Hi, Am 11.01.2018 um 13:46 schrieb Sage Weil: > On Thu, 11 Jan 2018, Stefan Priebe - Profihost AG wrote: >> Thanks! Can this be done while still having jewel clients? > > Yeah. If I'm understanding your crush dump properly, the *-target-weight > part of the tree isn't doing anything except acting as a place for your > custom tool to store the target weights. Removing this wont' change > anything at all. And the compat weight-set is called 'compat' because it > is backwards compatible with old clients. :) Thank! It's the tool from Loic - i haven't seen him here for a long time. See: http://crush.readthedocs.io/en/latest/ Greets, Stefan > sage > >> >> Stefan >> >> Excuse my typo sent from my mobile phone. >> >>> Am 10.01.2018 um 22:56 schrieb Sage Weil <sage@xxxxxxxxxxxx>: >>> >>>> On Wed, 10 Jan 2018, Stefan Priebe - Profihost AG wrote: >>>>> Am 10.01.2018 um 22:23 schrieb Sage Weil: >>>>>> On Wed, 10 Jan 2018, Stefan Priebe - Profihost AG wrote: >>>>>> k, >>>>>> >>>>>> in the past we used the python crush optimize tool to reweight the osd >>>>>> usage - it inserted a 2nd tree with $hostname-target-weight as hostnames. >>>>> >>>>> Can you attach a 'ceph osd crush tree' (or partial output) so I can see >>>>> what you mean? >>>> >>>> Sure - attached. >>> >>> Got it >>> >>>>>> Now the quesions are: >>>>>> 1.) can we remove the tree? How? >>>>>> 2.) Can we do this now or only after all clients are running Luminous? >>>>>> 3.) is it enought to enable the mgr balancer module? >>> >>> First, >>> >>> ceph osd crush weight-set create-compat >>> >>> then for each osd, >>> ceph osd crush weight-set reweight-compat <osd> <optimized-weight> >>> ceph osd crush reweight <osd> <target-weight> >>> >>> That won't move any data but will keep your current optimized weights in >>> the compat weight-set where they belong. >>> >>> Then you can remove the *-target-weight buckets. For each osd, >>> >>> ceph osd crush rm <osd> <ancestor>-target-weight >>> >>> and then for each remaining bucket >>> >>> ceph osd crush rm <foo>-target-weight >>> >>> Finally, turn on the balancer (or test it to see what it it wants to do >>> with the optimize command.) >>> >>> HTH! >>> sage >> -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
