Thanks Mr Konstantin and Martin,
So with 200TB Cluster, the most afforadable choice is adding MON to OSD hosts, and preparing enough CPU, RAM for MON services and Storage for levelDB.
Vào Th 2, 17 thg 12, 2018 vào lúc 16:55 Martin Verges <martin.verges@xxxxxxxx> đã viết:
Hello,
we do not see a problem in a small cluster having 3 MON on OSD hosts.
However we do suggest to use 5 MON's.
Near every customers of us does this without a problem! Please just
make sure to have enough cpu/ram/disk available.
So:
1. No not necessary, only if you want to spend more money than required.
2. Maybe think of it when your cluster becomes >500, maybe 1k OSDs or
simply if the cluster design would be easier with dedicated servers.
Hint: Our training's cover a Ceph cluster planing session that covers
exactly such topics. See https://croit.io/training.
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Am Mo., 17. Dez. 2018 um 10:10 Uhr schrieb Sam Huracan
<nowitzki.sammy@xxxxxxxxx>:
>
> Hi everybody,
>
> We've runned a 50TB Cluster with 3 MON services on the same nodes with OSDs.
> We are planning to upgrade to 200TB, I have 2 questions:
> 1. Should we separate MON services to dedicated hosts?
> 2. From your experiences, how size of cluster we shoud consider to put MON on dedicated hosts?
>
>
> Thanks in advance.
>
>
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