[HBASE-12259] Bring quorum based write ahead log into HBase

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 2.0.0
• Component/s: wal
• Assignee: Unassigned
• Reporter: Elliott Neil Clark
• Created: 15/Oct/14 00:15
• Updated: 17/Jun/22 17:37
• Resolved: 30/Jun/17 22:17

Description

HydraBase ( https://code.facebook.com/posts/321111638043166/hydrabase-the-evolution-of-hbase-facebook/ ) Facebook's implementation of HBase with Raft for consensus will be going open source shortly. We should pull in the parts of that fb-0.89 based implementation, and offer it as a feature in whatever next major release is next up. Right now the Hydrabase code base isn't ready to be released into the wild; it should be ready soon ( for some definition of soon).

Since Hydrabase is based upon 0.89 most of the code is not directly applicable. So lots of work will probably need to be done in a feature branch before a merge vote.

Is this something that's wanted?

Is there anything clean up that needs to be done before the log implementation is able to be replaced like this?

What's our story with upgrading to this? Are we ok with requiring down time ?