facet_wrbuf))
                 wrbuf_puts(facet_wrbuf, " ");
             wrbuf_puts(facet_wrbuf, facet_component);
         }
+        display_component = pp2_get_display(prt);
+        if (display_component)
+        {
+            if (wrbuf_len(display_wrbuf))
+                wrbuf_puts(display_wrbuf, " ");
+            wrbuf_puts(display_wrbuf, display_component);
+        }
     }
-    pp2_relevance_token_destroy(prt);
-    
+    pp2_charset_token_destroy(prt);
+}
+
+void add_facet(struct session *s, const char *type, const char *value, int count)
+{
+    WRBUF facet_wrbuf = wrbuf_alloc();
+    WRBUF display_wrbuf = wrbuf_alloc();
+
+    session_normalize_facet(s, type, value, display_wrbuf, facet_wrbuf);
+
     if (wrbuf_len(facet_wrbuf))
     {
         int i;
@@ -202,22 +224,23 @@ void add_facet(struct session *s, const char *type, const char *value, int count
             {
                 session_log(s, YLOG_FATAL, "Too many termlists");
                 wrbuf_destroy(facet_wrbuf);
+                wrbuf_destroy(display_wrbuf);
                 return;
             }
-            
+
             s->termlists[i].name = nmem_strdup(s->nmem, type);
-            s->termlists[i].termlist 
-                = termlist_create(s->nmem, TERMLIST_HIGH_SCORE);
+            s->termlists[i].termlist = termlist_create(s->nmem);
             s->num_termlists = i + 1;
         }
-        
-#if
-        session_log(s, YLOG_DEBUG, "Facets for %s: %s norm:%s (%d)", type, value, wrbuf_cstr(facet_wrbuf), count);
+
+#if 0
+        session_log(s, YLOG_LOG, "Facets for %s: %s norm:%s (%d)", type, value, wrbuf_cstr(facet_wrbuf), count);
 #endif
-        termlist_insert(s->termlists[i].termlist, wrbuf_cstr(facet_wrbuf),
-                        count);
+        termlist_insert(s->termlists[i].termlist, wrbuf_cstr(display_wrbuf),
+                        wrbuf_cstr(facet_wrbuf), count);
     }
     wrbuf_destroy(facet_wrbuf);
+    wrbuf_destroy(display_wrbuf);
 }
 
 static xmlDoc *record_to_xml(struct session *se,
@@ -231,13 +254,13 @@ static xmlDoc *record_to_xml(struct session *se,
     if (!rdoc)
     {
         session_log(se, YLOG_FATAL, "Non-wellformed XML received from %s",
-                    db->url);
+                    db->id);
         return 0;
     }
 
     if (global_parameters.dump_records)
     {
-        session_log(se, YLOG_LOG, "Un-normalized record from %s", db->url);
+        session_log(se, YLOG_LOG, "Un-normalized record from %s", db->id);
         log_xml_doc(rdoc);
     }
 
@@ -319,22 +342,22 @@ static xmlDoc *normalize_record(struct session *se,
     if (rdoc)
     {
         char *parms[MAX_XSLT_ARGS*2+1];
-        
+
         insert_settings_parameters(sdb, service, parms, nmem);
-        
+
         if (normalize_record_transform(sdb->map, &rdoc, (const char **)parms))
         {
             session_log(se, YLOG_WARN, "Normalize failed from %s",
-                        sdb->database->url);
+                        sdb->database->id);
         }
         else
         {
             insert_settings_values(sdb, rdoc, service);
-            
+
             if (global_parameters.dump_records)
             {
-                session_log(se, YLOG_LOG, "Normalized record from %s", 
-                            sdb->database->url);
+                session_log(se, YLOG_LOG, "Normalized record from %s",
+                            sdb->database->id);
                 log_xml_doc(rdoc);
             }
         }
@@ -382,63 +405,43 @@ const char *session_setting_oneval(struct session_database *db, int offset)
 // setting. However, this is not a realistic use scenario.
 static int prepare_map(struct session *se, struct session_database *sdb)
 {
-    const char *s;
-
-    if (!sdb->settings)
+    if (sdb->settings && !sdb->map)
     {
-        session_log(se, YLOG_WARN, "No settings on %s", sdb->database->url);
-        return -1;
-    }
-    if ((s = session_setting_oneval(sdb, PZ_XSLT)))
-    {
-        char auto_stylesheet[256];
+        const char *s;
 
-        if (!strcmp(s, "auto"))
+        if (sdb->settings[PZ_XSLT] &&
+            (s = session_setting_oneval(sdb, PZ_XSLT)))
         {
-            const char *request_syntax = session_setting_oneval(
-                sdb, PZ_REQUESTSYNTAX);
-            if (request_syntax)
+            char auto_stylesheet[256];
+
+            if (!strcmp(s, "auto"))
             {
-                char *cp;
-                yaz_snprintf(auto_stylesheet, sizeof(auto_stylesheet),
-                             "%s.xsl", request_syntax);
-                for (cp = auto_stylesheet; *cp; cp++)
+                const char *request_syntax = session_setting_oneval(
+                    sdb, PZ_REQUESTSYNTAX);
+                if (request_syntax)
+                {
+                    char *cp;
+                    yaz_snprintf(auto_stylesheet, sizeof(auto_stylesheet),
+                                 "%s.xsl", request_syntax);
+                    for (cp = auto_stylesheet; *cp; cp++)
+                    {
+                        /* deliberately only consider ASCII */
+                        if (*cp > 32 && *cp < 127)
+                            *cp = tolower(*cp);
+                    }
+                    s = auto_stylesheet;
+                }
+                else
                 {
-                    /* deliberately only consider ASCII */
-                    if (*cp > 32 && *cp < 127)
-                        *cp = tolower(*cp);
+                    session_log(se, YLOG_WARN,
+                                "No pz:requestsyntax for auto stylesheet");
                 }
-                s = auto_stylesheet;
-            }
-            else
-            {
-                session_log(se, YLOG_WARN,
-                            "No pz:requestsyntax for auto stylesheet");
             }
+            sdb->map = normalize_cache_get(se->normalize_cache,
+                                           se->service, s);
+            if (!sdb->map)
+                return -1;
         }
-        sdb->map = normalize_cache_get(se->normalize_cache,
-                                       se->service->server->config, s);
-        if (!sdb->map)
-            return -1;
-    }
-    return 0;
-}
-
-// This analyzes settings and recomputes any supporting data structures
-// if necessary.
-static int prepare_session_database(struct session *se, 
-                                    struct session_database *sdb)
-{
-    if (!sdb->settings)
-    {
-        session_log(se, YLOG_WARN, 
-                "No settings associated with %s", sdb->database->url);
-        return -1;
-    }
-    if (sdb->settings[PZ_XSLT] && !sdb->map)
-    {
-        if (prepare_map(se, sdb) < 0)
-            return -1;
     }
     return 0;
 }
@@ -455,7 +458,7 @@ static void session_watch_cancel(void *data, struct http_channel *c,
 }
 
 // set watch. Returns 0=OK, -1 if watch is already set
-int session_set_watch(struct session *s, int what, 
+int session_set_watch(struct session *s, int what,
                       session_watchfun fun, void *data,
                       struct http_channel *chan)
 {
@@ -465,7 +468,7 @@ int session_set_watch(struct session *s, int what,
         ret = -1;
     else
     {
-        
+
         s->watchlist[what].fun = fun;
         s->watchlist[what].data = data;
         s->watchlist[what].obs = http_add_observer(chan, &s->watchlist[what],
@@ -473,7 +476,7 @@ int session_set_watch(struct session *s, int what,
         ret = 0;
     }
     session_leave(s);
-    return 0;
+    return ret;
 }
 
 void session_alert_watch(struct session *s, int what)
@@ -506,28 +509,69 @@ void session_alert_watch(struct session *s, int what)
 }
 
 //callback for grep_databases
-static void select_targets_callback(void *context, struct session_database *db)
+static void select_targets_callback(struct session *se,
+                                    struct session_database *db)
 {
-    struct session *se = (struct session*) context;
-    struct client *cl = client_create();
+    struct client *cl;
     struct client_list *l;
-    client_set_database(cl, db);
 
+    for (l = se->clients_cached; l; l = l->next)
+        if (client_get_database(l->client) == db)
+            break;
+
+    if (l)
+        cl = l->client;
+    else
+    {
+        cl = client_create(db->database->id);
+        client_set_database(cl, db);
+
+        l = xmalloc(sizeof(*l));
+        l->client = cl;
+        l->next = se->clients_cached;
+        se->clients_cached = l;
+    }
+    /* set session always. If may be 0 if client is not active */
     client_set_session(cl, se);
 
     l = xmalloc(sizeof(*l));
     l->client = cl;
-    l->next = se->clients;
-    se->clients = l;
+    l->next = se->clients_active;
+    se->clients_active = l;
+}
+
+static void session_reset_active_clients(struct session *se,
+                                         struct client_list *new_list)
+{
+    struct client_list *l;
+
+    session_enter(se);
+    l = se->clients_active;
+    se->clients_active = new_list;
+    session_leave(se);
+
+    while (l)
+    {
+        struct client_list *l_next = l->next;
+
+        client_lock(l->client);
+        client_set_session(l->client, 0); /* mark client inactive */
+        client_unlock(l->client);
+
+        xfree(l);
+        l = l_next;
+    }
 }
 
-static void session_remove_clients(struct session *se)
+static void session_remove_cached_clients(struct session *se)
 {
     struct client_list *l;
 
+    session_reset_active_clients(se, 0);
+
     session_enter(se);
-    l = se->clients;
-    se->clients = 0;
+    l = se->clients_cached;
+    se->clients_cached = 0;
     session_leave(se);
 
     while (l)
@@ -544,7 +588,7 @@ static void session_remove_clients(struct session *se)
 }
 
 // Associates a set of clients with a session;
-// Note: Session-databases represent databases with per-session 
+// Note: Session-databases represent databases with per-session
 // setting overrides
 static int select_targets(struct session *se, const char *filter)
 {
@@ -556,7 +600,7 @@ int session_active_clients(struct session *s)
     struct client_list *l;
     int res = 0;
 
-    for (l = s->clients; l; l = l->next)
+    for (l = s->clients_active; l; l = l->next)
         if (client_is_active(l->client))
             res++;
 
@@ -568,85 +612,199 @@ int session_is_preferred_clients_ready(struct session *s)
     struct client_list *l;
     int res = 0;
 
-    for (l = s->clients; l; l = l->next)
+    for (l = s->clients_active; l; l = l->next)
         if (client_is_active_preferred(l->client))
             res++;
     session_log(s, YLOG_DEBUG, "Has %d active preferred clients.", res);
     return res == 0;
 }
 
+static void session_clear_set(struct session *se,
+                              const char *sort_field, int increasing, int position)
+{
+    reclist_destroy(se->reclist);
+    se->reclist = 0;
+    if (nmem_total(se->nmem))
+        session_log(se, YLOG_DEBUG, "NMEN operation usage %zd",
+                    nmem_total(se->nmem));
+    nmem_reset(se->nmem);
+    se->total_records = se->total_merged = 0;
+    se->num_termlists = 0;
+
+    /* reset list of sorted results and clear to relevance search */
+    se->sorted_results = nmem_malloc(se->nmem, sizeof(*se->sorted_results));
+    se->sorted_results->field = nmem_strdup(se->nmem, sort_field);
+    se->sorted_results->increasing = increasing;
+    se->sorted_results->position = position;
+    se->sorted_results->next = 0;
+
+    session_log(se, YLOG_DEBUG, "clear_set session_sort: field=%s increasing=%d position=%d configured",
+                sort_field, increasing, position);
+
+    se->reclist = reclist_create(se->nmem);
+}
+
+void session_sort(struct session *se, const char *field, int increasing,
+                  int position)
+{
+    struct session_sorted_results *sr;
+    struct client_list *l;
+
+    session_enter(se);
+
+    yaz_log(YLOG_LOG, "session_sort field=%s increasing=%d position=%d", field, increasing, position);
+    /* see if we already have sorted for this critieria */
+    for (sr = se->sorted_results; sr; sr = sr->next)
+    {
+        if (!strcmp(field, sr->field) && increasing == sr->increasing && sr->position == position)
+            break;
+    }
+    if (sr)
+    {
+        session_log(se, YLOG_DEBUG, "search_sort: field=%s increasing=%d position=%d already fetched",
+                    field, increasing, position);
+        session_leave(se);
+        return;
+    }
+    session_log(se, YLOG_DEBUG, "search_sort: field=%s increasing=%d position=%d must fetch",
+                field, increasing, position);
+    if (position)
+    {
+        yaz_log(YLOG_DEBUG, "Reset results due to position");
+        session_clear_set(se, field, increasing, position);
+    }
+    else {
+        sr = nmem_malloc(se->nmem, sizeof(*sr));
+        sr->field = nmem_strdup(se->nmem, field);
+        sr->increasing = increasing;
+        sr->position = position;
+        sr->next = se->sorted_results;
+        se->sorted_results = sr;
+    }
+    yaz_log(YLOG_DEBUG, "Restarting search for clients due to change in sort order");
 
+    for (l = se->clients_active; l; l = l->next)
+    {
+        struct client *cl = l->client;
+        if (client_get_state(cl) == Client_Connecting ||
+            client_get_state(cl) == Client_Idle ||
+            client_get_state(cl) == Client_Working) {
+            yaz_log(YLOG_DEBUG, "Client %s: Restarting search due to change in sort order", client_get_id(cl));
+            client_start_search(cl);
+        }
+    }
+    session_leave(se);
+}
 
-enum pazpar2_error_code search(struct session *se,
-                               const char *query,
-                               const char *startrecs, const char *maxrecs,
-                               const char *filter,
-                               const char **addinfo)
+enum pazpar2_error_code session_search(struct session *se,
+                                       const char *query,
+                                       const char *startrecs,
+                                       const char *maxrecs,
+                                       const char *filter,
+                                       const char *limit,
+                                       const char **addinfo,
+                                       struct reclist_sortparms *sp)
 {
     int live_channels = 0;
     int no_working = 0;
-    int no_failed = 0;
-    struct client_list *l;
+    int no_failed_query = 0;
+    int no_failed_limit = 0;
+    struct client_list *l, *l0;
     struct timeval tval;
+    facet_limits_t facet_limits;
 
     session_log(se, YLOG_DEBUG, "Search");
 
     *addinfo = 0;
 
-    session_remove_clients(se);
-    
+    if (se->settings_modified)
+        session_remove_cached_clients(se);
+    else
+        session_reset_active_clients(se, 0);
+
     session_enter(se);
-    reclist_destroy(se->reclist);
-    se->reclist = 0;
+    se->settings_modified = 0;
+    session_clear_set(se, sp->name, sp->increasing, sp->type == Metadata_sortkey_position);
     relevance_destroy(&se->relevance);
-    nmem_reset(se->nmem);
-    se->total_records = se->total_hits = se->total_merged = 0;
-    se->num_termlists = 0;
+
     live_channels = select_targets(se, filter);
     if (!live_channels)
     {
         session_leave(se);
         return PAZPAR2_NO_TARGETS;
     }
-    se->reclist = reclist_create(se->nmem);
 
     yaz_gettimeofday(&tval);
-    
+
     tval.tv_sec += 5;
 
-    for (l = se->clients; l; l = l->next)
+    facet_limits = facet_limits_create(limit);
+    if (!facet_limits)
     {
+        *addinfo = "limit";
+        session_leave(se);
+        return PAZPAR2_MALFORMED_PARAMETER_VALUE;
+    }
+
+    l0 = se->clients_active;
+    se->clients_active = 0;
+    session_leave(se);
+
+    for (l = l0; l; l = l->next)
+    {
+        int parse_ret;
         struct client *cl = l->client;
 
-        if (maxrecs)
-            client_set_maxrecs(cl, atoi(maxrecs));
-        if (startrecs)
-            client_set_startrecs(cl, atoi(startrecs));
-        if (prepare_session_database(se, client_get_database(cl)) < 0)
-            ;
-        else if (client_parse_query(cl, query) < 0)
-            no_failed++;
+        if (prepare_map(se, client_get_database(cl)) < 0)
+            continue;
+
+        parse_ret = client_parse_query(cl, query, facet_limits, startrecs,
+                                       maxrecs, se->service->ccl_bibset);
+        if (parse_ret == -1)
+            no_failed_query++;
+        else if (parse_ret == -2)
+            no_failed_limit++;
+        else if (parse_ret)
+            no_working++; /* other error, such as bad CCL map */
         else
         {
-            no_working++;
-            if (client_prep_connection(cl, se->service->z3950_operation_timeout,
+            int r =
+                client_prep_connection(cl, se->service->z3950_operation_timeout,
                                        se->service->z3950_session_timeout,
                                        se->service->server->iochan_man,
-                                       &tval))
+                                       &tval);
+            if (parse_ret == 1 && r == 2)
+            {
+                session_log(se, YLOG_LOG, "client %s REUSE result", client_get_id(cl));
+                client_reingest(cl);
+            }
+            else if (r)
+            {
+                session_log(se, YLOG_LOG, "client %s NEW search", client_get_id(cl));
                 client_start_search(cl);
+            }
+            no_working++;
         }
     }
-    session_leave(se);
+    facet_limits_destroy(facet_limits);
+    session_reset_active_clients(se, l0);
+
     if (no_working == 0)
     {
-        if (no_failed > 0)
+        if (no_failed_query > 0)
         {
             *addinfo = "query";
             return PAZPAR2_MALFORMED_PARAMETER_VALUE;
         }
+        else if (no_failed_limit > 0)
+        {
+            *addinfo = "limit";
+            return PAZPAR2_MALFORMED_PARAMETER_VALUE;
+        }
         else
             return PAZPAR2_NO_TARGETS;
     }
+    session_log(se, YLOG_LOG, "session_start_search done");
     return PAZPAR2_NO_ERROR;
 }
 
@@ -658,7 +816,7 @@ static void session_init_databases_fun(void *context, struct database *db)
     int i;
 
     new->database = db;
-    
+
     new->map = 0;
     assert(db->settings);
     new->settings = nmem_malloc(se->session_nmem,
@@ -689,13 +847,10 @@ void session_init_databases(struct session *se)
 
 // Probably session_init_databases_fun should be refactored instead of
 // called here.
-static struct session_database *load_session_database(struct session *se, 
+static struct session_database *load_session_database(struct session *se,
                                                       char *id)
 {
-    struct database *db = new_database(id, se->session_nmem);
-
-    resolve_database(se->service, db);
-
+    struct database *db = new_database_inherit_settings(id, se->session_nmem, se->service->settings);
     session_init_databases_fun((void*) se, db);
 
     // New sdb is head of se->databases list
@@ -703,13 +858,13 @@ static struct session_database *load_session_database(struct session *se,
 }
 
 // Find an existing session database. If not found, load it
-static struct session_database *find_session_database(struct session *se, 
+static struct session_database *find_session_database(struct session *se,
                                                       char *id)
 {
     struct session_database *sdb;
 
     for (sdb = se->databases; sdb; sdb = sdb->next)
-        if (!strcmp(sdb->database->url, id))
+        if (!strcmp(sdb->database->id, id))
             return sdb;
     return load_session_database(se, id);
 }
@@ -732,6 +887,8 @@ void session_apply_setting(struct session *se, char *dbname, char *setting,
     new->next = sdb->settings[offset];
     sdb->settings[offset] = new;
 
+    se->settings_modified = 1;
+
     // Force later recompute of settings-driven data structures
     // (happens when a search starts and client connections are prepared)
     switch (offset)
@@ -745,22 +902,25 @@ void session_apply_setting(struct session *se, char *dbname, char *setting,
     }
 }
 
-void destroy_session(struct session *se)
+void session_destroy(struct session *se)
 {
     struct session_database *sdb;
     session_log(se, YLOG_DEBUG, "Destroying");
     session_use(-1);
-    session_remove_clients(se);
+    session_remove_cached_clients(se);
 
     for (sdb = se->databases; sdb; sdb = sdb->next)
         session_database_destroy(sdb);
     normalize_cache_destroy(se->normalize_cache);
     relevance_destroy(&se->relevance);
     reclist_destroy(se->reclist);
+    if (nmem_total(se->nmem))
+        session_log(se, YLOG_DEBUG, "NMEN operation usage %zd", nmem_total(se->nmem));
+    if (nmem_total(se->session_nmem))
+        session_log(se, YLOG_DEBUG, "NMEN session usage %zd", nmem_total(se->session_nmem));
     nmem_destroy(se->nmem);
     service_destroy(se->service);
     yaz_mutex_destroy(&se->session_mutex);
-    wrbuf_destroy(se->wrbuf);
 }
 
 size_t session_get_memory_status(struct session *session) {
@@ -788,16 +948,16 @@ struct session *new_session(NMEM nmem, struct conf_service *service,
     session_log(session, YLOG_DEBUG, "New");
     session->service = service;
     session->relevance = 0;
-    session->total_hits = 0;
     session->total_records = 0;
     session->number_of_warnings_unknown_elements = 0;
     session->number_of_warnings_unknown_metadata = 0;
     session->num_termlists = 0;
     session->reclist = 0;
-    session->clients = 0;
+    session->clients_active = 0;
+    session->clients_cached = 0;
+    session->settings_modified = 0;
     session->session_nmem = nmem;
     session->nmem = nmem_create();
-    session->wrbuf = wrbuf_alloc();
     session->databases = 0;
     for (i = 0; i <= SESSION_WATCH_MAX; i++)
     {
@@ -811,54 +971,201 @@ struct session *new_session(NMEM nmem, struct conf_service *service,
     return session;
 }
 
-struct hitsbytarget *hitsbytarget(struct session *se, int *count, NMEM nmem)
+const char * client_get_suggestions_xml(struct client *cl, WRBUF wrbuf);
+
+static struct hitsbytarget *hitsbytarget_nb(struct session *se,
+                                            int *count, NMEM nmem)
 {
     struct hitsbytarget *res = 0;
     struct client_list *l;
     size_t sz = 0;
 
-    session_enter(se);
-    for (l = se->clients; l; l = l->next)
+    for (l = se->clients_active; l; l = l->next)
         sz++;
 
     res = nmem_malloc(nmem, sizeof(*res) * sz);
     *count = 0;
-    for (l = se->clients; l; l = l->next)
+    for (l = se->clients_active; l; l = l->next)
     {
         struct client *cl = l->client;
         WRBUF w = wrbuf_alloc();
         const char *name = session_setting_oneval(client_get_database(cl),
                                                   PZ_NAME);
 
-        res[*count].id = client_get_database(cl)->database->url;
+        res[*count].id = client_get_id(cl);
         res[*count].name = *name ? name : "Unknown";
         res[*count].hits = client_get_hits(cl);
+        res[*count].approximation = client_get_approximation(cl);
         res[*count].records = client_get_num_records(cl);
-        res[*count].diagnostic = client_get_diagnostic(cl);
+        res[*count].filtered = client_get_num_records_filtered(cl);
+        res[*count].diagnostic =
+            client_get_diagnostic(cl, &res[*count].addinfo);
         res[*count].state = client_get_state_str(cl);
         res[*count].connected  = client_get_connection(cl) ? 1 : 0;
         session_settings_dump(se, client_get_database(cl), w);
-        res[*count].settings_xml = w;
+        res[*count].settings_xml = nmem_strdup(nmem, wrbuf_cstr(w));
+        wrbuf_rewind(w);
+        wrbuf_puts(w, "");
+        res[*count].suggestions_xml = nmem_strdup(nmem, client_get_suggestions_xml(cl, w));
+        wrbuf_destroy(w);
         (*count)++;
     }
-    session_leave(se);
     return res;
 }
 
-struct termlist_score **termlist(struct session *se, const char *name, int *num)
+struct hitsbytarget *get_hitsbytarget(struct session *se, int *count, NMEM nmem)
 {
-    int i;
-    struct termlist_score **tl = 0;
+    struct hitsbytarget *p;
+    session_enter(se);
+    p = hitsbytarget_nb(se, count, nmem);
+    session_leave(se);
+    return p;
+}
+
+// Compares two hitsbytarget nodes by hitcount
+static int cmp_ht(const void *p1, const void *p2)
+{
+    const struct hitsbytarget *h1 = p1;
+    const struct hitsbytarget *h2 = p2;
+    return h2->hits - h1->hits;
+}
+
+// Compares two hitsbytarget nodes by hitcount
+static int cmp_ht_approx(const void *p1, const void *p2)
+{
+    const struct hitsbytarget *h1 = p1;
+    const struct hitsbytarget *h2 = p2;
+    return h2->approximation - h1->approximation;
+}
+
+static int targets_termlist_nb(WRBUF wrbuf, struct session *se, int num,
+                               NMEM nmem, int version)
+{
+    struct hitsbytarget *ht;
+    int count, i;
+
+    ht = hitsbytarget_nb(se, &count, nmem);
+    if (version >= 2)
+        qsort(ht, count, sizeof(struct hitsbytarget), cmp_ht_approx);
+    else
+        qsort(ht, count, sizeof(struct hitsbytarget), cmp_ht);
+    for (i = 0; i < count && i < num && ht[i].hits > 0; i++)
+    {
+
+        // do only print terms which have display names
+
+        wrbuf_puts(wrbuf, "<term>\n");
+
+        wrbuf_puts(wrbuf, "<id>");
+        wrbuf_xmlputs(wrbuf, ht[i].id);
+        wrbuf_puts(wrbuf, "</id>\n");
+
+        wrbuf_puts(wrbuf, "<name>");
+        if (!ht[i].name || !ht[i].name[0])
+            wrbuf_xmlputs(wrbuf, "NO TARGET NAME");
+        else
+            wrbuf_xmlputs(wrbuf, ht[i].name);
+        wrbuf_puts(wrbuf, "</name>\n");
+
+        wrbuf_printf(wrbuf, "<frequency>" ODR_INT_PRINTF "</frequency>\n",
+                     ht[i].hits);
+
+        if (version >= 2) {
+            // Should not print if we know it isn't a approximation.
+            wrbuf_printf(wrbuf, "<approximation>" ODR_INT_PRINTF "</approximation>\n", ht[i].approximation);
+            wrbuf_printf(wrbuf, "<records>%d</records>\n", ht[i].records - ht[i].filtered);
+            wrbuf_printf(wrbuf, "<filtered>%d</filtered>\n", ht[i].filtered);
+        }
+
+        wrbuf_puts(wrbuf, "<state>");
+        wrbuf_xmlputs(wrbuf, ht[i].state);
+        wrbuf_puts(wrbuf, "</state>\n");
+
+        wrbuf_printf(wrbuf, "<diagnostic>%d</diagnostic>\n",
+                     ht[i].diagnostic);
+        wrbuf_puts(wrbuf, "</term>\n");
+    }
+    return count;
+}
+
+void perform_termlist(struct http_channel *c, struct session *se,
+                      const char *name, int num, int version)
+{
+    int i, j;
+    NMEM nmem_tmp = nmem_create();
+    char **names;
+    int num_names = 0;
+
+    if (!name)
+        name = "*";
+
+    nmem_strsplit(nmem_tmp, ",", name, &names, &num_names);
 
     session_enter(se);
-    for (i = 0; i < se->num_termlists; i++)
-        if (!strcmp((const char *) se->termlists[i].name, name))
+
+    for (j = 0; j < num_names; j++)
+    {
+        const char *tname;
+        int must_generate_empty = 1; /* bug 5350 */
+
+        for (i = 0; i < se->num_termlists; i++)
         {
-            tl = termlist_highscore(se->termlists[i].termlist, num);
-            break;
+            tname = se->termlists[i].name;
+            if (!strcmp(names[j], tname) || !strcmp(names[j], "*"))
+            {
+                struct termlist_score **p = 0;
+                int len;
+
+                wrbuf_puts(c->wrbuf, "<list name=\"");
+                wrbuf_xmlputs(c->wrbuf, tname);
+                wrbuf_puts(c->wrbuf, "\">\n");
+                must_generate_empty = 0;
+
+                p = termlist_highscore(se->termlists[i].termlist, &len,
+                                       nmem_tmp);
+                if (p)
+                {
+                    int i;
+                    for (i = 0; i < len && i < num; i++)
+                    {
+                        // prevent sending empty term elements
+                        if (!p[i]->display_term || !p[i]->display_term[0])
+                            continue;
+
+                        wrbuf_puts(c->wrbuf, "<term>");
+                        wrbuf_puts(c->wrbuf, "<name>");
+                        wrbuf_xmlputs(c->wrbuf, p[i]->display_term);
+                        wrbuf_puts(c->wrbuf, "</name>");
+
+                        wrbuf_printf(c->wrbuf,
+                                     "<frequency>%d</frequency>",
+                                     p[i]->frequency);
+                        wrbuf_puts(c->wrbuf, "</term>\n");
+                    }
+                }
+                wrbuf_puts(c->wrbuf, "</list>\n");
+            }
+        }
+        tname = "xtargets";
+        if (!strcmp(names[j], tname) || !strcmp(names[j], "*"))
+        {
+            wrbuf_puts(c->wrbuf, "<list name=\"");
+            wrbuf_xmlputs(c->wrbuf, tname);
+            wrbuf_puts(c->wrbuf, "\">\n");
+
+            targets_termlist_nb(c->wrbuf, se, num, c->nmem, version);
+            wrbuf_puts(c->wrbuf, "</list>\n");
+            must_generate_empty = 0;
+        }
+        if (must_generate_empty)
+        {
+            wrbuf_puts(c->wrbuf, "<list name=\"");
+            wrbuf_xmlputs(c->wrbuf, names[j]);
+            wrbuf_puts(c->wrbuf, "\"/>\n");
         }
+    }
     session_leave(se);
-    return tl;
+    nmem_destroy(nmem_tmp);
 }
 
 #ifdef MISSING_HEADERS
@@ -869,7 +1176,7 @@ void report_nmem_stats(void)
     nmem_get_memory_in_use(&in_use);
     nmem_get_memory_free(&is_free);
 
-    yaz_log(YLOG_LOG, "nmem stat: use=%ld free=%ld", 
+    yaz_log(YLOG_LOG, "nmem stat: use=%ld free=%ld",
             (long) in_use, (long) is_free);
 }
 #endif
@@ -908,13 +1215,13 @@ void show_single_stop(struct session *se, struct record_cluster *rec)
 }
 
 struct record_cluster **show_range_start(struct session *se,
-                                         struct reclist_sortparms *sp, 
-                                         int start, int *num, int *total, Odr_int *sumhits)
+                                         struct reclist_sortparms *sp,
+                                         int start, int *num, int *total, Odr_int *sumhits, Odr_int *approx_hits)
 {
     struct record_cluster **recs;
     struct reclist_sortparms *spp;
     int i;
-#if USE_TIMING    
+#if USE_TIMING
     yaz_timing_t t = yaz_timing_create();
 #endif
     session_enter(se);
@@ -924,10 +1231,13 @@ struct record_cluster **show_range_start(struct session *se,
         *num = 0;
         *total = 0;
         *sumhits = 0;
+        *approx_hits = 0;
         recs = 0;
     }
     else
     {
+        struct client_list *l;
+
         for (spp = sp; spp; spp = spp->next)
             if (spp->type == Metadata_sortkey_relevance)
             {
@@ -935,11 +1245,16 @@ struct record_cluster **show_range_start(struct session *se,
                 break;
             }
         reclist_sort(se->reclist, sp);
-        
+
         reclist_enter(se->reclist);
         *total = reclist_get_num_records(se->reclist);
-        *sumhits = se->total_hits;
-        
+
+        *sumhits = 0;
+        *approx_hits = 0;
+        for (l = se->clients_active; l; l = l->next) {
+            *sumhits += client_get_hits(l->client);
+            *approx_hits += client_get_approximation(l->client);
+        }
         for (i = 0; i < start; i++)
             if (!reclist_read_record(se->reclist))
             {
@@ -947,7 +1262,7 @@ struct record_cluster **show_range_start(struct session *se,
                 recs = 0;
                 break;
             }
-        
+
         for (i = 0; i < *num; i++)
         {
             struct record_cluster *r = reclist_read_record(se->reclist);
@@ -962,7 +1277,7 @@ struct record_cluster **show_range_start(struct session *se,
     }
 #if USE_TIMING
     yaz_timing_stop(t);
-    yaz_log(YLOG_LOG, "show %6.5f %3.2f %3.2f", 
+    yaz_log(YLOG_LOG, "show %6.5f %3.2f %3.2f",
             yaz_timing_get_real(t), yaz_timing_get_user(t),
             yaz_timing_get_sys(t));
     yaz_timing_destroy(&t);
@@ -981,11 +1296,13 @@ void statistics(struct session *se, struct statistics *stat)
     int count = 0;
 
     memset(stat, 0, sizeof(*stat));
-    for (l = se->clients; l; l = l->next)
+    stat->num_hits = 0;
+    for (l = se->clients_active; l; l = l->next)
     {
         struct client *cl = l->client;
         if (!client_get_connection(cl))
             stat->num_no_connection++;
+        stat->num_hits += client_get_hits(cl);
         switch (client_get_state(cl))
         {
         case Client_Connecting: stat->num_connecting++; break;
@@ -997,7 +1314,6 @@ void statistics(struct session *se, struct statistics *stat)
         }
         count++;
     }
-    stat->num_hits = se->total_hits;
     stat->num_records = se->total_records;
 
     stat->num_clients = count;
@@ -1009,7 +1325,7 @@ static struct record_metadata *record_metadata_init(
 {
     struct record_metadata *rec_md = record_metadata_create(nmem);
     struct record_metadata_attr **attrp = &rec_md->attributes;
-    
+
     for (; attr; attr = attr->next)
     {
         if (attr->children && attr->children->content)
@@ -1034,7 +1350,7 @@ static struct record_metadata *record_metadata_init(
         char *p = nmem_strdup(nmem, value);
 
         p = normalize7bit_generic(p, " ,/.:([");
-        
+
         rec_md->data.text.disp = p;
         rec_md->data.text.sort = 0;
     }
@@ -1077,15 +1393,15 @@ static int get_mergekey_from_doc(xmlDoc *doc, xmlNode *root, const char *name,
                 if (value)
                 {
                     const char *norm_str;
-                    pp2_relevance_token_t prt =
-                        pp2_relevance_tokenize(service->mergekey_pct);
-                    
-                    pp2_relevance_first(prt, (const char *) value, 0);
+                    pp2_charset_token_t prt =
+                        pp2_charset_token_create(service->charsets, "mergekey");
+
+                    pp2_charset_token_first(prt, (const char *) value, 0);
                     if (wrbuf_len(norm_wr) > 0)
                         wrbuf_puts(norm_wr, " ");
                     wrbuf_puts(norm_wr, name);
                     while ((norm_str =
-                            pp2_relevance_token_next(prt)))
+                            pp2_charset_token_next(prt)))
                     {
                         if (*norm_str)
                         {
@@ -1094,7 +1410,7 @@ static int get_mergekey_from_doc(xmlDoc *doc, xmlNode *root, const char *name,
                         }
                     }
                     xmlFree(value);
-                    pp2_relevance_token_destroy(prt);
+                    pp2_charset_token_destroy(prt);
                     no_found++;
                 }
             }
@@ -1116,11 +1432,11 @@ static const char *get_mergekey(xmlDoc *doc, struct client *cl, int record_no,
     if (mergekey)
     {
         const char *norm_str;
-        pp2_relevance_token_t prt =
-            pp2_relevance_tokenize(service->mergekey_pct);
+        pp2_charset_token_t prt =
+            pp2_charset_token_create(service->charsets, "mergekey");
 
-        pp2_relevance_first(prt, (const char *) mergekey, 0);
-        while ((norm_str = pp2_relevance_token_next(prt)))
+        pp2_charset_token_first(prt, (const char *) mergekey, 0);
+        while ((norm_str = pp2_charset_token_next(prt)))
         {
             if (*norm_str)
             {
@@ -1129,7 +1445,7 @@ static const char *get_mergekey(xmlDoc *doc, struct client *cl, int record_no,
                 wrbuf_puts(norm_wr, norm_str);
             }
         }
-        pp2_relevance_token_destroy(prt);
+        pp2_charset_token_destroy(prt);
         xmlFree(mergekey);
     }
     else
@@ -1145,7 +1461,7 @@ static const char *get_mergekey(xmlDoc *doc, struct client *cl, int record_no,
                                               service, norm_wr);
                 if (r == 0 && ser_md->mergekey == Metadata_mergekey_required)
                 {
-                    /* no mergekey on this one and it is required.. 
+                    /* no mergekey on this one and it is required..
                        Generate unique key instead */
                     wrbuf_rewind(norm_wr);
                     break;
@@ -1157,8 +1473,13 @@ static const char *get_mergekey(xmlDoc *doc, struct client *cl, int record_no,
     /* generate unique key if none is not generated already or is empty */
     if (wrbuf_len(norm_wr) == 0)
     {
-        wrbuf_printf(norm_wr, "%s-%d",
-                     client_get_database(cl)->database->url, record_no);
+        wrbuf_printf(norm_wr, "position: %s-%d",
+                     client_get_id(cl), record_no);
+    }
+    else
+    {
+        const char *lead = "content: ";
+        wrbuf_insert(norm_wr, 0, lead, strlen(lead));
     }
     if (wrbuf_len(norm_wr) > 0)
         mergekey_norm = nmem_strdup(nmem, wrbuf_cstr(norm_wr));
@@ -1166,7 +1487,7 @@ static const char *get_mergekey(xmlDoc *doc, struct client *cl, int record_no,
     return mergekey_norm;
 }
 
-/** \brief see if metadata for pz:recordfilter exists 
+/** \brief see if metadata for pz:recordfilter exists
     \param root xml root element of normalized record
     \param sdb session database for client
     \retval 0 if there is no metadata for pz:recordfilter
@@ -1175,7 +1496,7 @@ static const char *get_mergekey(xmlDoc *doc, struct client *cl, int record_no,
     If there is no pz:recordfilter defined, this function returns 1
     as well.
 */
-    
+
 static int check_record_filter(xmlNode *root, struct session_database *sdb)
 {
     int match = 0;
@@ -1241,6 +1562,7 @@ static int ingest_to_cluster(struct client *cl,
     \param nmem working NMEM
     \retval 0 OK
     \retval -1 failure
+    \retval -2 Filtered
 */
 int ingest_record(struct client *cl, const char *rec,
                   int record_no, NMEM nmem)
@@ -1252,20 +1574,19 @@ int ingest_record(struct client *cl, const char *rec,
     xmlDoc *xdoc = normalize_record(se, sdb, service, rec, nmem);
     xmlNode *root;
     const char *mergekey_norm;
-    
+
     if (!xdoc)
         return -1;
-    
+
     root = xmlDocGetRootElement(xdoc);
-    
+
     if (!check_record_filter(root, sdb))
     {
-        session_log(se, YLOG_WARN, "Filtered out record no %d from %s",
-                    record_no, sdb->database->url);
+        session_log(se, YLOG_LOG, "Filtered out record no %d from %s", record_no, sdb->database->id);
         xmlFreeDoc(xdoc);
-        return -1;
+        return -2;
     }
-    
+
     mergekey_norm = get_mergekey(xdoc, cl, record_no, service, nmem);
     if (!mergekey_norm)
     {
@@ -1277,11 +1598,83 @@ int ingest_record(struct client *cl, const char *rec,
     if (client_get_session(cl) == se)
         ret = ingest_to_cluster(cl, xdoc, root, record_no, mergekey_norm);
     session_leave(se);
-    
+
     xmlFreeDoc(xdoc);
     return ret;
 }
 
+// Skip record on non-zero
+static int check_limit_local(struct client *cl,
+                             struct record *record,
+                             int record_no)
+{
+    int skip_record = 0;
+    struct session *se = client_get_session(cl);
+    struct conf_service *service = se->service;
+    NMEM nmem_tmp = nmem_create();
+    struct session_database *sdb = client_get_database(cl);
+    int l = 0;
+    while (!skip_record)
+    {
+        struct conf_metadata *ser_md = 0;
+        struct record_metadata *rec_md = 0;
+        int md_field_id;
+        char **values = 0;
+        int i, num_v = 0;
+
+        const char *name = client_get_facet_limit_local(cl, sdb, &l, nmem_tmp, &num_v, &values);
+        if (!name)
+            break;
+
+        md_field_id = conf_service_metadata_field_id(service, name);
+        if (md_field_id < 0)
+        {
+            skip_record = 1;
+            break;
+        }
+        ser_md = &service->metadata[md_field_id];
+        rec_md = record->metadata[md_field_id];
+        yaz_log(YLOG_DEBUG, "check limit local %s", name);
+        for (i = 0; i < num_v; )
+        {
+            if (rec_md)
+            {
+                if (ser_md->type == Metadata_type_year
+                    || ser_md->type == Metadata_type_date)
+                {
+                    int y = atoi(values[i]);
+                    if (y >= rec_md->data.number.min
+                        && y <= rec_md->data.number.max)
+                        break;
+                }
+                else
+                {
+                    yaz_log(YLOG_DEBUG, "cmp: '%s' '%s'", rec_md->data.text.disp, values[i]);
+                    if (!strcmp(rec_md->data.text.disp, values[i]))
+                    {
+                        // Value equals, should not be filtered.
+                        break;
+                    }
+                }
+                rec_md = rec_md->next;
+            }
+            else
+            {
+                rec_md = record->metadata[md_field_id];
+                i++;
+            }
+        }
+        // At end , not match
+        if (i == num_v)
+        {
+            skip_record = 1;
+            break;
+        }
+    }
+    nmem_destroy(nmem_tmp);
+    return skip_record;
+}
+
 static int ingest_to_cluster(struct client *cl,
                              xmlDoc *xdoc,
                              xmlNode *root,
@@ -1291,85 +1684,53 @@ static int ingest_to_cluster(struct client *cl,
     xmlNode *n;
     xmlChar *type = 0;
     xmlChar *value = 0;
-    struct session_database *sdb = client_get_database(cl);
     struct session *se = client_get_session(cl);
     struct conf_service *service = se->service;
-    struct record *record = record_create(se->nmem, 
+    int term_factor = 1;
+    struct record_cluster *cluster;
+    struct session_database *sdb = client_get_database(cl);
+    struct record *record = record_create(se->nmem,
                                           service->num_metadata,
                                           service->num_sortkeys, cl,
                                           record_no);
-    struct record_cluster *cluster = reclist_insert(se->reclist,
-                                                    service, 
-                                                    record,
-                                                    mergekey_norm,
-                                                    &se->total_merged);
-
-    const char *use_term_factor_str = session_setting_oneval(sdb, PZ_TERMLIST_TERM_FACTOR);
-    int use_term_factor = 0;
-    int term_factor = 1; 
-    if (use_term_factor_str && use_term_factor_str[0] != 0)
-       use_term_factor =  atoi(use_term_factor_str);
-    if (use_term_factor) {
-        int maxrecs = client_get_maxrecs(cl);
-        int hits = (int) client_get_hits(cl);
-        term_factor = MAX(hits, maxrecs) /  MAX(1, maxrecs);
-        assert(term_factor >= 1);
-        yaz_log(YLOG_DEBUG, "Using term factor: %d (%d / %d)", term_factor, MAX(hits, maxrecs), MAX(1, maxrecs));
-    }
 
-    if (!cluster)
-        return -1;
-    if (global_parameters.dump_records)
-        session_log(se, YLOG_LOG, "Cluster id %s from %s (#%d)", cluster->recid,
-                    sdb->database->url, record_no);
-    relevance_newrec(se->relevance, cluster);
-    
-    // now parsing XML record and adding data to cluster or record metadata
     for (n = root->children; n; n = n->next)
     {
-        pp2_relevance_token_t prt;
         if (type)
             xmlFree(type);
         if (value)
             xmlFree(value);
         type = value = 0;
-        
+
         if (n->type != XML_ELEMENT_NODE)
             continue;
         if (!strcmp((const char *) n->name, "metadata"))
         {
             struct conf_metadata *ser_md = 0;
-            struct conf_sortkey *ser_sk = 0;
             struct record_metadata **wheretoput = 0;
             struct record_metadata *rec_md = 0;
             int md_field_id = -1;
-            int sk_field_id = -1;
-            
+
             type = xmlGetProp(n, (xmlChar *) "type");
             value = xmlNodeListGetString(xdoc, n->children, 1);
-            
+
             if (!type || !value || !*value)
                 continue;
-            
-            md_field_id 
+
+            md_field_id
                 = conf_service_metadata_field_id(service, (const char *) type);
             if (md_field_id < 0)
             {
                 if (se->number_of_warnings_unknown_metadata == 0)
                 {
-                    session_log(se, YLOG_WARN, 
+                    session_log(se, YLOG_WARN,
                             "Ignoring unknown metadata element: %s", type);
                 }
                 se->number_of_warnings_unknown_metadata++;
                 continue;
             }
-            
+
             ser_md = &service->metadata[md_field_id];
-            
-            if (ser_md->sortkey_offset >= 0){
-                sk_field_id = ser_md->sortkey_offset;
-                ser_sk = &service->sortkeys[sk_field_id];
-            }
 
             // non-merged metadata
             rec_md = record_metadata_init(se->nmem, (const char *) value,
@@ -1384,71 +1745,157 @@ static int ingest_to_cluster(struct client *cl,
             while (*wheretoput)
                 wheretoput = &(*wheretoput)->next;
             *wheretoput = rec_md;
+        }
+    }
+
+    if (check_limit_local(cl, record, record_no))
+    {
+        session_log(se, YLOG_LOG, "Facet filtered out record no %d from %s",
+                    record_no, sdb->database->id);
+        if (type)
+            xmlFree(type);
+        if (value)
+            xmlFree(value);
+        return -2;
+    }
+    cluster = reclist_insert(se->reclist, service, record,
+                             mergekey_norm, &se->total_merged);
+    if (!cluster)
+        return -1;
+
+    {
+        const char *use_term_factor_str =
+            session_setting_oneval(sdb, PZ_TERMLIST_TERM_FACTOR);
+        if (use_term_factor_str && use_term_factor_str[0] == '1')
+        {
+            int maxrecs = client_get_maxrecs(cl);
+            int hits = (int) client_get_hits(cl);
+            term_factor = MAX(hits, maxrecs) /  MAX(1, maxrecs);
+            assert(term_factor >= 1);
+            yaz_log(YLOG_DEBUG, "Using term factor: %d (%d / %d)", term_factor, MAX(hits, maxrecs), MAX(1, maxrecs));
+        }
+    }
+
+    if (global_parameters.dump_records)
+        session_log(se, YLOG_LOG, "Cluster id %s from %s (#%d)", cluster->recid,
+                    sdb->database->id, record_no);
+
+
+    relevance_newrec(se->relevance, cluster);
+
+    // now parsing XML record and adding data to cluster or record metadata
+    for (n = root->children; n; n = n->next)
+    {
+        pp2_charset_token_t prt;
+        if (type)
+            xmlFree(type);
+        if (value)
+            xmlFree(value);
+        type = value = 0;
+
+        if (n->type != XML_ELEMENT_NODE)
+            continue;
+        if (!strcmp((const char *) n->name, "metadata"))
+        {
+            struct conf_metadata *ser_md = 0;
+            struct conf_sortkey *ser_sk = 0;
+            struct record_metadata **wheretoput = 0;
+            struct record_metadata *rec_md = 0;
+            int md_field_id = -1;
+            int sk_field_id = -1;
+            const char *rank;
+            xmlChar *xml_rank;
+
+            type = xmlGetProp(n, (xmlChar *) "type");
+            value = xmlNodeListGetString(xdoc, n->children, 1);
+
+            if (!type || !value || !*value)
+                continue;
+
+            md_field_id
+                = conf_service_metadata_field_id(service, (const char *) type);
+            if (md_field_id < 0)
+                continue;
+
+            ser_md = &service->metadata[md_field_id];
+
+            if (ser_md->sortkey_offset >= 0)
+            {
+                sk_field_id = ser_md->sortkey_offset;
+                ser_sk = &service->sortkeys[sk_field_id];
+            }
 
             // merged metadata
             rec_md = record_metadata_init(se->nmem, (const char *) value,
                                           ser_md->type, 0);
+            if (!rec_md)
+                continue;
+
+            xml_rank = xmlGetProp(n, (xmlChar *) "rank");
+            rank = xml_rank ? (const char *) xml_rank : ser_md->rank;
+
             wheretoput = &cluster->metadata[md_field_id];
 
             // and polulate with data:
             // assign cluster or record based on merge action
             if (ser_md->merge == Metadata_merge_unique)
             {
-                struct record_metadata *mnode;
-                for (mnode = *wheretoput; mnode; mnode = mnode->next)
-                    if (!strcmp((const char *) mnode->data.text.disp, 
+                while (*wheretoput)
+                {
+                    if (!strcmp((const char *) (*wheretoput)->data.text.disp,
                                 rec_md->data.text.disp))
                         break;
-                if (!mnode)
-                {
-                    rec_md->next = *wheretoput;
-                    *wheretoput = rec_md;
+                    wheretoput = &(*wheretoput)->next;
                 }
+                if (!*wheretoput)
+                    *wheretoput = rec_md;
             }
             else if (ser_md->merge == Metadata_merge_longest)
             {
-                if (!*wheretoput 
-                    || strlen(rec_md->data.text.disp) 
+                if (!*wheretoput
+                    || strlen(rec_md->data.text.disp)
                     > strlen((*wheretoput)->data.text.disp))
                 {
                     *wheretoput = rec_md;
                     if (ser_sk)
                     {
                         const char *sort_str = 0;
-                        int skip_article = 
+                        int skip_article =
                             ser_sk->type == Metadata_sortkey_skiparticle;
 
                         if (!cluster->sortkeys[sk_field_id])
-                            cluster->sortkeys[sk_field_id] = 
-                                nmem_malloc(se->nmem, 
+                            cluster->sortkeys[sk_field_id] =
+                                nmem_malloc(se->nmem,
                                             sizeof(union data_types));
-                         
-                        prt = pp2_relevance_tokenize(service->sort_pct);
 
-                        pp2_relevance_first(prt, rec_md->data.text.disp,
-                                            skip_article);
+                        prt =
+                            pp2_charset_token_create(service->charsets, "sort");
+
+                        pp2_charset_token_first(prt, rec_md->data.text.disp,
+                                                skip_article);
+
+                        pp2_charset_token_next(prt);
 
-                        pp2_relevance_token_next(prt);
-                         
                         sort_str = pp2_get_sort(prt);
-                         
-                        cluster->sortkeys[sk_field_id]->text.disp = 
+
+                        cluster->sortkeys[sk_field_id]->text.disp =
                             rec_md->data.text.disp;
                         if (!sort_str)
                         {
                             sort_str = rec_md->data.text.disp;
-                            session_log(se, YLOG_WARN, 
+                            session_log(se, YLOG_WARN,
                                     "Could not make sortkey. Bug #1858");
                         }
-                        cluster->sortkeys[sk_field_id]->text.sort = 
+                        cluster->sortkeys[sk_field_id]->text.sort =
                             nmem_strdup(se->nmem, sort_str);
-                        pp2_relevance_token_destroy(prt);
+                        pp2_charset_token_destroy(prt);
                     }
                 }
             }
             else if (ser_md->merge == Metadata_merge_all)
             {
-                rec_md->next = *wheretoput;
+                while (*wheretoput)
+                    wheretoput = &(*wheretoput)->next;
                 *wheretoput = rec_md;
             }
             else if (ser_md->merge == Metadata_merge_range)
@@ -1457,7 +1904,7 @@ static int ingest_to_cluster(struct client *cl,
                 {
                     *wheretoput = rec_md;
                     if (ser_sk)
-                        cluster->sortkeys[sk_field_id] 
+                        cluster->sortkeys[sk_field_id]
                             = &rec_md->data;
                 }
                 else
@@ -1471,17 +1918,16 @@ static int ingest_to_cluster(struct client *cl,
                 }
             }
 
-
-            // ranking of _all_ fields enabled ... 
-            if (ser_md->rank)
-                relevance_countwords(se->relevance, cluster, 
-                                     (char *) value, ser_md->rank,
-                                     ser_md->name);
+            // ranking of _all_ fields enabled ...
+            if (rank)
+            {
+                relevance_countwords(se->relevance, cluster,
+                                     (char *) value, rank, ser_md->name);
+            }
 
             // construct facets ... unless the client already has reported them
             if (ser_md->termlist && !client_has_facet(cl, (char *) type))
             {
-
                 if (ser_md->type == Metadata_type_year)
                 {
                     char year[64];
@@ -1499,6 +1945,8 @@ static int ingest_to_cluster(struct client *cl,
             }
 
             // cleaning up
+            if (xml_rank)
+                xmlFree(xml_rank);
             xmlFree(type);
             xmlFree(value);
             type = value = 0;
@@ -1529,7 +1977,7 @@ void session_log(struct session *s, int level, const char *fmt, ...)
     va_start(ap, fmt);
 
     yaz_vsnprintf(buf, sizeof(buf)-30, fmt, ap);
-    yaz_log(level, "Session (%u): %s", s->session_id, buf);
+    yaz_log(level, "Session %u: %s", s->session_id, buf);
 
     va_end(ap);
 }