[HBASE-23326] Implement a ProcedureStore which stores procedures in a HRegion

• Type: Improvement
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 3.0.0-alpha-1, 2.3.0
• Component/s: proc-v2
• Hadoop Flags: Reviewed

Release Note

Use a region based procedure store to replace the old customized WAL based procedure store. The procedure data migration is done automatically during upgrading. After upgrading, the MasterProcWALs directory will be deleted and a new MasterProc directory will be created. And notice that a region will still write WAL so we still have WAL files and they will be moved to the oldWALs directory. The file name is mostly like a normal WAL file, and the only difference is that it is ended with "$masterproc$".

• Assignee: Duo Zhang
• Reporter: Duo Zhang
• Created: 21/Nov/19 13:22
• Updated: 23/May/20 04:23
• Resolved: 25/Dec/19 06:53

Description

So we can resue the code in HRegion for persisting the procedures, and also the optimized WAL implementation for better performance.

This requires we merge the hbase-procedure module to hbase-server, which is an anti-pattern as we make the hbase-server module more overloaded. But I think later we can first try to move the WAL stuff out.

Issue Links

• breaks: HBASE-23786 [Flakey Test] TestMasterNotCarryTable.testMasterMemStoreLAB
• relates to: HBASE-23617 Add a stress test tool for region based procedure store
• relates to: HBASE-23618 Add a tool to dump procedure info in the WAL file
• relates to: HBASE-23624 Add a tool to dump the procedure info in HFile
• relates to: HBASE-23652 Move the unsupported procedure type check before migrating to RegionProcedureStore
• relates to: HBASE-24408 Introduce a general 'local region' to store data on master
• links to: Design Doc
• links to: GitHub Pull Request #941

Sub-Tasks

• RegionProcedureStore missing cleaning of hfile archive: Resolved
• Document new RegionProcedureStore operation and migration: Resolved