On Tue, Jul 16, 2013 at 8:05 AM, Greg Chavez <greg.chavez@xxxxxxxxx> wrote:
This is interesting. So there are no built-in ceph commands that can
calculate your usable space? It just so happened that I was going to
try and figure that out today (new Openstack block cluster, 20TB total
capacity) by skimming through the documentation. I figured that there
had to be a command that would do this. Blast and gadzooks.
--
On Tue, Jul 16, 2013 at 10:37 AM, Ta Ba Tuan <tuantb@xxxxxxxxxx> wrote:
>
> Thank Sage,
>
> tuantaba
>
>
> On 07/16/2013 09:24 PM, Sage Weil wrote:
>>
>> On Tue, 16 Jul 2013, Ta Ba Tuan wrote:
>>>
>>> Thanks Sage,
>>> I wories about returned capacity when mounting CephFS.
>>> but when disk is full, capacity will showed 50% or 100% Used?
>>
>> 100%.
>>
>> sage
>>
>>>
>>> On 07/16/2013 11:01 AM, Sage Weil wrote:
>>>>
>>>> On Tue, 16 Jul 2013, Ta Ba Tuan wrote:
>>>>>
>>>>> Hi everyone.
>>>>>
>>>>> I have 83 osds, and every osds have same 2TB, (Capacity sumary is
>>>>> 166TB)
>>>>> I'm using replicate 3 for pools ('data','metadata').
>>>>>
>>>>> But when mounting Ceph filesystem from somewhere (using: mount -t ceph
>>>>> Monitor_IP:/ /ceph -o name=admin,secret=xxxxxxxxxx")
>>>>> then capacity sumary is showed "160TB"?, I used replicate 3 and I think
>>>>> that
>>>>> it must return 160TB/3=50TB?
>>>>>
>>>>> Filesystem Size Used Avail Use% Mounted on
>>>>> 192.168.32.90:/ 160T 500G 156T 1% /tmp/ceph_mount
>>>>>
>>>>> Please, explain this help me?
>>>>
>>>> statfs/df show the raw capacity of the cluster, not the usable capacity.
>>>> How much data you can store is a (potentially) complex function of your
>>>> CRUSH rules and replication layout. If you store 1TB, you'll notice the
>>>> available space will go down by about 2TB (if you're using the default
>>>> 2x).
>>>>
>>>> sage
>>>
>>>
>
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\*..+.-
--Greg Chavez
+//..;};
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