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8 commits

Author SHA1 Message Date
Dmitri Smirnov cdad04b051 Remove double buffering on RandomRead on Windows. 
Summary:
Remove double buffering on RandomRead on Windows.
  With more logic appear in file reader/write Read no longer
  obeys forwarding calls to Windows implementation.
  Previously direct_io (unbuffered) was only available on Windows
  but now is supported as generic.
  We remove intermediate buffering on Windows.
  Remove random_access_max_buffer_size option which was windows specific.
  Non-zero values for that opton introduced unnecessary lock contention.
  Remove Env::EnableReadAhead(), Env::ShouldForwardRawRequest() that are
  no longer necessary.
  Add aligned buffer reads for cases when requested reads exceed read ahead size.
Closes https://github.com/facebook/rocksdb/pull/2105

Differential Revision: D4847770

Pulled By: siying

fbshipit-source-id: 8ab48f8e854ab498a4fd398a6934859792a2788f
 2017-04-27 12:30:05 -07:00
Dmitri Smirnov 324a0f988e Follow up for DirectIO refactor 
Summary: Windows follow up for  dc2584eea0

Differential Revision: D4420337

Pulled By: IslamAbdelRahman

fbshipit-source-id: fedc5b5
 2017-01-15 13:24:16 -08:00
Aaron Gao 3e6899d116 change UseDirectIO() to use_direct_io() 
Summary:
also change variable name `direct_io_` to `use_direct_io_` in WritableFile to make it consistent with read path.
Closes https://github.com/facebook/rocksdb/pull/1770

Differential Revision: D4416435

Pulled By: lightmark

fbshipit-source-id: 4143c53
 2017-01-13 12:09:15 -08:00
Aaron Gao 972f96b3fb direct io write support 
Summary:
rocksdb direct io support

```
[gzh@dev11575.prn2 ~/rocksdb] ./db_bench -benchmarks=fillseq --num=1000000
Initializing RocksDB Options from the specified file
Initializing RocksDB Options from command-line flags
RocksDB:    version 5.0
Date:       Wed Nov 23 13:17:43 2016
CPU:        40 * Intel(R) Xeon(R) CPU E5-2660 v2 @ 2.20GHz
CPUCache:   25600 KB
Keys:       16 bytes each
Values:     100 bytes each (50 bytes after compression)
Entries:    1000000
Prefix:    0 bytes
Keys per prefix:    0
RawSize:    110.6 MB (estimated)
FileSize:   62.9 MB (estimated)
Write rate: 0 bytes/second
Compression: Snappy
Memtablerep: skip_list
Perf Level: 1
WARNING: Assertions are enabled; benchmarks unnecessarily slow
------------------------------------------------
Initializing RocksDB Options from the specified file
Initializing RocksDB Options from command-line flags
DB path: [/tmp/rocksdbtest-112628/dbbench]
fillseq      :       4.393 micros/op 227639 ops/sec;   25.2 MB/s

[gzh@dev11575.prn2 ~/roc
Closes https://github.com/facebook/rocksdb/pull/1564

Differential Revision: D4241093

Pulled By: lightmark

fbshipit-source-id: 98c29e3
 2016-12-22 13:09:19 -08:00
Edouard A 99c052a34f Fix integer overflow in GetL0ThresholdSpeedupCompaction (#1378) 2016-10-23 18:43:29 -07:00
Dmitri Smirnov b9311aa65c Implement WinRandomRW file and improve code reuse (#1388) 2016-10-13 16:36:34 -07:00
Edouard A 66a91e2607 Add NoSpace subcode to IOError (#1320) 
Add a sub code to distinguish "out of space" errors from regular I/O errors
 2016-09-07 12:37:45 -07:00
Dmitri Smirnov 26adaad438 Split WinEnv into separate classes. (#1128) 
For ease of reuse and customization as a library
  without wrapping.
  WinEnvThreads is a class for replacement.
  WintEnvIO is a class for reuse and behavior override.
  Added private virtual functions for custom override
  of fallocate pread for io classes.
 2016-05-19 16:40:54 -07:00