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Remove incorrect comment 

Summary:
We actually create individual compaction filter from compaction filter factory per sub-compaction in `CompactionJob::ProcessKeyValueCompaction`: https://github.com/facebook/rocksdb/blob/master/db/compaction_job.cc#L742
The comment seems incorrect.
Closes https://github.com/facebook/rocksdb/pull/3288

Differential Revision: D6598455

Pulled By: yiwu-arbug

fbshipit-source-id: a6bc059a9103b87a73ae6ec4bb01ca33f5d48cf5
This commit is contained in:
Yi Wu 2017-12-18 17:48:41 -08:00 committed by Facebook Github Bot
parent 0faa026db6
commit 2190e96727
1 changed files with 0 additions and 4 deletions
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4
include/rocksdb/compaction_filter.h
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@ -94,10 +94,6 @@ class CompactionFilter {
// be used by a single thread that is doing the compaction run, and this
// call does not need to be thread-safe. However, multiple filters may be
// in existence and operating concurrently.
//
// The last paragraph is not true if you set max_subcompactions to more than
// 1. In that case, subcompaction from multiple threads may call a single
// CompactionFilter concurrently.
virtual bool Filter(int level, const Slice& key, const Slice& existing_value,
std::string* new_value, bool* value_changed) const {
return false;