On Apr 29, 2016 11:46 PM, Gregory Farnum <gfarnum@xxxxxxxxxx> wrote: > > On Friday, April 29, 2016, Edward Huyer <erhvks@
On Friday, April 29, 2016, Edward Huyer <erhvks@xxxxxxx> wrote:
It's important not to use the kernel rbd mount on a machine hosting OSDs because if it runs like on memory and tries to flush out shift pages, but the OSD needs to allocate memory to handle the write... You have a problem!
This is more of a "why" than a "can I/should I" question.
The Ceph block device quickstart says (if I interpret it correctly) not to use a physical machine as both a Ceph RBD client and a node for hosting OSDs or other Ceph services.
Is this interpretation correct? If so, what is the reasoning? If not, what is it actually saying?
Hosting all userspace processes shouldn't be a problem, though, apart from the usual resource contention problems of running hyper-converged.
-Greg
Thanks in advance.
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