What is the best practice for planned maintenance?

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amitmund_177224 asked Aug 22, '19 Erick Ramirez answered Aug 23, '19

Hi All,

lets say I need to update my system RAM and for some time I need to take one of the cluster node out of rotation

what are the *** best *** options to do the same for the same

for now, I do

nodetool drain

and later stop the service and

from other cluster node: check for host id

and later do: nodetool removenode host_id

is that good enough ?

maintenance

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Answer 1 · 2019-08-23T00:13:56Z

Erick Ramirez answered Aug 23, '19

@amitmund_177224 you don't need to decommission a node to perform that type of work. I recommend:

Run nodetool drain to flush all memtables to disk. This means there will be no commit logs to replay on startup.
Stop DSE.
Perform maintenance.
Start DSE.

Cheers!

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