Gauresh Rane ad789e4e0d Adding a method for memtable class for memtable getting flushed. (#4304) ... Summary: Memtables are selected for flushing by the flush job. Currently we have listener which is invoked when memtables for a column family are flushed. That listener does not indicate which memtable was flushed in the notification. If clients want to know if particular data in the memtable was retired, there is no straight forward way to know this. This method will help users who implement memtablerep factory and extend interface for memtablerep, to know if the data in the memtable was retired. Another option that was tried, was to depend on memtable destructor to be called after flush to mark that data was persisted. This works all the time but sometimes there can huge delays between actual flush happening and memtable getting destroyed. Hence, if anyone who is waiting for data to persist will have to wait that longer. It is expected that anyone who is implementing this method to have return quickly as it blocks RocksDB. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4304 Reviewed By: riversand963 Differential Revision: D9472312 Pulled By: gdrane fbshipit-source-id: 8e693308dee749586af3a4c5d4fcf1fa5276ea4d		2018-08-23 17:14:25 -07:00
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rocksdb	Adding a method for memtable class for memtable getting flushed. (#4304)	2018-08-23 17:14:25 -07:00