-/*
- * Copyright (C) 1994, Index Data I/S
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: isam.c,v $
- * Revision 1.2 1994-09-26 16:07:53 quinn
- * Most of the functionality in place.
- *
- * Revision 1.1 1994/09/12 08:02:13 quinn
- * Not functional yet
- *
- */
+/* $Id: isam.c,v 1.27 2002-08-02 19:26:56 adam Exp $
+ Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002
+ Index Data Aps
+
+This file is part of the Zebra server.
+
+Zebra 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
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+You should have received a copy of the GNU General Public License
+along with Zebra; see the file LICENSE.zebra. If not, write to the
+Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.
+*/
+
+
+
+#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
-#include <util.h>
-#include "isutil.h"
-#include "rootblk.h"
+#include <zebrautl.h>
#include <bfile.h>
#include <isam.h>
-#include <common.h>
-#include "memory.h"
-#include "physical.h"
+#include "isutil.h"
+#include "rootblk.h"
#include "keyops.h"
+static ispt_struct *ispt_freelist = 0;
+
+static struct
+{
+ int total_merge_operations;
+ int total_items;
+ int dub_items_removed;
+ int new_items;
+ int failed_deletes;
+ int skipped_inserts;
+ int delete_insert_noop;
+ int delete_replace;
+ int deletes;
+ int remaps;
+ int block_jumps;
+ int tab_deletes;
+ int new_tables;
+} statistics;
+
+static ISPT ispt_alloc()
+{
+ ISPT p;
+
+ if (ispt_freelist)
+ {
+ p = ispt_freelist;
+ ispt_freelist = ispt_freelist->next;
+ }
+ else
+ p = (ISPT) xmalloc(sizeof(ispt_struct));
+ return p;
+}
+
+static void ispt_free(ISPT pt)
+{
+ pt->next = ispt_freelist;
+ ispt_freelist = pt;
+}
+
static int splitargs(const char *s, char *bf[], int max)
{
int ct = 0;
ct++;
if (ct > max)
{
- log(LOG_WARN, "Ignoring extra args to is resource");
+ logf (LOG_WARN, "Ignoring extra args to is resource");
bf[ct] = '\0';
return(ct - 1);
}
* Open isam file.
* Process resources.
*/
-ISAM is_open(const char *name, int writeflag)
+ISAM is_open(BFiles bfs, const char *name,
+ int (*cmp)(const void *p1, const void *p2),
+ int writeflag, int keysize, Res res)
{
- ISAM new;
+ ISAM inew;
char *nm, *r, *pp[IS_MAX_BLOCKTYPES+1], m[2];
int num, size, rs, tmp, i;
is_type_header th;
- log(LOG_DEBUG, "is_open(%s, %s)", name, writeflag ? "RW" : "RDONLY");
- new = xmalloc(sizeof(*new));
- new->writeflag = writeflag;
+ logf (LOG_DEBUG, "is_open(%s, %s)", name, writeflag ? "RW" : "RDONLY");
+ if (writeflag)
+ {
+ statistics.total_merge_operations = 0;
+ statistics.total_items = 0;
+ statistics.dub_items_removed = 0;
+ statistics.new_items = 0;
+ statistics.failed_deletes = 0;
+ statistics.skipped_inserts = 0;
+ statistics.delete_insert_noop = 0;
+ statistics.delete_replace = 0;
+ statistics.deletes = 0;
+ statistics.remaps = 0;
+ statistics.new_tables = 0;
+ statistics.block_jumps = 0;
+ statistics.tab_deletes = 0;
+ }
+
+ inew = (ISAM) xmalloc(sizeof(*inew));
+ inew->writeflag = writeflag;
for (i = 0; i < IS_MAX_BLOCKTYPES; i++)
- new->types[i].index = 0; /* dummy */
+ inew->types[i].index = 0; /* dummy */
/* determine number and size of blocktypes */
- if (!(r = res_get(common_resource, nm = strconcat(name, ".",
- "blocktypes", 0))) || !(num = splitargs(r, pp, IS_MAX_BLOCKTYPES)))
+ if (!(r = res_get_def(res,
+ nm = strconcat(name, ".",
+ "blocktypes", 0), "64 512 4K 32K")) ||
+ !(num = splitargs(r, pp, IS_MAX_BLOCKTYPES)))
{
- log(LOG_FATAL, "Failed to locate resource %s", nm);
+ logf (LOG_FATAL, "Failed to locate resource %s", nm);
return 0;
}
- new->num_types = num;
+ inew->num_types = num;
for (i = 0; i < num; i++)
{
if ((rs = sscanf(pp[i], "%d%1[bBkKmM]", &size, m)) < 1)
{
- log(LOG_FATAL, "Error in resource %s: %s", r, pp[i]);
+ logf (LOG_FATAL, "Error in resource %s: %s", r, pp[i]);
return 0;
}
if (rs == 1)
switch (*m)
{
case 'b': case 'B':
- new->types[i].blocksize = size; break;
+ inew->types[i].blocksize = size; break;
case 'k': case 'K':
- new->types[i].blocksize = size * 1024; break;
+ inew->types[i].blocksize = size * 1024; break;
case 'm': case 'M':
- new->types[i].blocksize = size * 1048576; break;
+ inew->types[i].blocksize = size * 1048576; break;
default:
- log(LOG_FATAL, "Illegal size suffix: %c", *m);
+ logf (LOG_FATAL, "Illegal size suffix: %c", *m);
return 0;
}
- new->types[i].dbuf = xmalloc(new->types[i].blocksize);
+ inew->types[i].dbuf = (char *) xmalloc(inew->types[i].blocksize);
m[0] = 'A' + i;
m[1] = '\0';
- if (!(new->types[i].bf = bf_open(strconcat(name, m, 0),
- new->types[i].blocksize, writeflag)))
+ if (!(inew->types[i].bf = bf_open(bfs, strconcat(name, m, 0),
+ inew->types[i].blocksize, writeflag)))
{
- log(LOG_FATAL, "bf_open failed");
+ logf (LOG_FATAL, "bf_open failed");
return 0;
}
- if ((rs = is_rb_read(&new->types[i], &th)) > 0)
+ if ((rs = is_rb_read(&inew->types[i], &th)) > 0)
{
- if (th.blocksize != new->types[i].blocksize)
+ if (th.blocksize != inew->types[i].blocksize)
{
- log(LOG_FATAL, "File blocksize mismatch in %s", name);
+ logf (LOG_FATAL, "File blocksize mismatch in %s", name);
exit(1);
}
- new->types[i].freelist = th.freelist;
- new->types[i].top = th.top;
+ inew->types[i].freelist = th.freelist;
+ inew->types[i].top = th.top;
}
else if (writeflag) /* write dummy superblock to determine top */
{
- if ((rs = is_rb_write(&new->types[i], &th)) <=0) /* dummy */
+ if ((rs = is_rb_write(&inew->types[i], &th)) <=0) /* dummy */
{
- log(LOG_FATAL, "Failed to write initial superblock.");
+ logf (LOG_FATAL, "Failed to write initial superblock.");
exit(1);
}
- new->types[i].freelist = -1;
- new->types[i].top = rs;
+ inew->types[i].freelist = -1;
+ inew->types[i].top = rs;
}
/* ELSE: this is an empty file opened in read-only mode. */
}
- if (!(r = res_get_def(common_resource, nm = strconcat(name, ".", "keysize",
- 0), "4")))
- {
- log(LOG_FATAL, "Failed to locate resource %s", nm);
- return 0;
- }
- if ((new->keysize = atoi(r)) <= 0)
+ if (keysize > 0)
+ inew->keysize = keysize;
+ else
{
- log(LOG_FATAL, "Must specify positive keysize.");
- return 0;
+ if (!(r = res_get_def(res, nm = strconcat(name, ".",
+ "keysize", 0), "4")))
+ {
+ logf (LOG_FATAL, "Failed to locate resource %s", nm);
+ return 0;
+ }
+ if ((inew->keysize = atoi(r)) <= 0)
+ {
+ logf (LOG_FATAL, "Must specify positive keysize.");
+ return 0;
+ }
}
/* determine repack percent */
- if (!(r = res_get_def(common_resource, nm = strconcat(name, ".", "repack",
- 0), IS_DEF_REPACK_PERCENT)))
+ if (!(r = res_get_def(res, nm = strconcat(name, ".", "repack",
+ 0), IS_DEF_REPACK_PERCENT)))
{
- log(LOG_FATAL, "Failed to locate resource %s", nm);
+ logf (LOG_FATAL, "Failed to locate resource %s", nm);
return 0;
}
- new->repack = atoi(r);
+ inew->repack = atoi(r);
/* determine max keys/blocksize */
- if (!(r = res_get(common_resource, nm = strconcat(name, ".",
- "maxkeys", 0))) || !(num = splitargs(r, pp, IS_MAX_BLOCKTYPES)))
+ if (!(r = res_get_def(res,
+ nm = strconcat(name, ".",
+ "maxkeys", 0), "50 640 10000")) ||
+ !(num = splitargs(r, pp, IS_MAX_BLOCKTYPES)))
{
- log(LOG_FATAL, "Failed to locate resource %s", nm);
+ logf (LOG_FATAL, "Failed to locate resource %s", nm);
return 0;
}
- if (num < new->num_types -1)
+ if (num < inew->num_types -1)
{
- log(LOG_FATAL, "Not enough elements in %s", nm);
+ logf (LOG_FATAL, "Not enough elements in %s", nm);
return 0;
}
for (i = 0; i < num; i++)
{
if ((rs = sscanf(pp[i], "%d", &tmp)) < 1)
{
- log(LOG_FATAL, "Error in resource %s: %s", r, pp[i]);
+ logf (LOG_FATAL, "Error in resource %s: %s", r, pp[i]);
return 0;
}
- new->types[i].max_keys = tmp;
+ inew->types[i].max_keys = tmp;
}
/* determine max keys/block */
- for (i = 0; i < new->num_types; i++)
+ for (i = 0; i < inew->num_types; i++)
{
- if (!new->types[i].index)
+ if (!inew->types[i].index)
{
- new->types[i].max_keys_block = (new->types[i].blocksize - 2 *
- sizeof(int)) / new->keysize;
- new->types[i].max_keys_block0 = (new->types[i].blocksize - 3 *
- sizeof(int)) / new->keysize;
+ inew->types[i].max_keys_block = (inew->types[i].blocksize - 2 *
+ sizeof(int)) / inew->keysize;
+ inew->types[i].max_keys_block0 = (inew->types[i].blocksize - 3 *
+ sizeof(int)) / inew->keysize;
}
else
- new->types[i].max_keys_block = new->types[i].max_keys_block0 /
- new->keysize;
- if (new->types[i].max_keys_block0 < 1)
+ inew->types[i].max_keys_block = inew->types[i].max_keys_block0 /
+ inew->keysize;
+ if (inew->types[i].max_keys_block0 < 1)
{
- log(LOG_FATAL, "Blocksize too small in %s", name);
+ logf (LOG_FATAL, "Blocksize too small in %s", name);
exit(1);
}
}
/* determine nice fill rates */
- if (!(r = res_get(common_resource, nm = strconcat(name, ".",
- "nicefill", 0))) || !(num = splitargs(r, pp, IS_MAX_BLOCKTYPES)))
+ if (!(r = res_get_def(res,
+ nm = strconcat(name, ".",
+ "nicefill", 0), "90 90 90 95")) ||
+ !(num = splitargs(r, pp, IS_MAX_BLOCKTYPES)))
{
- log(LOG_FATAL, "Failed to locate resource %s", nm);
+ logf (LOG_FATAL, "Failed to locate resource %s", nm);
return 0;
}
- if (num < new->num_types)
+ if (num < inew->num_types)
{
- log(LOG_FATAL, "Not enough elements in %s", nm);
+ logf (LOG_FATAL, "Not enough elements in %s", nm);
return 0;
}
for (i = 0; i < num; i++)
{
if ((rs = sscanf(pp[i], "%d", &tmp)) < 1)
{
- log(LOG_FATAL, "Error in resource %s: %s", r, pp[i]);
+ logf (LOG_FATAL, "Error in resource %s: %s", r, pp[i]);
return 0;
}
- new->types[i].nice_keys_block = (new->types[i].max_keys_block0 * tmp) /
+ inew->types[i].nice_keys_block = (inew->types[i].max_keys_block0 * tmp) /
100;
- if (new->types[i].nice_keys_block < 1)
- new->types[i].nice_keys_block = 1;
+ if (inew->types[i].nice_keys_block < 1)
+ inew->types[i].nice_keys_block = 1;
}
- new->cmp = is_default_cmp;
- return new;
+ inew->cmp = cmp ? cmp : is_default_cmp;
+ return inew;
}
/*
int i;
is_type_header th;
- log(LOG_DEBUG, "is_close()");
+ logf (LOG_DEBUG, "is_close()");
for (i = 0; i < is->num_types; i++)
{
if (is->types[i].bf)
th.top = is->types[i].top;
if (is_rb_write(&is->types[i], &th) < 0)
{
- log(LOG_FATAL, "Failed to write headerblock");
+ logf (LOG_FATAL, "Failed to write headerblock");
exit(1);
}
}
bf_close(is->types[i].bf);
}
}
+ for (i = 0; i < is->num_types; i++)
+ xfree (is->types[i].dbuf);
+
+ if (is->writeflag)
+ {
+ logf(LOG_LOG, "ISAM statistics:");
+ logf(LOG_LOG, "total_merge_operations %d",
+ statistics.total_merge_operations);
+ logf(LOG_LOG, "total_items %d", statistics.total_items);
+ logf(LOG_LOG, "dub_items_removed %d",
+ statistics.dub_items_removed);
+ logf(LOG_LOG, "new_items %d", statistics.new_items);
+ logf(LOG_LOG, "failed_deletes %d",
+ statistics.failed_deletes);
+ logf(LOG_LOG, "skipped_inserts %d",
+ statistics.skipped_inserts);
+ logf(LOG_LOG, "delete_insert_noop %d",
+ statistics.delete_insert_noop);
+ logf(LOG_LOG, "delete_replace %d",
+ statistics.delete_replace);
+ logf(LOG_LOG, "delete %d", statistics.deletes);
+ logf(LOG_LOG, "remaps %d", statistics.remaps);
+ logf(LOG_LOG, "block_jumps %d", statistics.block_jumps);
+ logf(LOG_LOG, "tab_deletes %d", statistics.tab_deletes);
+ }
xfree(is);
return 0;
}
return r;
}
-ISAM_P is_merge(ISAM is, ISAM_P pos, int num, const char *data)
+ISAM_P is_merge(ISAM is, ISAM_P pos, int num, char *data)
{
is_mtable tab;
int res;
char keybuf[IS_MAX_RECORD];
- int oldnum, oldtype;
+ int oldnum, oldtype, i;
char operation, *record;
+ statistics.total_merge_operations++;
+ statistics.total_items += num;
+ if (!pos)
+ statistics.new_tables++;
+
is_m_establish_tab(is, &tab, pos);
- /* TODO: do something to aquire oldnum at this point */
if (pos)
if (is_m_read_full(&tab, tab.data) < 0)
{
- log(LOG_FATAL, "read_full failed");
+ logf (LOG_FATAL, "read_full failed");
exit(1);
}
oldnum = tab.num_records;
while (num)
{
operation = *(data)++;
- record = (char*)data;
+ record = (char*) data;
data += is_keysize(is);
num--;
- while (num && !memcmp(record, data, is_keysize(tab.is) + 1))
+ while (num && !memcmp(record - 1, data, is_keysize(tab.is) + 1))
{
data += 1 + is_keysize(is);
num--;
+ statistics.dub_items_removed++;
}
if ((res = is_m_seek_record(&tab, record)) > 0) /* no match */
{
if (operation == KEYOP_INSERT)
{
- log(LOG_DEBUG, "XXInserting new record.");
+ logf (LOG_DEBUG, "XXInserting new record.");
is_m_write_record(&tab, record);
+ statistics.new_items++;
}
else
- log(LOG_DEBUG, "XXDeletion failed to find match.");
+ {
+ logf (LOG_DEBUG, "XXDeletion failed to find match.");
+ statistics.failed_deletes++;
+ }
}
else /* match found */
{
if (operation == KEYOP_INSERT)
{
- log(LOG_DEBUG, "XXSkipping insertion - match found.");
+ logf (LOG_DEBUG, "XXSkipping insertion - match found.");
+ statistics.skipped_inserts++;
continue;
}
else if (operation == KEYOP_DELETE)
/* next key is identical insert? - NOOP - skip it */
if (!memcmp(record, data + 1, is_keysize(is)))
{
- log(LOG_DEBUG, "XXNoop delete. skipping.");
+ logf (LOG_DEBUG, "XXNoop delete. skipping.");
data += 1 + is_keysize(is);
num--;
+ while (num && !memcmp(data, data + is_keysize(tab.is) +
+ 1, is_keysize(tab.is) + 1))
+ {
+ data += 1 + is_keysize(is);
+ num--;
+ statistics.dub_items_removed++;
+ }
+ statistics.delete_insert_noop++;
continue;
}
/* else check if next key can fit in this position */
- is_m_peek_record(&tab, keybuf);
- res = (*is->cmp)(data + 1, keybuf);
- if (res < 0)
+ if (is_m_peek_record(&tab, keybuf) &&
+ (*is->cmp)(data + 1, keybuf) < 0)
{
- log(LOG_DEBUG, "XXReplacing record.");
+ logf (LOG_DEBUG, "XXReplacing record.");
is_m_replace_record(&tab, data + 1);
data += 1 + is_keysize(is);
num--;
+ while (num && !memcmp(data, data + is_keysize(tab.is) +
+ 1, is_keysize(tab.is) + 1))
+ {
+ data += 1 + is_keysize(is);
+ num--;
+ statistics.dub_items_removed++;
+ }
+ statistics.delete_replace++;
continue;
}
}
- log(LOG_DEBUG, "Deleting record.");
+ logf (LOG_DEBUG, "Deleting record.");
is_m_delete_record(&tab);
+ statistics.deletes++;
}
}
}
- while (tab.pos_type < tab.is->num_types - 1 && tab.num_records >
- tab.is->types[tab.pos_type].max_keys)
- tab.pos_type++;
+ i = tab.pos_type;
+ while (i < tab.is->num_types - 1 && tab.num_records >
+ tab.is->types[i].max_keys)
+ i++;
+ if (i != tab.pos_type)
+ {
+ /* read remaining blocks */
+ for (; tab.cur_mblock; tab.cur_mblock = tab.cur_mblock->next)
+ if (tab.cur_mblock->state < IS_MBSTATE_CLEAN)
+ is_m_read_full(&tab, tab.cur_mblock);
+ is_p_unmap(&tab);
+ tab.pos_type = i;
+ if (pos)
+ statistics.block_jumps++;
+ }
if (!oldnum || tab.pos_type != oldtype || (abs(oldnum - tab.num_records) *
100) / oldnum > tab.is->repack)
+ {
is_p_remap(&tab);
+ statistics.remaps++;
+ }
else
is_p_align(&tab);
- is_p_sync(&tab);
- return is_address(tab.pos_type, tab.data->diskpos);
+ if (tab.data)
+ {
+ is_p_sync(&tab);
+ pos = is_address(tab.pos_type, tab.data->diskpos);
+ }
+ else
+ {
+ pos = 0;
+ statistics.tab_deletes++;
+ }
+ is_m_release_tab(&tab);
+ return pos;
+}
+
+/*
+ * Locate a table of keys in an isam file. The ISPT is an individual
+ * position marker for that table.
+ */
+ISPT is_position(ISAM is, ISAM_P pos)
+{
+ ispt_struct *p;
+
+ p = ispt_alloc();
+ is_m_establish_tab(is, &p->tab, pos);
+ return p;
}
+
+/*
+ * Release ISPT.
+ */
+void is_pt_free(ISPT ip)
+{
+ is_m_release_tab(&ip->tab);
+ ispt_free(ip);
+}
+
+/*
+ * Read a key from a table.
+ */
+int is_readkey(ISPT ip, void *buf)
+{
+ return is_m_read_record(&ip->tab, buf, 0);
+}
+
+int is_numkeys(ISPT ip)
+{
+ return is_m_num_records(&ip->tab);
+}
+
+void is_rewind(ISPT ip)
+{
+ is_m_rewind(&ip->tab);
+}
projects / idzebra-moved-to-github.git / blobdiff