Today I need to bring that data center back in. It is not 2-3 days out dated.
I have two options:
1) Treat this as a new data center and let the nodes sync from scratch, or
2) Bring the nodes back up with all the data in place and do a repair.
As long as the nodes were down for less than gc_grace_seconds i would bring the
old ones back with their data and run repair.
If possible avoid having the application read from them until it’s complete.
There are 4 nodes in both data centers, with RF=2.
I’d recommend moving to RF 3 if you use QUORUM.
Cheers
-
Aaron Morton
New Zealand
@aaronmorton
Co-Founder Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 26/10/2013, at 2:33 am, Oleg Dulin oleg.du...@gmail.com wrote:
I am using Cassandra 1.1.11 and plan on upgrading soon, but in the meantime
here is what happened.
I couldn't run repairs because of a slow WAN pipe, so i removed the second
data center from the cluster.
Today I need to bring that data center back in. It is not 2-3 days out dated.
I have two options:
1) Treat this as a new data center and let the nodes sync from scratch, or
2) Bring the nodes back up with all the data in place and do a repair.
We are talking about 30-40Gigs per node. There are 4 nodes in both data
centers, with RF=2.
--
Regards,
Oleg Dulin
http://www.olegdulin.com
