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https://issues.apache.org/jira/browse/HBASE-8849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13702941#comment-13702941
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stack commented on HBASE-8849:
------------------------------
Here is a suggestion. I'd think that an hfile would have blocks all of the
same codec? The codec used writing would be metadata on the hfile. You'd read
what codec to use before you started pulling in blocks. The file would be
wrriten w/ a codec that included mvcc or it could be written with a codec that
did not include mvcc?
> CellCodec should write and read the memstoreTS/mvccVersion
> ----------------------------------------------------------
>
> Key: HBASE-8849
> URL: https://issues.apache.org/jira/browse/HBASE-8849
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.95.1
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Labels: keyvalue
> Fix For: 0.98.0
>
> Attachments: HBASE-8849_1.patch, HBASE-8849_2.patch
>
>
> This JIRA is wrt discussion over in HBASE-8496.
> Cell interface and the corresponding CellCodec provides a new way of
> serializing the Keyvalues.
> Cell interface supports getMvccVersion() and the javadoc says it could be > 0
> if it exists or 0 otherwise.
> But we don't tend to write/read the memstoreTS/mvccVersion in the Cell codec.
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