Commit Graph

12 Commits

Author SHA1 Message Date
Andrew Kryczka
7c80a6d7d1 Statistic for how often rate limiter is drained
Summary:
This is the metric I plan to use for adaptive rate limiting. The statistics are updated only if the rate limiter is drained by flush or compaction. I believe (but am not certain) that this is the normal case.

The Statistics object is passed in RateLimiter::Request() to avoid requiring changes to client code, which would've been necessary if we passed it in the RateLimiter constructor.
Closes https://github.com/facebook/rocksdb/pull/1946

Differential Revision: D4646489

Pulled By: ajkr

fbshipit-source-id: d8e0161
2017-03-02 17:54:15 -08:00
Xiaofei Du
7106a994fe Use monotonic time points in write_controller.cc and rate_limiter.cc
Summary:
NowMicros() provides non-monotonic time. When wall clock is
synchronized or changed, the non-monotonicity time points will affect write rate
controllers. This patch changes write_controller.cc and rate_limiter.cc to use
monotonic time points.
Closes https://github.com/facebook/rocksdb/pull/1865

Differential Revision: D4561732

Pulled By: siying

fbshipit-source-id: 95ece62
2017-02-14 18:24:24 -08:00
sdong
f62fbd2c85 Handle overflow case of rate limiter's paramters
Summary: When rate_bytes_per_sec * refill_period_us_ overflows, the actual limited rate is very low. Handle this case so the rate will be large.

Test Plan: Add a unit test for it.

Reviewers: IslamAbdelRahman, andrewkr

Reviewed By: andrewkr

Subscribers: yiwu, lightmark, leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D58929
2016-05-27 16:15:28 -07:00
Jay Edgar
b345b36620 Add a minimum value for the refill bytes per period value
Summary: If the user specified a small enough value for the rate limiter's bytes per second, the calculation for the number of refill bytes per period could become zero which would effectively cause the server to hang forever.

Test Plan: Existing tests

Reviewers: sdong, yhchiang, igor

Reviewed By: igor

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56631
2016-04-13 09:01:42 -07:00
Baraa Hamodi
21e95811d1 Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
Dmitri Smirnov
aca403d2b5 Fix another rebase problems. 2015-12-11 17:33:40 -08:00
Dmitri Smirnov
236fe21c92 Enable MS compiler warning c4244.
Mostly due to the fact that there are differences in sizes of int,long
  on 64 bit systems vs GNU.
2015-12-11 16:47:34 -08:00
Paul Marinescu
50dc5f0c5a Replace BackupRateLimiter with GenericRateLimiter
Summary: BackupRateLimiter removed and uses replaced with the existing GenericRateLimiter

Test Plan:
make all check

make clean
USE_CLANG=1 make all

make clean
OPT=-DROCKSDB_LITE make release

Reviewers: leveldb, igor

Reviewed By: igor

Subscribers: igor, dhruba

Differential Revision: https://reviews.facebook.net/D46095
2015-09-03 17:00:09 -07:00
Dmitri Smirnov
18285c1e2f Windows Port from Microsoft
Summary: Make RocksDb build and run on Windows to be functionally
 complete and performant. All existing test cases run with no
 regressions. Performance numbers are in the pull-request.

 Test plan: make all of the existing unit tests pass, obtain perf numbers.

 Co-authored-by: Praveen Rao praveensinghrao@outlook.com
 Co-authored-by: Sherlock Huang baihan.huang@gmail.com
 Co-authored-by: Alex Zinoviev alexander.zinoviev@me.com
 Co-authored-by: Dmitri Smirnov dmitrism@microsoft.com
2015-07-01 16:13:56 -07:00
Igor Canadi
51301b869f Enable dynamic changing of rate limiter's bytes_per_second
Summary: This feature is going to be useful for mongodb+rocksdb. I'll expose it through mongo's API.

Test Plan: added new unit test. also will run TSAN on the new unit test

Reviewers: meyering, sdong

Reviewed By: meyering, sdong

Subscribers: meyering, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D35307
2015-03-18 15:35:55 -07:00
Lei Jin
d650612c4c expose RateLimiter definition
Summary:
User gets undefinied error since the definition is not exposed.
Also re-enable the db test with only upper bound check

Test Plan: db_test, rate_limit_test

Reviewers: igor, yhchiang, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D20403
2014-07-25 15:17:06 -07:00
Lei Jin
5ef1ba7ff5 generic rate limiter
Summary:
A generic rate limiter that can be shared by threads and rocksdb
instances. Will use this to smooth out write traffic generated by
compaction and flush. This will help us get better p99 behavior on flash
storage.

Test Plan:
unit test output
==== Test RateLimiterTest.Rate
request size [1 - 1023], limit 10 KB/sec, actual rate: 10.374969 KB/sec, elapsed 2002265
request size [1 - 2047], limit 20 KB/sec, actual rate: 20.771242 KB/sec, elapsed 2002139
request size [1 - 4095], limit 40 KB/sec, actual rate: 41.285299 KB/sec, elapsed 2202424
request size [1 - 8191], limit 80 KB/sec, actual rate: 81.371605 KB/sec, elapsed 2402558
request size [1 - 16383], limit 160 KB/sec, actual rate: 162.541268 KB/sec, elapsed 3303500

Reviewers: yhchiang, igor, sdong

Reviewed By: sdong

Subscribers: leveldb

Differential Revision: https://reviews.facebook.net/D19359
2014-07-08 11:41:57 -07:00