/*
* __wt_lsm_work_bloom --
* Try to create a Bloom filter for the newest on-disk chunk that doesn't
* have one.
*/
int
__wt_lsm_work_bloom(WT_SESSION_IMPL *session, WT_LSM_TREE *lsm_tree)
{
WT_DECL_RET;
WT_LSM_CHUNK *chunk;
WT_LSM_WORKER_COOKIE cookie;
u_int i, merge;
WT_CLEAR(cookie);
WT_RET(__lsm_copy_chunks(session, lsm_tree, &cookie, 0));
/* Create bloom filters in all checkpointed chunks. */
merge = 0;
for (i = 0; i < cookie.nchunks; i++) {
chunk = cookie.chunk_array[i];
/*
* Skip if a thread is still active in the chunk or it
* isn't suitable.
*/
if (!F_ISSET(chunk, WT_LSM_CHUNK_ONDISK) ||
F_ISSET(chunk, WT_LSM_CHUNK_BLOOM | WT_LSM_CHUNK_MERGING) ||
chunk->generation > 0 ||
chunk->count == 0)
continue;
/*
* See if we win the race to switch on the "busy" flag and
* recheck that the chunk still needs a Bloom filter.
*/
if (WT_ATOMIC_CAS4(chunk->bloom_busy, 0, 1)) {
if (!F_ISSET(chunk, WT_LSM_CHUNK_BLOOM)) {
ret = __lsm_bloom_create(
session, lsm_tree, chunk, (u_int)i);
/*
* Record if we were successful so that we can
* later push a merge work unit.
*/
if (ret == 0)
merge = 1;
}
chunk->bloom_busy = 0;
break;
}
}
/*
* If we created any bloom filters, we push a merge work unit now.
*/
if (merge)
WT_ERR(__wt_lsm_manager_push_entry(
session, WT_LSM_WORK_MERGE, 0, lsm_tree));
err:
__lsm_unpin_chunks(session, &cookie);
__wt_free(session, cookie.chunk_array);
return (ret);
}
/*
* __lsm_bloom_work --
* Try to create a Bloom filter for the newest on-disk chunk.
*/
static int
__lsm_bloom_work(WT_SESSION_IMPL *session, WT_LSM_TREE *lsm_tree)
{
WT_DECL_RET;
WT_LSM_CHUNK *chunk;
WT_LSM_WORKER_COOKIE cookie;
u_int i;
WT_CLEAR(cookie);
/* If no work is done, tell our caller by returning WT_NOTFOUND. */
ret = WT_NOTFOUND;
WT_RET(__lsm_copy_chunks(session, lsm_tree, &cookie, 0));
/* Create bloom filters in all checkpointed chunks. */
for (i = 0; i < cookie.nchunks; i++) {
chunk = cookie.chunk_array[i];
/*
* Skip if a thread is still active in the chunk or it
* isn't suitable.
*/
if (!F_ISSET_ATOMIC(chunk, WT_LSM_CHUNK_ONDISK) ||
F_ISSET_ATOMIC(chunk,
WT_LSM_CHUNK_BLOOM | WT_LSM_CHUNK_MERGING) ||
chunk->generation > 0 ||
chunk->count == 0)
continue;
/* See if we win the race to switch on the "busy" flag. */
if (WT_ATOMIC_CAS(chunk->bloom_busy, 0, 1)) {
ret = __lsm_bloom_create(
session, lsm_tree, chunk, (u_int)i);
chunk->bloom_busy = 0;
break;
}
}
__lsm_unpin_chunks(session, &cookie);
__wt_free(session, cookie.chunk_array);
return (ret);
}
