jens
October 24, 2015, 9:59pm
1
Continuing the discussion from CBlite local database size considerations on devices :
Still about scaling/sizing…but not about bandwith. If in a few months, i want to upgrade my 3 current nodes (2 vCPUs , 2 GB) to 3 nodes of another configuration (8vCPU, 32 GB, SSD drives).
Can i use the same method as described in your documentation : Online upgrade with swap rebalance ?Couchbase SDKs
So basically add 1 of the new servers to my cluster, put all the data on it, remove the 3 olds nodes from the cluster, then add the 2 others “new” servers to the cluster.
If yes, can i do this if my 3 old servers are under Couchbase 3.0 and the new under 4.0 ?
Moving this to Couchbase Server forum where it’s more likely that someone who knows the answer will see it.
daves
October 27, 2015, 2:32pm
3
I upgraded a 3.1 cluster to a 4.0 cluster using this method, and there was no issue with mixed version types whilst performing the rebalance.
I also tested the situation of running an upgrade on another cluster whilst it was running. That also worked - it just dropped the node for a few seconds whilst the upgrade happened. Not ideal when running in production, but it works if you need it to.
daves:
I upgraded a 3.1 cluster to a 4.0 cluster using this method, and there was no issue with mixed version types whilst performing the rebalance.
I also tested the situation of running an upgrade on another cluster whilst it was running. That also worked - it just dropped the node for a few seconds whilst the upgrade happened. Not ideal when running in production, but it works if you need it to.
Okay thanks so actually, i can both upgrade my server’s hardware configuration and capabilities, at the same time i upgrade CouchBase…
