Re: speedup ceph / scaling / find the bottleneck

[Stefan Priebe <s.priebe@profihost.ag>]

I'm sorry but this is the KVM Host Machine there is no ceph running on 
this machine.

If i change the admin socket to:
admin_socket=/var/run/ceph_$name.sock

i don't have any socket at all ;-(

Am 03.07.2012 17:31, schrieb Sage Weil:
> On Tue, 3 Jul 2012, Stefan Priebe - Profihost AG wrote:
>> Hello,
>>
>> Am 02.07.2012 22:30, schrieb Josh Durgin:
>>> If you add admin_socket=/path/to/admin_socket for your client running
>>> qemu (in that client's ceph.conf section or manually in the qemu
>>> command line) you can check that caching is enabled:
>>>
>>> ceph --admin-daemon /path/to/admin_socket show config | grep rbd_cache
>>>
>>> And see statistics it generates (look for cache) with:
>>>
>>> ceph --admin-daemon /path/to/admin_socket perfcounters_dump
>>
>> This doesn't work for me:
>> ceph --admin-daemon /var/run/ceph.sock show config
>> read only got 0 bytes of 4 expected for response length; invalid
>> command?2012-07-03 09:46:57.931821 7fa75d129700 -1 asok(0x8115a0) AdminSocket:
>> request 'show config' not defined
>
> Oh, it's 'config show'.  Also, 'help' will list the supported commands.
>
>> Also perfcounters does not show anything:
>> # ceph --admin-daemon /var/run/ceph.sock perfcounters_dump
>> {}
>
> There may be another daemon that tried to attach to the same socket file.
> You might want to set 'admin socket = /var/run/ceph/$name.sock' or
> something similar, or whatever else is necessary to make it a unique file.
>
>> ~]# ceph -v
>> ceph version 0.48argonaut-2-gb576faa
>> (commit:b576faa6f24356f4d3ec7205e298d58659e29c68)
>
> Out of curiousity, what patches are you applying on top of the release?
>
> sage
>