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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-10241) implement mvcc-consistent scanners (across recovery)
Date Thu, 26 Dec 2013 18:41:50 GMT
Sergey Shelukhin created HBASE-10241:

             Summary: implement mvcc-consistent scanners (across recovery)
                 Key: HBASE-10241
                 URL: https://issues.apache.org/jira/browse/HBASE-10241
             Project: HBase
          Issue Type: New Feature
          Components: HFile, regionserver, Scanners
    Affects Versions: 0.99.0
            Reporter: Sergey Shelukhin
            Assignee: Sergey Shelukhin

Scanners currently use mvcc for consistency. However, mvcc is lost on server restart, or even
a region move. This JIRA is to enable the scanners to transfer mvcc (or seqId, or some other
number, see HBASE-8763) between servers. First, client scanner needs to get and store the
readpoint. Second, mvcc needs to be preserved in WAL. Third, the mvcc needs to be stored in
store files per KV and discarded when not needed.

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