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https://issues.apache.org/jira/browse/HADOOP-1538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12511188
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Jim Kellerman commented on HADOOP-1538:
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User specified time stamps will be per-update, just as automatically generated
time stamps are.
If it is necessary for columns to have different user specified time stamps,
they will need to be done in separate updates. When we have batched updates
(HADOOP-1468), this should not entail that much overhead.
> Provide capability for client specified time stamps in HBase
> ------------------------------------------------------------
>
> Key: HADOOP-1538
> URL: https://issues.apache.org/jira/browse/HADOOP-1538
> Project: Hadoop
> Issue Type: New Feature
> Components: contrib/hbase
> Affects Versions: 0.14.0
> Reporter: Jim Kellerman
> Assignee: Jim Kellerman
> Priority: Minor
> Fix For: 0.14.0
>
>
> Currently all records stored in HBase are given a time stamp derived from the
> current time. It should be possible for the client to specify the time stamp.
> For example, if a web crawler is storing page contents in HBase, it should be
> able to set the time stamp to the crawl time which is not necessarily 'now'
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