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enable kHashSearch for blocktable in db_bench 

Summary:
  add a flag called use_hash_search in db_bench

Test Plan:
  make all check
  ./db_bench --use_hash_search=1

Reviewers: ljin, haobo, yhchiang, sdong

Reviewed By: sdong

Subscribers: igor, dhruba

Differential Revision: https://reviews.facebook.net/D20067
This commit is contained in:
Feng Zhu 2014-07-16 17:32:30 -07:00
parent 87895c62db
commit bc6b2ab401
1 changed files with 14 additions and 2 deletions
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16
db/db_bench.cc
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@ -538,6 +538,9 @@ DEFINE_string(memtablerep, "skip_list", "");
DEFINE_int64(hash_bucket_count, 1024 * 1024, "hash bucket count");
DEFINE_bool(use_plain_table, false, "if use plain table "
"instead of block-based table format");
DEFINE_bool(use_hash_search, false, "if use kHashSearch "
"instead of kBinarySearch. "
"This is valid if only we use BlockTable");
DEFINE_string(merge_operator, "", "The merge operator to use with the database."
"If a new merge operator is specified, be sure to use fresh"
@ -1624,7 +1627,7 @@ class Benchmark {
options.compaction_style = FLAGS_compaction_style_e;
options.block_size = FLAGS_block_size;
options.filter_policy = filter_policy_;
if (FLAGS_use_plain_table) {
if (FLAGS_prefix_size != 0) {
options.prefix_extractor.reset(
NewFixedPrefixTransform(FLAGS_prefix_size));
}
@ -1685,8 +1688,17 @@ class Benchmark {
if (bloom_bits_per_key < 0) {
bloom_bits_per_key = 0;
}
options.table_factory = std::shared_ptr<TableFactory>(
options.table_factory.reset(
NewPlainTableFactory(FLAGS_key_size, bloom_bits_per_key, 0.75));
} else {
BlockBasedTableOptions block_based_options;
if (FLAGS_use_hash_search) {
block_based_options.index_type = BlockBasedTableOptions::kHashSearch;
} else {
block_based_options.index_type = BlockBasedTableOptions::kBinarySearch;
}
options.table_factory.reset(
NewBlockBasedTableFactory(block_based_options));
}
if (FLAGS_max_bytes_for_level_multiplier_additional_v.size() > 0) {
if (FLAGS_max_bytes_for_level_multiplier_additional_v.size() !=