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Date: Wed, 12 Oct 2011 18:34:39 +0900
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Subject: Does Hbase automatically restore data when regionservers fail?
From: edward choi <mp2893@gmail.com>
To: common-user@hadoop.apache.org, user@hbase.apache.org
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Hi,

I am using CDH3U0 Hadoop and Hbase.

I know that HDFS automatically replicates data to multiple data nodes so
that when a couple of data nodes fail, the user won't lose any data.
I am currently using replication factor of 3.

Now in Hbase, I know there is some experimental replication service, but I
am not using it. I thought that since HDFS already does replication, Hbase
wouldn't need additional replication.
Am I right on this?

So my question would be:
Given that I am using HDFS replication and not using Hbase replication, if a
couple of regionservers fail, am I still able to access all the data I have
stored before?

I would appreciate any help.
Thanks.

Ed

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