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Re: C* in multiple AWS AZ's

Already running with Ec2.

My original thought was a new DC parallel to the current, and then decommission the other DC.

Also my data load is small right now.. I know small is relative term.. each node is carrying about 6GB..

So given the data size, would you go with parallel DC or let the new AZ carry a heavy load until the others are migrated over?
and then I think "repair" to cleanup the replications?

On Thu, Jun 28, 2018 at 10:09 AM, Rahul Singh <rahul.xavier.singh@xxxxxxxxx> wrote:
You don’t have to use EC2 snitch on AWS but if you have already started with it , it may put a node in a different DC.

If your data density won’t be ridiculous You could add 3 to different DC/ Region and then sync up. After the new DC is operational you can remove one at a time on the old DC and at the same time add to the new one.

On Jun 28, 2018, 9:03 AM -0500, Randy Lynn <rlynn@xxxxxxxxxxxx>, wrote:
I have a 6-node cluster I'm migrating to the new i3 types.
But at the same time I want to migrate to a different AZ.

What happens if I do the "running node replace method" with 1 node at a time moving to the new AZ. Meaning, I'll have temporarily;

5 nodes in AZ 1c
1 new node in AZ 1e.

I'll wash-rinse-repeat till all 6 are on the new machine type and in the new AZ.

Any thoughts about whether this gets weird with the Ec2Snitch and a RF 3?


Randy Lynn 

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