rocksdb/include/leveldb
Jim Paton 1036537c94 Add soft and hard rate limit support
Summary:
This diff adds support for both soft and hard rate limiting. The following changes are included:

1) Options.rate_limit is renamed to Options.hard_rate_limit.
2) Options.rate_limit_delay_milliseconds is renamed to Options.rate_limit_delay_max_milliseconds.
3) Options.soft_rate_limit is added.
4) If the maximum compaction score is > hard_rate_limit and rate_limit_delay_max_milliseconds == 0, then writes are delayed by 1 ms at a time until the max compaction score falls below hard_rate_limit.
5) If the max compaction score is > soft_rate_limit but <= hard_rate_limit, then writes are delayed by 0-1 ms depending on how close we are to hard_rate_limit.
6) Users can disable 4 by setting hard_rate_limit = 0. They can add a limit to the maximum amount of time waited by setting rate_limit_delay_max_milliseconds > 0. Thus, the old behavior can be preserved by setting soft_rate_limit = 0, which is the default.

Test Plan:
make -j32 check
./db_stress

Reviewers: dhruba, haobo, MarkCallaghan

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D12003
2013-08-05 15:43:49 -07:00
..
arena.h Make arena block size configurable 2013-07-31 12:42:23 -07:00
c.h Fix poor error on num_levels mismatch and few other minor improvements 2013-01-25 15:37:26 -08:00
cache.h Codemod NULL to nullptr 2013-02-28 18:04:58 -08:00
compaction_filter.h [RocksDB] Cleanup compaction filter to use a class interface, instead of function pointer and additional context pointer. 2013-05-13 14:06:10 -07:00
comparator.h A number of fixes: 2011-10-31 17:22:06 +00:00
db.h Expand KeyMayExist to return the proper value if it can be found in memory and also check block_cache 2013-08-01 09:07:46 -07:00
env.h [RocksDB] Option for incremental sync 2013-06-18 15:00:32 -07:00
filter_policy.h Added bloom filter support. 2012-04-17 08:36:46 -07:00
iterator.h A number of fixes: 2011-10-31 17:22:06 +00:00
ldb_tool.h [RocksDB] Expose LDB functioanality as a library call - clients can build their own LDB binary with additional options 2013-04-11 20:21:49 -07:00
memtablerep.h Make arena block size configurable 2013-07-31 12:42:23 -07:00
merge_operator.h [Rocksdb] Support Merge operation in rocksdb 2013-05-03 16:59:02 -07:00
options.h Add soft and hard rate limit support 2013-08-05 15:43:49 -07:00
slice.h manifest_dump: Add --hex=1 option 2012-12-16 08:58:28 -08:00
statistics.h Add stall counts to statistics 2013-07-29 10:34:23 -07:00
status.h [Rocksdb] Support Merge operation in rocksdb 2013-05-03 16:59:02 -07:00
table_builder.h Fix all the lint errors. 2012-11-28 17:18:41 -08:00
transaction_log_iterator.h Do not allow Transaction Log Iterator to fall ahead when writer is writing the same file 2013-03-06 14:05:53 -08:00
types.h GetUpdatesSince API to enable replication. 2012-12-07 11:42:13 -08:00
write_batch.h [RocksDB] Expose count for WriteBatch 2013-06-26 15:13:21 -07:00