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From oc tsdb <oc.t...@gmail.com>
Subject Re: Standby Namenode and Datanode coexistence
Date Fri, 10 Oct 2014 06:42:34 GMT
One more query we have -

Standby namenode should be running with all the services that are running
on active name node? or hadoop-hdfs-namenode is alone sufficient initially?

Thanks
oc.tsdb

On Fri, Oct 10, 2014 at 10:06 AM, oc tsdb <oc.tsdb@gmail.com> wrote:

> Thank you.We understood.
>
> Thanks
> oc.tsdb
>
> On Thu, Oct 9, 2014 at 11:22 PM, SF Hadoop <sfhadoop@gmail.com> wrote:
>
>> You can run any of the daemons on any machine you want, you just have to
>> be aware of the trade offs you are making with RAM allocation.
>>
>> I am hoping this is a DEV cluster.  This is definitely not a
>> configuration you would want to use in production.  If you are asking in
>> regards to a production cluster, the NNs should live apart from the
>> datanodes though it is perfectly fine to run the journal node and zookeeper
>> instances on the NNs.  But again, you should NEVER have the NN and DN on
>> the same machine (unless you are in a DEV cluster and experimenting).
>>
>>
>> On Thu, Oct 9, 2014 at 4:19 AM, oc tsdb <oc.tsdb@gmail.com> wrote:
>>
>>> Hi,
>>>
>>> We have cluster with 3 nodes (1 namenode + 2 datanodes).
>>> Cluster is running with hadoop 2.4.0 version.
>>>
>>> We would like to add High Availability(HA) to Namenode using the Quorum
>>> Journal Manager.
>>>
>>> As per the below link, we need two NN machines with same configuration.
>>>
>>>
>>> http://hadoop.apache.org/docs/r2.4.0/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html#Hardware
>>> resources
>>>
>>> Our query is:
>>>
>>> As we have existing cluster with 3 nodes (1 namenode + 2 datanodes), can
>>> we configure standby namenode on one of the datanodes? Will there be any
>>> issues if we run standby namenode and datanode together?
>>> Or we should add one more machine and configure it as standby namenode?
>>>
>>> Regarding Journal node, Can we run it on any machine (datanode and
>>> namenode)?
>>>
>>> Thanks in advance.
>>>
>>> Thanks
>>> oc.tsdb
>>>
>>>
>>>
>>>
>>
>

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