Does it affect the put, get, query operation when add or remove a node?

[Justin Ji <bi...@foxmail.com>]

Hi -

When I add or remove a server node, does the performance of the cluster will
be affected?  become slower or even stop?



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Re: Does it affect the put, get, query operation when add or remove a node?

["Maxim.Pudov" <pu...@gmail.com>]

There is no simple answer to this question. It depends on configuration of
your cluster and load profile.

Cluster won't stop in any case, because it is designed to support scaling,
but the performance could be affected.

If you use partitioned caches (default cache configuration) then adding or
removing a node triggers partition map exchange, which is basically
redistribution of data for the performance sake. This is not stop of the
world operation, but if your cluster is under the heavy load then you can
see a performance drop.
https://cwiki.apache.org/confluence/display/IGNITE/%28Partition+Map%29+Exchange+-+under+the+hood

If you use replicated caches, then removing a node only affects throughput,
because you have less workers for executing your requests.



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