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sdong 37921b4997 db_bench: Add Option -read_random_exp_range to allow read skewness. 
Summary: Introduce parameter -read_random_exp_range in db_bench to provide some key skewness in readrandom and multireadrandom benchmarks. It will helpful to cover block cache better.

Test Plan:
Run benchmarks with this new parameter. I can clearly see block cache hit rate change while I increase this value (DB size is about 66MB):

./db_bench --benchmarks=readrandom -statistics -use_existing_db -cache_size=5000000 --read_random_exp_range=0.0
rocksdb.block.cache.data.miss COUNT : 958418
rocksdb.block.cache.data.hit COUNT : 41582

./db_bench --benchmarks=readrandom -statistics -use_existing_db -cache_size=5000000 --read_random_exp_range=5.0
rocksdb.block.cache.data.miss COUNT : 819518
rocksdb.block.cache.data.hit COUNT : 180482

./db_bench --benchmarks=readrandom -statistics -use_existing_db -cache_size=5000000 --read_random_exp_range=10.0
rocksdb.block.cache.data.miss COUNT : 450479
rocksdb.block.cache.data.hit COUNT : 549521

./db_bench --benchmarks=readrandom -statistics -use_existing_db -cache_size=5000000 --read_random_exp_range=20.0
rocksdb.block.cache.data.miss COUNT : 223192
rocksdb.block.cache.data.hit COUNT : 776808

Reviewers: MarkCallaghan, kradhakrishnan, yhchiang, rven, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D34629
2015-03-09 11:34:52 -07:00
..
builder.cc
Add columnfamily option optimize_filters_for_hits to optimize for key hits only
2015-02-26 16:25:56 -08:00
builder.h
Add columnfamily option optimize_filters_for_hits to optimize for key hits only
2015-02-26 16:25:56 -08:00
c_test.c
rocksdb: Fixed 'Dead assignment' and 'Dead initialization' scan-build warnings
2015-02-23 14:10:09 -08:00
c.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
column_family_test.cc
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
column_family.cc
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
column_family.h
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
compaction_job_test.cc
Introduce job_id for flush and compaction
2015-02-12 09:54:48 -08:00
compaction_job.cc
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
compaction_job.h
Introduce job_id for flush and compaction
2015-02-12 09:54:48 -08:00
compaction_picker_test.cc
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
compaction_picker.cc
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
compaction_picker.h
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
compaction.cc
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
compaction.h
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
comparator_db_test.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
corruption_test.cc
Fail DB::Open() on WAL corruption
2015-01-05 10:26:34 -08:00
cuckoo_table_db_test.cc
remove unreliable test in db/cuckoo_table_db_test.cc
2014-11-24 15:18:09 -08:00
db_bench.cc
db_bench: Add Option -read_random_exp_range to allow read skewness.
2015-03-09 11:34:52 -07:00
db_filesnapshot.cc
Introduce job_id for flush and compaction
2015-02-12 09:54:48 -08:00
db_impl_debug.cc
Add a counter for collecting the wait time on db mutex.
2015-02-04 21:39:45 -08:00
db_impl_readonly.cc
Move GetThreadList() feature under Env.
2014-12-22 12:20:17 -08:00
db_impl_readonly.h
Block ReadOnlyDB in ROCKSDB_LITE
2014-11-26 11:37:59 -08:00
db_impl.cc
Add rate_limiter to string options
2015-03-06 14:21:15 -08:00
db_impl.h
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
db_iter_test.cc
Divide test DBIteratorTest.DBIterator to smaller tests
2015-02-03 09:48:03 -08:00
db_iter.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
db_iter.h
reduce references to cfd->options() in DBImpl
2014-09-08 15:04:34 -07:00
db_test.cc
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
dbformat_test.cc
Use IterKey instead of string in Block::Iter to reduce malloc
2014-07-23 12:31:11 -07:00
dbformat.cc
Turn on -Wshorten-64-to-32 and fix all the errors
2014-11-11 16:47:22 -05:00
dbformat.h
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
deletefile_test.cc
Add rocksdb::ToString() to address cases where std::to_string is not available.
2014-11-24 20:44:49 -08:00
fault_injection_test.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
file_indexer_test.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
file_indexer.cc
Turn on -Wshorten-64-to-32 and fix all the errors
2014-11-11 16:47:22 -05:00
file_indexer.h
Turn on -Wshorten-64-to-32 and fix all the errors
2014-11-11 16:47:22 -05:00
filename_test.cc
Support purging logs from separate log directory
2014-08-14 13:22:50 -07:00
filename.cc
Sync manifest file when initializing it
2015-01-22 14:32:03 -08:00
filename.h
Sync manifest file when initializing it
2015-01-22 14:32:03 -08:00
flush_job_test.cc
Introduce job_id for flush and compaction
2015-02-12 09:54:48 -08:00
flush_job.cc
Allow GetThreadList to reflect flush activity.
2015-02-17 10:13:52 -08:00
flush_job.h
Add a counter for collecting the wait time on db mutex.
2015-02-04 21:39:45 -08:00
flush_scheduler.cc
Don't return (or dereference) dangling pointer
2014-10-02 14:33:16 -07:00
flush_scheduler.h
Fix data race #1
2015-01-26 11:48:07 -08:00
forward_iterator.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
forward_iterator.h
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
internal_stats.cc
Fix a bug in stall time counter. Improve its output format.
2015-03-03 12:48:12 -08:00
internal_stats.h
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
job_context.h
Introduce job_id for flush and compaction
2015-02-12 09:54:48 -08:00
listener_test.cc
Fixed a compile warning in clang in db/listener_test.cc
2015-01-27 15:01:04 -08:00
log_and_apply_bench.cc
Add a counter for collecting the wait time on db mutex.
2015-02-04 21:39:45 -08:00
log_format.h
Some minor refactoring on the code
2014-01-02 16:32:31 -08:00
log_reader.cc
rocksdb: Fixed 'Dead assignment' and 'Dead initialization' scan-build warnings
2015-02-23 14:10:09 -08:00
log_reader.h
Fix UnmarkEOF for partial blocks
2014-01-27 14:49:10 -08:00
log_test.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
log_writer.cc
fix erroneous assert: cast kBlockSize (of type unsigned int) to "int"
2015-02-20 11:07:17 -08:00
log_writer.h
Add appropriate LICENSE and Copyright message.
2013-10-16 17:48:41 -07:00
managed_iterator.cc
Fix compile error on MacOS.
2015-02-24 16:24:53 -08:00
managed_iterator.h
Managed iterator
2015-02-18 11:49:31 -08:00
memtable_allocator.cc
Enforce write buffer memory limit across column families
2014-12-02 12:09:20 -08:00
memtable_allocator.h
Enforce write buffer memory limit across column families
2014-12-02 12:09:20 -08:00
memtable_list.cc
Add a counter for collecting the wait time on db mutex.
2015-02-04 21:39:45 -08:00
memtable_list.h
Add a counter for collecting the wait time on db mutex.
2015-02-04 21:39:45 -08:00
memtable.cc
Instrument memtable seeks
2015-02-27 17:06:06 -08:00
memtable.h
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
memtablerep_bench.cc
Fix clang build
2015-01-13 12:27:28 -08:00
merge_context.h
Enhance partial merge to support multiple arguments
2014-03-24 17:57:13 -07:00
merge_helper.cc
Turn -Wshadow back on
2014-11-06 11:14:28 -08:00
merge_helper.h
Fixed the crash when merge_operator is not properly set after reopen.
2014-07-30 17:24:36 -07:00
merge_operator.cc
Some small cleaning up to make some compiling environment happy
2014-03-26 18:11:41 -07:00
merge_test.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
perf_context_test.cc
Perf Context to report DB mutex waiting time
2015-02-09 17:55:12 -08:00
plain_table_db_test.cc
Add rocksdb::ToString() to address cases where std::to_string is not available.
2014-11-24 20:44:49 -08:00
prefix_test.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
repair.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
skiplist_test.cc
Turn on -Wshorten-64-to-32 and fix all the errors
2014-11-11 16:47:22 -05:00
skiplist.h
Enforce write buffer memory limit across column families
2014-12-02 12:09:20 -08:00
snapshot.h
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
table_cache.cc
TableMock + framework for mock classes
2014-10-28 17:52:32 -07:00
table_cache.h
use GetContext to replace callback function pointer
2014-09-29 11:09:09 -07:00
table_properties_collector_test.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
table_properties_collector.cc
Add rocksdb::ToString() to address cases where std::to_string is not available.
2014-11-24 20:44:49 -08:00
table_properties_collector.h
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
transaction_log_impl.cc
Turn -Wshadow back on
2014-11-06 11:14:28 -08:00
transaction_log_impl.h
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
version_builder_test.cc
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
version_builder.cc
Fix deleting obsolete files
2015-02-06 08:44:30 -08:00
version_builder.h
Move VersionBuilder logic to a separate .cc file
2014-10-31 16:34:38 -07:00
version_edit_test.cc
Turn on -Wshorten-64-to-32 and fix all the errors
2014-11-11 16:47:22 -05:00
version_edit.cc
Turn on -Wshadow
2014-10-31 11:59:54 -07:00
version_edit.h
Fix deleting obsolete files
2015-02-06 08:44:30 -08:00
version_set_test.cc
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
version_set.cc
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
version_set.h
options.level_compaction_dynamic_level_bytes to allow RocksDB to pick size bases of levels dynamically.
2015-03-02 22:40:41 -08:00
wal_manager_test.cc
Enforce write buffer memory limit across column families
2014-12-02 12:09:20 -08:00
wal_manager.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
wal_manager.h
Fix -Wnon-virtual-dtor errors
2014-11-10 17:39:38 -05:00
write_batch_internal.h
remove all remaining references to cfd->options()
2014-11-18 10:20:10 -08:00
write_batch_test.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
write_batch.cc
rocksdb: Add missing override
2015-02-26 11:28:41 -08:00
write_controller_test.cc
Push- instead of pull-model for managing Write stalls
2014-09-08 11:20:25 -07:00
write_controller.cc
Push- instead of pull-model for managing Write stalls
2014-09-08 11:20:25 -07:00
write_controller.h
Fix #284
2014-09-13 14:14:10 -07:00
write_thread.cc
WriteThread
2014-09-12 16:23:58 -07:00
write_thread.h
Add a counter for collecting the wait time on db mutex.
2015-02-04 21:39:45 -08:00
writebuffer.h
Enforce write buffer memory limit across column families
2014-12-02 12:09:20 -08:00