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From Gagandeep Singh <gagandeep.si...@paxcel.net>
Subject Re: Data loss due to region server failure
Date Thu, 26 Aug 2010 14:22:51 GMT
HBase - 0.20.5
Hadoop - 0.20.2

Thanks,
Gagan



On Thu, Aug 26, 2010 at 7:11 PM, Jean-Daniel Cryans <jdcryans@apache.org>wrote:

> Hadoop and HBase version?
>
> J-D
>
> On Aug 26, 2010 5:36 AM, "Gagandeep Singh" <gagandeep.singh@paxcel.net>
> wrote:
>
> Hi Group,
>
> I am checking HBase/HDFS fail over. I am inserting 1M records from my HBase
> client application. I am clubbing my Put operation such that 10 records get
> added into the List<Put> and then I call the table.put(). I have not
> modified the default setting of Put operation which means all data is
> written in WAL and in case of server failure my data should not be lost.
>
> But I noticed somewhat strange behavior, while adding records if I kill my
> Region Server then my application waits till the time region data is moved
> to another region. But I noticed while doing so all my data is lost and my
> table is emptied.
>
> Could you help me understand the behavior. Is there some kind of Cache also
> involved while writing because of which my data is lost.
>
>
> Thanks,
> Gagan
>

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