On 8/31/2012 12:10 PM, Sage Weil wrote:
On Fri, 31 Aug 2012, Andrew Thompson wrote:
Have you been reweight-ing osds? I went round and round with my
cluster a few days ago reloading different crush maps only to find
that it re-injecting a crush map didn't seem to overwrite reweights.
Take a look at `ceph osd tree` to see if the reweight column matches
the weight column.
Note that the ideal situation is for reweight to be 1, regardless of what
the crush weight is. If you find the utilizations are skewed, I would
look for other causes before resorting to reweight-by-utilization; it is
meant to adjust the normal statistical variation you expect from a
(pseudo)random placement, but if the variance is high there is likely
another cause.
So if someone(me, guilty) had been messing with reweight, will setting
them all to 1 return it to a normal un-reweight-ed state?
--
Andrew Thompson
http://aktzero.com/
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