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https://issues.apache.org/jira/browse/HBASE-5991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13421070#comment-13421070
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Alex Feinberg commented on HBASE-5991:
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Hi Jesse,
1) Re: progress -- I have another issue I am working on this week (related to
log splitting) -- but let me see if I can shuffle things around and get this
finished this week (I'll let you know an ETA): I'll let you know (at the
latest) sometime tomorrow (hopefully earlier) if I can get this done this week.
If not, I'll let you know so you could work on this.
2) Re: locking the table to read only -- Sequential locks let us introduce
read-write lock for metadata, so I think it will also be possible to introduce
a write lock for data itself. Good suggestion.
Thanks,
- Alex
> Introduce sequential ZNode based read/write locks
> --------------------------------------------------
>
> Key: HBASE-5991
> URL: https://issues.apache.org/jira/browse/HBASE-5991
> Project: HBase
> Issue Type: Improvement
> Reporter: Alex Feinberg
> Assignee: Alex Feinberg
>
> This is a continuation of HBASE-5494:
> Currently table-level write locks have been implemented using non-sequential
> ZNodes as part of HBASE-5494 and committed to 89-fb branch. This issue is to
> track converting the table-level locks to sequential ZNodes and supporting
> read-write locks, as to solve the issue of preventing schema changes during
> region splits or merges.
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