Thank you for the info. Basically I should just set it to 1.
On Fri, May 13, 2016 at 5:12 PM Gregory Farnum <gfar...@redhat.com> wrote: > On Fri, May 13, 2016 at 5:02 PM, Tu Holmes <tu.hol...@gmail.com> wrote: > > Hello again Cephers... As I'm learning more and breaking more things, I'm > > finding more things I don't know. > > > > So currently, with all of the other things since I started upgrading to > > Jewel, I'm seeing this in my logs. > > > > crush map has straw_calc_version=0 > > > > Now, yes, I understand the general crush map and what it does, but what > is > > this straw_calc_version. > > > > Should I change this tunable to a different version? > > > > Is there a potential for it to break something if I do? > > > > I didn't see this before the Jewel upgrade, so I'm inclined to change it, > > but I want to make sure I'm not breaking something. > > > See > http://docs.ceph.com/docs/master/rados/operations/crush-map#straw-calc-version-tunable > and http://docs.ceph.com/docs/master/release-notes/#adjusting-crush-maps > > This was initially an option in Firefly, but with Jewel we're pushing > you a little harder to switch. It shouldn't break anything directly > (unlike most other crush tunables, it doesn't change which clients can > connect) but does have potential for data movement. > -Greg >
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