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From Harshit Mathur <mathursh...@gmail.com>
Subject Re: How will Hadoop handle it when a datanode server with total hardware failure?
Date Wed, 17 Dec 2014 07:24:30 GMT
Hi Arthur,

In HDFS there will be block level replication, In case of total failure of
a datanode the lost blocks will get under replicated hence the namenode
will create copy of these under replicated blocks on some other datanode.

BR,
Harshit

On Wed, Dec 17, 2014 at 11:35 AM, Arthur.hk.chan@gmail.com <
arthur.hk.chan@gmail.com> wrote:
>
> Hi,
>
> If each of  my datanode servers has 8 hard disks (a 10-node cluster) and I
> use the default replication factor of 3, how will Hadoop handle it when a
> datanode with total hardware failure suddenly?
>
> Regards
> Arthur
>



-- 
Harshit Mathur

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