The docs is providing the following information:
The smallest CRUSH unit type that Ceph will notautomatically mark out. For 
instance, if set to host and if all OSDs of a host are down, Ceph will not 
automatically mark out these OSDs.

But what does it exactly mean? Anyone who can explain it? Thanks!

> Op 21 aug. 2017 om 17:56 heeft Scottix <[email protected]> het volgende 
> geschreven:
> 
> Great to hear.
> 
> Best
> 
>> On Mon, Aug 21, 2017 at 8:54 AM John Spray <[email protected]> wrote:
>> On Mon, Aug 21, 2017 at 4:34 PM, Scottix <[email protected]> wrote:
>> > I don't want to hijack another thread so here is my question.
>> > I just learned about this option from another thread and from my
>> > understanding with our Ceph cluster that we have setup, the default value 
>> > is
>> > not good. Which is "rack" and I should have it on "host".
>> > Which comes to my point why is it set to rack? To be on the safer side
>> > wouldn't the option make more sense as host as default? Then if you are 
>> > rack
>> > aware then you can change the default.
>> 
>> Yes!
>> 
>> As it happens, we (Sage was in the room, not sure who else) talked
>> about this recently, and the idea was to make the default conditional
>> depending on system size.  So for smallish systems, we would set it to
>> host, and on larger systems it would be rack.
>> 
>> John
>> 
>> >
>> > Best,
>> > Scott
>> >
>> >
>> > _______________________________________________
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>> > [email protected]
>> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>> >
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