*search_req->largeSetLowerBound = 2000000000;
*search_req->smallSetUpperBound = 0;
*search_req->mediumSetPresentNumber = r->step>0 ? r->step : r->count;
*search_req->largeSetLowerBound = 2000000000;
*search_req->smallSetUpperBound = 0;
*search_req->mediumSetPresentNumber = r->step>0 ? r->step : r->count;