Alex Yang e8180f9901 added public api to schedule flush/compaction, code to prevent race with db::open ... Summary: Fixes T8781168. Added a new function EnableAutoCompactions in db.h to be publicly avialable. This allows compaction to be re-enabled after disabling it via SetOptions Refactored code to set the dbptr earlier on in TransactionDB::Open and DB::Open Temporarily disable auto_compaction in TransactionDB::Open until dbptr is set to prevent race condition. Test Plan: Ran make all check verified fix on myrocks side: was able to reproduce the seg fault with ../tools/mysqltest.sh --mem --force rocksdb.drop_table method was to manually sleep the thread after DB::Open but before TransactionDB ptr was assigned in transaction_db_impl.cc: DB::Open(db_options, dbname, column_families_copy, handles, &db); clock_t goal = (60000 * 10) + clock(); while (goal > clock()); ...dbptr(aka rdb) gets assigned below verified my changes fixed the issue. Also added unit test 'ToggleAutoCompaction' in transaction_test.cc Reviewers: hermanlee4, anthony Reviewed By: anthony Subscribers: alex, dhruba Differential Revision: https://reviews.facebook.net/D51147		2015-12-03 22:59:44 -08:00
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rocksdb	added public api to schedule flush/compaction, code to prevent race with db::open	2015-12-03 22:59:44 -08:00