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From sai krishnam raju potturi <pskraj...@gmail.com>
Subject Re: Bootstrapping multiple cassandra nodes simultaneously in existing dc
Date Sun, 11 Sep 2016 21:17:00 GMT
Make sure there is no spike in the load-avg on the existing nodes, as that
might affect your application read request latencies.

On Sun, Sep 11, 2016, 17:10 Jens Rantil <jens.rantil@tink.se> wrote:

> Hi Bhuvan,
>
> I have done such expansion multiple times and can really recommend
> bootstrapping a new DC and pointing your clients to it. The process is so
> much faster and the documentation you referred to has worked out fine for
> me.
>
> Cheers,
> Jens
>
>
> On Sunday, September 11, 2016, Bhuvan Rawal <bhu1rawal@gmail.com> wrote:
>
>> Hi,
>>
>> We are running Cassandra 3.6 and want to bump up Cassandra nodes in an
>> existing datacenter from 3 to 12 (plan to move to r3.xlarge machines to
>> leverage more memory instead of m4.2xlarge). Bootstrapping a node would
>> take 7-8 hours.
>>
>> If this activity is performed serially then it will take 5-6 days. I had
>> a look at CASSANDRA-7069
>> <https://issues.apache.org/jira/browse/CASSANDRA-7069> and a bit of
>> discussion in the past at -
>> http://grokbase.com/t/cassandra/user/147gcqvybg/adding-more-nodes-into-the-cluster.
>> Wanted to know if the limitation is still applicable and race condition
>> could occur in 3.6 version.
>>
>> If this is not the case can we add a new datacenter as mentioned here
>> opsAddDCToCluster
>> <https://docs.datastax.com/en/cassandra/3.x/cassandra/operations/opsAddDCToCluster.html>
and
>> bootstrap multiple nodes simultaneously by keeping auto_bootstrap false in
>> cassandra.yaml and rebuilding nodes simultaneously in the new dc?
>>
>>
>> Thanks & Regards,
>> Bhuvan
>>
>
>
> --
> Jens Rantil
> Backend engineer
> Tink AB
>
> Email: jens.rantil@tink.se
> Phone: +46 708 84 18 32
> Web: www.tink.se
>
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