-/* $Id: isamb.c,v 1.85 2006-11-14 08:12:08 adam Exp $
+/* $Id: isamb.c,v 1.88 2006-12-12 13:46:41 adam Exp $
Copyright (C) 1995-2006
Index Data ApS
#define ISAMB_MAX_LEVEL 10
/* approx 2*max page + max size of item */
-#define DST_BUF_SIZE 16840
+#define DST_BUF_SIZE (2*4096+300)
+/* should be maximum block size of multiple thereof */
#define ISAMB_CACHE_ENTRY_SIZE 4096
/* CAT_MAX: _must_ be power of 2 */
zint returned_numbers;
zint skipped_nodes[ISAMB_MAX_LEVEL]; /* [0]=skipped leaves, 1 = higher etc */
zint accessed_nodes[ISAMB_MAX_LEVEL]; /* nodes we did not skip */
+ zint number_of_int_splits;
+ zint number_of_leaf_splits;
+ int enable_int_count; /* whether we count nodes (or not) */
+ int cache_size; /* size of blocks to cache (if cache=1) */
};
struct ISAMB_block {
}
#endif
+
+void isamb_set_int_count(ISAMB b, int v)
+{
+ b->enable_int_count = v;
+}
+
+void isamb_set_cache_size(ISAMB b, int v)
+{
+ b->cache_size = v;
+}
+
ISAMB isamb_open(BFiles bfs, const char *name, int writeflag, ISAMC_M *method,
int cache)
{
isamb->cache = cache;
isamb->skipped_numbers = 0;
isamb->returned_numbers = 0;
+ isamb->number_of_int_splits = 0;
+ isamb->number_of_leaf_splits = 0;
+ isamb->enable_int_count = 1;
+ isamb->cache_size = 40;
+
for (i = 0; i<ISAMB_MAX_LEVEL; i++)
isamb->skipped_nodes[i] = isamb->accessed_nodes[i] = 0;
- assert(cache == 0);
+ if (cache == -1)
+ {
+ yaz_log(YLOG_WARN, "isamb_open %s. Degraded TEST mode", name);
+ }
+ else
+ {
+ assert(cache == 0 || cache == 1);
+ }
isamb->file = xmalloc(sizeof(*isamb->file) * isamb->no_cat);
for (i = 0; i < isamb->no_cat; i++)
isamb->file[i].head.first_block = ISAMB_CACHE_ENTRY_SIZE/b_size+1;
isamb->file[i].head.last_block = isamb->file[i].head.first_block;
isamb->file[i].head.block_size = b_size;
+ assert(b_size <= ISAMB_CACHE_ENTRY_SIZE);
#if ISAMB_PTR_CODEC
if (i == isamb->no_cat-1 || b_size > 128)
isamb->file[i].head.block_offset = 8;
return 1;
}
}
- if (no >= 40)
+ if (no >= b->cache_size)
{
- assert (no == 40);
assert (ce_last && *ce_last);
ce_this = *ce_last;
*ce_last = 0; /* remove the last entry from list */
if (!cache_block (b, pos, p->buf, 0))
{
yaz_log(b->log_io, "bf_read: open_block");
- if (!bf_read(b->file[cat].bf, pos/CAT_MAX, 0, 0, p->buf))
+ if (bf_read(b->file[cat].bf, pos/CAT_MAX, 0, 0, p->buf) != 1)
{
yaz_log(YLOG_FATAL, "isamb: read fail for pos=%ld block=%ld",
(long) pos, (long) pos/CAT_MAX);
- abort();
+ zebra_exit("isamb:open_block");
}
}
p->bytes = (char *)p->buf + offset;
{
yaz_log(YLOG_FATAL, "isamb: read fail for pos=%ld block=%ld",
(long) p->pos/CAT_MAX, (long) p->pos/CAT_MAX);
- abort ();
+ zebra_exit("isamb:new_block");
}
}
yaz_log(b->log_freelist, "got block " ZINT_FORMAT " from freelist %d:" ZINT_FORMAT, p->pos,
const char *half;
src = dst_buf;
endp = dst;
+
+ b->number_of_int_splits++;
p->dirty = 1;
close_block(b, sub_p2);
half = src + b->file[p->cat].head.block_size/2;
decode_ptr(&src, &pos);
- /* read sub block so we can get no_items for it */
- sub_p3 = open_block(b, pos);
- no_items_first_half += sub_p3->no_items;
- close_block(b, sub_p3);
+ if (b->enable_int_count)
+ {
+ /* read sub block so we can get no_items for it */
+ sub_p3 = open_block(b, pos);
+ no_items_first_half += sub_p3->no_items;
+ close_block(b, sub_p3);
+ }
while (src <= half)
{
#endif
decode_ptr(&src, &pos);
- /* read sub block so we can get no_items for it */
- sub_p3 = open_block(b, pos);
- no_items_first_half += sub_p3->no_items;
- close_block(b, sub_p3);
+ if (b->enable_int_count)
+ {
+ /* read sub block so we can get no_items for it */
+ sub_p3 = open_block(b, pos);
+ no_items_first_half += sub_p3->no_items;
+ close_block(b, sub_p3);
+ }
}
/* p is first half */
p_new_size = src - dst_buf;
if (!*lookahead_mode)
{
yaz_log(YLOG_WARN, "isamb: Inconsistent register (1)");
- assert (*lookahead_mode);
+ assert(*lookahead_mode);
}
}
else
{
/* this is append. So a delete is bad */
yaz_log(YLOG_WARN, "isamb: Inconsistent register (2)");
- abort();
+ assert(*lookahead_mode);
}
else if (!half1 && dst > tail_cut)
{
(*b->method->codec.reset)(c2);
+ b->number_of_leaf_splits++;
+
first_dst = (*sp2)->bytes;
(*b->method->codec.encode)(c2, &first_dst, &cut_item);
}
return 1;
}
+
+zint isamb_get_int_splits(ISAMB b)
+{
+ return b->number_of_int_splits;
+}
+
+zint isamb_get_leaf_splits(ISAMB b)
+{
+ return b->number_of_leaf_splits;
+}
+
/*
* Local variables:
* c-basic-offset: 4