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docker-library / cassandra

Docker Official Image packaging for Cassandra
Apache License 2.0
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Could numactl tool be added to the Dockerfile? #185

Closed kangshan0910 closed 5 years ago

kangshan0910 commented 5 years ago

Hi, There is no numactl tool in the current image, can it be added? We need it when we want to start multiple instances, as on the server side, running Cassandra with CPU affinity gives better performance when running multiple instances. With numactl each instance can be pinned to distinct CPU.

yosifkit commented 5 years ago

Have you tried cpuset?

https://stackoverflow.com/questions/42783744/docker-compose-shared-cpus

tianon commented 5 years ago

I think https://github.com/apache/cassandra/blob/18bcda2d4c2eba7370a0b21f33eed37cb730bbb3/bin/cassandra#L90-L100 is a pretty strong justification for adding numactl to the image. :sweat_smile:

(and has been in since like Cassandra 1.0: https://github.com/apache/cassandra/commit/604c0e87dc67fa65f6904ef9a98a029c9f2f865a; https://issues.apache.org/jira/browse/CASSANDRA-2594)