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sdong 876c2dbff4 Allow readahead when reading option files. (#6372) 
Summary:
Right, when reading from option files, no readahead is used and 8KB buffer is used. It might introduce high latency if the file system provide high latency and doesn't do readahead. Instead, introduce a readahead to the file. When calling inside DB, infer the value from options.log_readahead. Otherwise, a default 512KB readahead size is used.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6372

Test Plan: Add --log_readahead_size in db_bench. Run it with several options and observe read size from option files using strace.

Differential Revision: D19727739

fbshipit-source-id: e6d8053b0a64259abc087f1f388b9cd66fa8a583
2020-02-07 15:18:26 -08:00
..
advisor Rules Advisor: some fixes to support fetching stats from ODS (#4223) 2018-08-02 15:42:42 -07:00
block_cache_analyzer Fix compliation error on GCC4.8.2 (#6106) 2019-12-03 11:59:21 -08:00
dump simplify include directive involving inttypes (#5402) 2019-06-06 13:56:07 -07:00
rdb Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
analyze_txn_stress_test.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
auto_sanity_test.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
benchmark.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
benchmark_leveldb.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
blob_dump.cc comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
check_all_python.py Only search specific directories in Python check (#6225) 2019-12-19 15:37:30 -08:00
check_format_compatible.sh Update HISTORY.md for forward compatibility (#6085) 2019-11-26 10:00:31 -08:00
CMakeLists.txt Add an option to the CMake build to disable building shared libraries (#6122) 2019-12-10 15:20:50 -08:00
db_bench.cc simplify include directive involving inttypes (#5402) 2019-06-06 13:56:07 -07:00
db_bench_tool.cc Allow readahead when reading option files. (#6372) 2020-02-07 15:18:26 -08:00
db_bench_tool_test.cc Introduce a new storage specific Env API (#5761) 2019-12-13 14:48:41 -08:00
db_crashtest.py Revert "crash_test to enable block-based table hash index (#6310)" (#6327) 2020-01-23 09:09:17 -08:00
db_repl_stress.cc Move some memory related files from util/ to memory/ (#5382) 2019-05-30 17:44:09 -07:00
db_sanity_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
dbench_monitor Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
Dockerfile
generate_random_db.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
ingest_external_sst.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
ldb.cc comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
ldb_cmd.cc Introduce a new storage specific Env API (#5761) 2019-12-13 14:48:41 -08:00
ldb_cmd_impl.h Support custom env in sst_dump (#5845) 2019-10-08 19:19:12 -07:00
ldb_cmd_test.cc Introduce a new storage specific Env API (#5761) 2019-12-13 14:48:41 -08:00
ldb_test.py Support custom env in sst_dump (#5845) 2019-10-08 19:19:12 -07:00
ldb_tool.cc Support custom env in sst_dump (#5845) 2019-10-08 19:19:12 -07:00
pflag Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
reduce_levels_test.cc Organizing rocksdb/db directory 2019-05-31 11:57:01 -07:00
regression_test.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
report_lite_binary_size.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
rocksdb_dump_test.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
run_flash_bench.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
run_leveldb.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
sample-dump.dmp
sst_dump.cc comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
sst_dump_test.cc Introduce a new storage specific Env API (#5761) 2019-12-13 14:48:41 -08:00
sst_dump_tool.cc Introduce a new storage specific Env API (#5761) 2019-12-13 14:48:41 -08:00
sst_dump_tool_imp.h Support decoding blob indexes in sst_dump (#5926) 2019-10-17 19:36:54 -07:00
trace_analyzer.cc RocksDB Trace Analyzer (#4091) 2018-08-13 11:44:02 -07:00
trace_analyzer_test.cc Allow readahead when reading option files. (#6372) 2020-02-07 15:18:26 -08:00
trace_analyzer_tool.cc Allow readahead when reading option files. (#6372) 2020-02-07 15:18:26 -08:00
trace_analyzer_tool.h Introduce a new storage specific Env API (#5761) 2019-12-13 14:48:41 -08:00
verify_random_db.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
write_external_sst.sh Add copyright headers per FB open-source checkup tool. (#5199) 2019-04-18 10:55:01 -07:00
write_stress.cc Apply formatter to recent 200+ commits. (#5830) 2019-09-20 12:04:26 -07:00
write_stress_runner.py Fix interpreter lines for files with python2-only syntax. 2019-07-09 10:51:37 -07:00