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From Michael Dagaev <michael.dag...@gmail.com>
Subject Re: Backup Again
Date Wed, 04 Feb 2009 16:38:29 GMT
Thanks, Chris

BTW, is it possible to run a few HBase clients in a single JVM?

On Wed, Feb 4, 2009 at 6:28 PM, Chris K Wensel <chris@wensel.net> wrote:
> Hey Michael
>
> You could probably use Cascading to migrate data between HBase clusters.
> http://wiki.apache.org/hadoop/Hbase/Cascading
>
> But the code currently doesn't support multiple HBase cluster clients in a
> single JVM, but I'm sure it can be coded in quickly. (the code is hosted at
> github, so is easily cloned and patched).
>
> A benefit of using Cascading would be the ability to put in quality checks,
> or filter data very easily.
>
> I've already heard of users starting to migrate from HBase to a RDBMS using
> Cascading, and also between Hypertable and Aster Data. Hopefully those
> adapters will leak out for the rest of us to use.
>
> ckw
>
> On Feb 4, 2009, at 8:21 AM, Michael Dagaev wrote:
>
>> Hi, all
>>
>>   I read HBASE-974 and HBASE-643 mentioned on the list
>> but what do you think about copying tables from the production
>> to a backup Hbase cluster ? I guess we do need a big iron
>> for such a backup cluster.
>>
>> I understand that the copy can be implemented with MR
>> but for now we can implement it just as a simple sequential script,
>> which scans the tables of the production Hbase and writes the data
>> to the backup Hbase.
>>
>> Does it make sense?
>>
>> Thank you for your cooperation,
>> M.
>
> --
> Chris K Wensel
> chris@wensel.net
> http://www.cascading.org/
> http://www.scaleunlimited.com/
>
>

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