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From Prem Yadav <ipremya...@gmail.com>
Subject Re: Need advice for multi DC C* setup
Date Sat, 15 Aug 2015 06:50:17 GMT
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 <aiman@flipagram.com> 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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