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From Stack <st...@duboce.net>
Subject Re: Even After removing the hdfs blocks from Data Nodes, I could still able to query the table.
Date Mon, 27 Dec 2010 16:43:54 GMT
On Fri, Dec 24, 2010 at 6:15 AM, Mohit <mohitsikri@huawei.com> wrote:
> So I restarted the HBase cluster to clear off the cache, and from the shell
> mode , I performed scan 'temp' operation and strangely I could able to fetch
> the data whatever I have deleted and also the data file was present under
> table directory.
>
>
>
> I could able to see the same data , say by doing
>
> ./hadoop fs -cat /hbase/temp/123456/colfam/4588349323987497
>

When you stopped HBase, it flushed what was in memory to write
4588349323987497?  Is that what happened?  Check the logs for a flush
event on shutdown.  Or, yes, if you killed the regionserver, replay of
WAL log reconstituted the data.

St.Ack

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