Re: How To Scale Ceph for Large Numbers of Clients?

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Quoting Zack Brenton (zack@xxxxxxxxxxxx):
> Types of devices:
> We run our Ceph pods on 3 AWS i3.2xlarge nodes. We're running 3 OSDs, 3
> Mons, and 2 MDS pods (1 active, 1 standby-replay). Currently, each pod runs
> with the following resources:
> - osds: 2 CPU, 6Gi RAM, 1.7Ti NVMe disk
> - mds:  3 CPU, 24Gi RAM
> - mons: 500m (.5) CPU, 1Gi RAM

Hmm, 6 GiB of RAM is not a whole lot. Especially if you are going to
increase the amount of OSDs (partitions) like Patrick suggested. By
default it will take 4 GiB per OSD ... Make sure you set the
"osd_memory_target" parameter accordingly [1].

Gr. Stefan

[1]:
http://docs.ceph.com/docs/master/rados/configuration/bluestore-config-ref/?highlight=osd%20memory%20target


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