fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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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		12 years ago
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arena.h	Make arena block size configurable	12 years ago
c.h	Fix poor error on num_levels mismatch and few other minor improvements	12 years ago
cache.h	Codemod NULL to nullptr	12 years ago
compaction_filter.h	[RocksDB] Cleanup compaction filter to use a class interface, instead of function pointer and additional context pointer.	12 years ago
comparator.h	A number of fixes:	13 years ago
db.h	Expand KeyMayExist to return the proper value if it can be found in memory and also check block_cache	12 years ago
env.h	[RocksDB] Option for incremental sync	12 years ago
filter_policy.h	Added bloom filter support.	13 years ago
iterator.h	A number of fixes:	13 years ago
ldb_tool.h	[RocksDB] Expose LDB functioanality as a library call - clients can build their own LDB binary with additional options	12 years ago
memtablerep.h	Make arena block size configurable	12 years ago
merge_operator.h	[Rocksdb] Support Merge operation in rocksdb	12 years ago
options.h	Add soft and hard rate limit support	12 years ago
slice.h	manifest_dump: Add --hex=1 option	12 years ago
statistics.h	Add stall counts to statistics	12 years ago
status.h	[Rocksdb] Support Merge operation in rocksdb	12 years ago
table_builder.h	Fix all the lint errors.	12 years ago
transaction_log_iterator.h	Do not allow Transaction Log Iterator to fall ahead when writer is writing the same file	12 years ago
types.h	GetUpdatesSince API to enable replication.	12 years ago
write_batch.h	[RocksDB] Expose count for WriteBatch	12 years ago