Reid Horuff 1b8a2e8fdd [rocksdb] Memtable Log Referencing and Prepared Batch Recovery ... Summary: This diff is built on top of WriteBatch modification: https://reviews.facebook.net/D54093 and adds the required functionality to rocksdb core necessary for rocksdb to support 2PC. modfication of DBImpl::WriteImpl() - added two arguments *uint64_t log_used = nullptr, uint64_t log_ref = 0; - *log_used is an output argument which will return the log number which the incoming batch was inserted into, 0 if no WAL insert took place. - log_ref is a supplied log_number which all memtables inserted into will reference after the batch insert takes place. This number will reside in 'FindMinPrepLogReferencedByMemTable()' until all Memtables insertinto have flushed. - Recovery/writepath is now aware of prepared batches and commit and rollback markers. Test Plan: There is currently no test on this diff. All testing of this functionality takes place in the Transaction layer/diff but I will add some testing. Reviewers: IslamAbdelRahman, sdong Subscribers: leveldb, santoshb, andrewkr, vasilep, dhruba, hermanlee4 Differential Revision: https://reviews.facebook.net/D56919		2016-05-10 14:06:07 -07:00
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rocksdb	[rocksdb] Memtable Log Referencing and Prepared Batch Recovery	2016-05-10 14:06:07 -07:00