Stefan Priebe wrote:
Hi,
Am 22.01.2013 22:26, schrieb Jeff Mitchell:
Mark Nelson wrote:
It may (or may not) help to use a power-of-2 number of PGs. It's
generally a good idea to do this anyway, so if you haven't set up your
production cluster yet, you may want to play around with this.
Basically
just take whatever number you were planning on using and round it up
(or
down slightly). IE if you were going to use 7,000 PGs, round up to
8192.
As I was asking about earlier on IRC, I'm in a situation where the docs
did not mention this in the section about calculating PGs so I have a
non-power-of-2 -- and since there are some production things running on
that pool I can't currently change it.
Oh same thing here - did i miss the doc or can someone point me the
location.
Here you go: http://ceph.com/docs/master/rados/operations/placement-groups/
(Notice the lack of any power-of-2 mention :-) )
--Jeff
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