Re: v9.2.0 Infernalis released

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Oops, sorry Dan, I would like to send my message to the list.
Sorry.

> On Mon, Nov 9, 2015 at 11:55 AM, Francois Lafont
>>
>> 1. Ok, so, the rank of my monitors are 0, 1, 2 but the its ID are 1, 2, 3
>> (ID chosen by himself because the hosts are called ceph01, ceph02 and
>> ceph03 and these ID seemed to me a good idea). Is it correct ?
>>
>> 2. And, if I understand well, with this command `ceph tell mon.$thing version`
>> $thing is in fact the rank of the monitor, correct?
>>
>> 3. But with `ceph tell osd.$thing version`, $thing is the ID of the osd, correct?
>>
>> 4. Why not. But in this case, why with the command `ceph tell mon.* version`,
>> "*" is expanded to the ID of my monitors (ie 1, 2, 3) and not to the ranks ?
>> It seems to me not logical? Am I wrong?
>>
>> But Dan, in your case (monitors have the ID `hostname -s`), the command
>> `ceph tell mon.* version` doesn't work at all, no? Because "*" is expanded
>> to `hostname -s` which doesn't match any rank value, no?
>>
>> Sorry for all these questions, I understand the difference between ID
>> and rank for monitors, but currently I don't understand:
>>
>> - which is $thing (rank or ID?) in the command `ceph tell mon.$thing version`?
>> - in what "*" is expanded (ranks or IDs?) in the command `ceph tell mon.* version`?
>>
> 
> Here's the behaviour on hammer. I don't know if this changed in infernalis:
> 
> # ceph mon dump
> ...
> 0: 128.142.xxx:6790/0 mon.p01001532077xxx
> 1: 128.142.yyy:6790/0 mon.p01001532149yyy
> 2: 128.142.zzz:6790/0 mon.p01001532184zzz
> 
> 
> # ceph tell mon.* version
> mon.p01001532077xxx: ceph version 0.94.5
> (9764da52395923e0b32908d83a9f7304401fee43)
> mon.p01001532149yyy: ceph version 0.94.5
> (9764da52395923e0b32908d83a9f7304401fee43)
> mon.p01001532184zzz: ceph version 0.94.5
> (9764da52395923e0b32908d83a9f7304401fee43)
> 
> So, mon.* resolves to the IDs. You can tell directly to the IDs:
> 
> # ceph tell mon.p01001532077xxx version
> ceph version 0.94.5 (9764da52395923e0b32908d83a9f7304401fee43)
> # ceph tell mon.p01001532149yyy version
> ceph version 0.94.5 (9764da52395923e0b32908d83a9f7304401fee43)
> # ceph tell mon.p01001532184zzz version
> ceph version 0.94.5 (9764da52395923e0b32908d83a9f7304401fee43)
> 
> And you can also tell directly to the ranks:
> 
> # ceph tell mon.0 version
> ceph version 0.94.5 (9764da52395923e0b32908d83a9f7304401fee43)
> # ceph tell mon.1 version
> ceph version 0.94.5 (9764da52395923e0b32908d83a9f7304401fee43)
> # ceph tell mon.2 version
> ceph version 0.94.5 (9764da52395923e0b32908d83a9f7304401fee43)

Ok, thanks Dan for your answer. If understand well:

1. with `ceph tell mon.* version`, "*" are expanded to the IDs of monitors.

2. But with `ceph tell mon.$thing version`, if $thing is a interger, $thing
is interpreted as a rank not as an ID, and if not $thing is interpreted as
an ID.

Is it correct?

If yes, by conclusion : for the monitor ID, it's better to chose an ID which
is not an integer (even if it's not very dramatic).

-- 
François Lafont
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