omegaga c4e19b77e8 Add a read option to enable background purge when cleaning up iterators ... Summary: Add a read option `background_purge_on_iterator_cleanup` to avoid deleting files in foreground when destroying iterators. Instead, a job is scheduled in high priority queue and would be executed in a separate background thread. Test Plan: Add a variant of PurgeObsoleteFileTest. Turn on background purge option in the new test, and use sleeping task to ensure files are deleted in background. Reviewers: IslamAbdelRahman, sdong Reviewed By: IslamAbdelRahman Subscribers: andrewkr, dhruba Differential Revision: https://reviews.facebook.net/D59499		2016-06-21 18:41:23 -07:00
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rocksdb	Add a read option to enable background purge when cleaning up iterators	2016-06-21 18:41:23 -07:00