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MapReduce, mail # user - Re: how to add JournalNodes


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Re: how to add JournalNodes
Harsh J 2013-07-12, 08:08
You need to restart your NameNodes to get them to use the new QJM
5-host-set configs, and I think you can do that without downtime if
you're already in HA mode by restarting one NN at a time.

To add new JNs first though, you will currently have to rsync their
directory from a good JN to get them into the cluster (i.e. rsync the
data from a good one before you start the new JNs). They will not
auto-join otherwise.

On Fri, Jul 12, 2013 at 12:57 PM, lei liu <[EMAIL PROTECTED]> wrote:
> I use QJM for HA in hadoop2.0,  now  there are three JournalNodes in HDFS
> cluster, I want to add two new JournalNodes to HDFS cluster, how to do it?
> Do I need to restart HDFS cluster?
>
>
> Thanks,
>
> LiuLei

--
Harsh J