Adding new DC

[Shaurya Gupta <sh...@gmail.com>]

Hi

Which of the below approaches should be followed to add a new DC to an
existing DC -

Approach 1-

   1. Create a new DC say DC2 of say 3 nodes while booting the first node
   as seed=true and subsequently using it as seed for the remaining two nodes.
   2. Now restart all the 3 nodes while providing the seed list from the
   already running DC, say DC1.
   3. Change of RFs of required keyspaces in DC1 to mention DC2.


Approach 2-

   1. Boot a new node with DC=DC2 and seed=false while providing seed list
   from DC1.
   2. Similarly, boot remaining two nodes while providing DC=DC2 and seed
   list from DC2 (node booted in previous step) & DC1.
   3. Change of RFs of required keyspaces in DC1 to mention DC2.


If someone could point to some already available documentation then that
would be great too.
-- 
Shaurya Gupta

Re: Adding new DC

[Shaurya Gupta <sh...@gmail.com>]

Thanks Erick!

On Thu, Jul 22, 2021 at 2:29 PM Erick Ramirez <er...@datastax.com>
wrote:

> I wouldn't use either of the steps you outlined. Neither of them are
> correct.
>
> Follow the procedure documented here instead --
> https://docs.datastax.com/en/cassandra-oss/3.x/cassandra/operations/opsAddDCToCluster.html.
> Cheers!
>


-- 
Shaurya Gupta

Re: Adding new DC

[Erick Ramirez <er...@datastax.com>]

I wouldn't use either of the steps you outlined. Neither of them are
correct.

Follow the procedure documented here instead --
https://docs.datastax.com/en/cassandra-oss/3.x/cassandra/operations/opsAddDCToCluster.html.
Cheers!