You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hbase.apache.org by "Enis Soztutar (JIRA)" <ji...@apache.org> on 2013/06/18 23:52:20 UTC
[jira] [Created] (HBASE-8763) [BRAINSTORM] Combine MVCC and SeqId
Enis Soztutar created HBASE-8763:
------------------------------------
Summary: [BRAINSTORM] Combine MVCC and SeqId
Key: HBASE-8763
URL: https://issues.apache.org/jira/browse/HBASE-8763
Project: HBase
Issue Type: Improvement
Components: regionserver
Reporter: Enis Soztutar
Fix For: 0.98.0
HBASE-8701 and a lot of recent issues include good discussions about mvcc + seqId semantics. It seems that having mvcc and the seqId complicates the comparator semantics a lot in regards to flush + WAL replay + compactions + delete markers and out of order puts.
Thinking more about it I don't think we need a MVCC write number which is different than the seqId. We can keep the MVCC semantics, read point and smallest read points intact, but combine mvcc write number and seqId. This will allow cleaner semantics + implementation + smaller data files.
We can do some brainstorming for 0.98. We still have to verify that this would be semantically correct, it should be so by my current understanding.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira