On 11 Mar 2014, at 6:23 pm, Vladislav Bogdanov <bub...@hoster-ok.com> wrote:
> 07.03.2014 10:30, Vladislav Bogdanov wrote: >> 07.03.2014 05:43, Andrew Beekhof wrote: >>> >>> On 6 Mar 2014, at 10:39 pm, Vladislav Bogdanov <bub...@hoster-ok.com> wrote: >>> >>>> 18.02.2014 03:49, Andrew Beekhof wrote: >>>>> >>>>> On 31 Jan 2014, at 6:20 pm, yusuke iida <yusk.i...@gmail.com> wrote: >>>>> >>>>>> Hi, all >>>>>> >>>>>> I measure the performance of Pacemaker in the following combinations. >>>>>> Pacemaker-1.1.11.rc1 >>>>>> libqb-0.16.0 >>>>>> corosync-2.3.2 >>>>>> >>>>>> All nodes are KVM virtual machines. >>>>>> >>>>>> stopped the node of vm01 compulsorily from the inside, after starting 14 >>>>>> nodes. >>>>>> "virsh destroy vm01" was used for the stop. >>>>>> Then, in addition to the compulsorily stopped node, other nodes are >>>>>> separated from a cluster. >>>>>> >>>>>> The log of "Retransmit List:" is then outputted in large quantities from >>>>>> corosync. >>>>> >>>>> Probably best to poke the corosync guys about this. >>>>> >>>>> However, <= .11 is known to cause significant CPU usage with that many >>>>> nodes. >>>>> I can easily imagine this staving corosync of resources and causing >>>>> breakage. >>>>> >>>>> I would _highly_ recommend retesting with the current git master of >>>>> pacemaker. >>>>> I merged the new cib code last week which is faster by _two_ orders of >>>>> magnitude and uses significantly less CPU. >>>> >>>> Andrew, current git master (ee094a2) almost works, the only issue is >>>> that crm_diff calculates incorrect diff digest. If I replace digest in >>>> diff by hands with what cib calculates as "expected". it applies >>>> correctly. Otherwise - -206. >>> >>> More details? >> >> Hmmm... >> seems to be crmsh-specific, >> Cannot reproduce with pure-XML editing. >> Kristoffer, does >> http://hg.savannah.gnu.org/hgweb/crmsh/rev/c42d9361a310 address this? > > The problem seems to be caused by the fact that crmsh does not provide > <status> section in both orig and new XMLs to crm_diff, and digest > generation seems to rely on that, so crm_diff and cib daemon produce > different digests. > > Attached are two sets of XML files, one (orig.xml, new.xml, patch.xml) > are related to the full CIB operation (with status section included), > another (orig-edited.xml, new-edited.xml, patch-edited.xml) have that > section removed like crmsh does do. > > Resulting diffs differ only by digest, and that seems to be the exact issue. This should help. As long as crmsh isn't passing -c to crm_diff, then the digest will no longer be present. https://github.com/beekhof/pacemaker/commit/c8d443d
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