Mike Kolupaev d18dd2c41f Abort compactions more reliably when closing DB ... Summary: DB shutdown aborts running compactions by setting an atomic shutting_down=true that CompactionJob periodically checks. Without this PR it checks it before processing every _output_ value. If compaction filter filters everything out, the compaction is uninterruptible. This PR adds checks for shutting_down on every _input_ value (in CompactionIterator and MergeHelper). There's also some minor code cleanup along the way. Closes https://github.com/facebook/rocksdb/pull/1639 Differential Revision: D4306571 Pulled By: yiwu-arbug fbshipit-source-id: f050890		2017-01-11 15:09:21 -08:00
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rocksdb	Abort compactions more reliably when closing DB	2017-01-11 15:09:21 -08:00