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Re: Options to replace hardware of the cluster


For no downtime and no lost data, I would make a new DC in the same cluster, and wait for the data / MVs to stream over. Otherwise, the best way is to snapshot everything and bring up the nodes all at once. 
On Jun 14, 2018, 4:11 AM -0400, Christian Lorenz <Christian.Lorenz@xxxxxxxxxxxx>, wrote:

Hi,

 

we need to move our existing cassandra cluster to new hardware nodes. Currently the cluster size is 8 members, they need to be moved to 8 new machines. Cassandra version in use is 3.11.1.  Unfortunately we use materialized views in production. I know that they have been marked retroactively as experimental.

What is a good way to move to the new machines? One-by-One, or setup a new cluster as a separate DC? The move should be done without downtime of the application.

 

Do you have some advice for this kind of maintenance task?

 

Kind regards,

Christian