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666a005f9b
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Siying Dong 666a005f9b Support prefetch last 512KB with direct I/O in block based file reader 
Summary:
Right now, if direct I/O is enabled, prefetching the last 512KB cannot be applied, except compaction inputs or readahead is enabled for iterators. This can create a lot of I/O for HDD cases. To solve the problem, the 512KB is prefetched in block based table if direct I/O is enabled. The prefetched buffer is passed in totegher with random access file reader, so that we try to read from the buffer before reading from the file. This can be extended in the future to support flexible user iterator readahead too.
Closes https://github.com/facebook/rocksdb/pull/2708

Differential Revision: D5593091

Pulled By: siying

fbshipit-source-id: ee36ff6d8af11c312a2622272b21957a7b5c81e7
2017-08-11 12:16:45 -07:00
..
dump Change RocksDB License 2017-07-15 16:11:23 -07:00
rdb Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
auto_sanity_test.sh AIX and Solaris Sparc Support 2017-04-21 20:48:04 -07:00
benchmark_leveldb.sh Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
benchmark.sh Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
blob_dump.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
check_format_compatible.sh Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
CMakeLists.txt cmake support for linux and osx (#1358) 2016-09-28 11:53:15 -07:00
db_bench_tool_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_bench_tool.cc db_bench background work thread pool size arguments 2017-08-03 21:41:49 -07:00
db_bench.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_crashtest.py Use more keys per lock in daily TSAN crash test 2017-08-10 17:56:57 -07:00
db_repl_stress.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_sanity_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_stress.cc Revert "CRC32 Power Optimization Changes" 2017-07-26 19:31:36 -07:00
dbench_monitor Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
Dockerfile adding docker build script and dockerfile 2015-05-22 16:03:39 -07:00
generate_random_db.sh Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
ldb_cmd_impl.h Change RocksDB License 2017-07-15 16:11:23 -07:00
ldb_cmd_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
ldb_cmd.cc Replace dynamic_cast<> 2017-07-28 16:27:16 -07:00
ldb_test.py Add GetAllKeyVersions API 2017-05-12 15:54:06 -07:00
ldb_tool.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
ldb.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
pflag Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
reduce_levels_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
regression_test.sh Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
rocksdb_dump_test.sh AIX and Solaris Sparc Support 2017-04-21 20:48:04 -07:00
run_flash_bench.sh Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
run_leveldb.sh Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
sample-dump.dmp First version of rocksdb_dump and rocksdb_undump. 2015-06-19 16:24:36 -07:00
sst_dump_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
sst_dump_tool_imp.h add VerifyChecksum() to db.h 2017-08-09 15:58:13 -07:00
sst_dump_tool.cc Support prefetch last 512KB with direct I/O in block based file reader 2017-08-11 12:16:45 -07:00
sst_dump.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
verify_random_db.sh Fix /bin/bash shebangs 2017-08-03 15:56:46 -07:00
write_stress_runner.py Write stress test 2015-10-28 16:15:07 -07:00
write_stress.cc tools/write_stress.cc: Correct "1204" typos. 2017-07-17 11:27:10 -07:00