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From "Jean-Daniel Cryans" <jdcry...@gmail.com>
Subject Re: Building an Hadoop & Hbase Cluster
Date Sun, 14 Dec 2008 17:22:03 GMT
It would be interesting to see how HBase would react to a loss of the NN
when trying to shutdown HBase in the following minutes, but I think it would
be better to try than just losing the two at the same time.

J-D

On Sun, Dec 14, 2008 at 12:13 PM, Wesley Chow <wes.chow@s7labs.com> wrote:

>
>  3. Can I run the NameNode and the HBaseMaster on the same machine?
>>>
>>
>>
>  3. No, that would make 2 SPOFs at the same place. (but we are currently
>> integrating Zookeeper in HBase so the HMaster SPOF will be fixed hopefully
>> in 0.20)
>>
>
> Isn't it the case that if the NN goes down then HBase doesn't function
> properly? If so, then from the perspective of HBase reliability, you'd want
> to have the HBaseMaster on the same machine as NN, because that would make a
> single machine a point of failure, whereas having them on separate machines
> would mean you'd have 2 machines that are each single point of failures.
>
>
> Wes
>
>

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