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From Prem Yadav <>
Subject Re: Need advice for multi DC C* setup
Date Sun, 16 Aug 2015 08:46:51 GMT
I meant the existing nodes must be in the default VPC if you did not create
In any case, you can use the VPC peering.

On Sun, Aug 16, 2015 at 5:34 AM, John Wong <> wrote:

> > The EC2 nodes must be in the default VPC.
> Did you really mean the default VPC created by AWS or just a VPC? Because
> I would be very surprise default VPC must be used.
> On Sat, Aug 15, 2015 at 2:50 AM, Prem Yadav <> wrote:
>> The EC2 nodes must be in the default VPC.
>> create a ring in the VPC in region B. Use VPC peering to connect the
>> default and the region B VPC.
>> The two rings should join the existing one. Alter the replication
>> strategy to network replication so that the data is replicated to the new
>> rings. Repair the keyspaces.
>> Once it is done, you can decommission the existing ring.
>> For spark,if you are using datastax version, it comes with spark. You
>> just need to change a config and spark starts along with cassandra. A
>> separate ring is advised for analytics stuff.
>> On Sat, Aug 15, 2015 at 1:10 AM, Aiman Parvaiz <>
>> wrote:
>>> Hi all
>>> We are planning to move C* from EC2 (region A) to VPC in region B. I
>>> will enumerate our goals so that you guys can advice me keeping in mind the
>>> bigger picture.
>>> Goals:
>>> - Move to VPC is another region.
>>> - Enable Vnodes.
>>> - Bump up RF to 3.
>>> - Ability to have a spark cluster.
>>> I know this is a LOT of work and I know this all might not be possible
>>> in one go.
>>> Existing cluster in EC2 is using RF=2, simple snitch and simple
>>> replication.
>>> I am not sure what would be the best way to approach this task. So
>>> please anyone who has done this and would like to share anything I would
>>> really appreciate the effort.
>>> Thanks

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