Re: How to increase the number of pgs at pool creation time?

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On Thu, Aug 23, 2012 at 2:48 PM, Jim Schutt <jaschut@xxxxxxxxxx> wrote:
> On 08/23/2012 03:26 PM, Tren Blackburn wrote:
>>
>> On Thu, Aug 23, 2012 at 2:17 PM, Jim Schutt<jaschut@xxxxxxxxxx>  wrote:
>>>
>>> On 08/23/2012 02:39 PM, Tren Blackburn wrote:
>>>>
>>>>
>>>> 2) Increase the number of pgs via ceph.conf (osd pg bits = 7) and
>>>> create the cluster. This does not work either as the cluster comes up
>>>> with 6 pgs bits per osd still.
>>>>       re:http://ceph.com/docs/master/config-cluster/osd-config-ref/
>>>
>>>
>>>
>>> I use this regularly.  Do you have that in your global section, i.e.
>>>
>>> [global]
>>>          osd pg bits = 7
>>>          osd pgp bits = 7
>>>
>> Hi Jim;
>>
>> Sorry about the direct reply. I have cc'ed the list. To answer your
>> question I put that setting in the [osd] section, not the [global]
>> section. How would a person know these settings go in [global]?
>
>
> I'm sorry to admit I haven't learned how to know this
> either.  I recall trying it in the [osd] section and
> not having it work, and thinking maybe the monitor
> would need to know, and putting it in the [global]
> section would give it access.  It worked, so I moved on.
>
>
>> Also,
>> I could not find documentation about "pgp bits" What is a "placement
>> group p bit"?
>
>
> Again, I'm not sure.  The default config has pg bits and
> pgp bits set to the same value, so I think I assumed it
> would be best to have them the same if I changed pg bits.
>
>>
>> Thank you in advance!
>
>
> Sorry I don't know more....

Well, you solved my immediate problem for me, so thank you very much
Jim! However if a dev might have a chance to explain these few
questions, that would be very appreciated!

t.
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