lars.ellenberg at linbit
Sep 28, 2009, 2:34 AM
Post #2 of 2
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On Sun, Sep 27, 2009 at 03:06:09AM -0400, sylarrrrrrr [at] aim wrote:
>
> Hi
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>
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> In /proc/drbd, I get oos:500 about every week. I get it after I run
> verify. After that I restart the secondary, and get oos:0, and then
> verify pass fine with oss:0. But after a week I get oos:500 again.
> When I write 500, I mean about 500, every week the number is a bit
> different. I have ocfs2 on top of drbd that is on top of lvm that is
> on top of mdadm raid5. My meta data is on top of an lvm that is on top
> of a separate single disk. My meta data is a 47MB partition of which
> 44MB? is used by LVM. I didn't touch any of the default sizes for
> anything of the underlying systems. I know that mdadm chunk size is
> 64kb. Lvm PE is 4MB. drbd version is 8.3.2rc2
>
>
>
> Is this a serious problem?
It _may_ be indicative of a problem.
some threads around that topic:
What causes nodes to become out-of-sync?
http://thread.gmane.org/gmane.linux.network.drbd/15430/
Behaviour of verify: false positives -> true positives
(gmane of this seems currently broken,
but there are more archives.)
http://marc.info/?l=drbd-dev&m=122112577026196&w=2
http://marc.info/?l=drbd-dev&m=122112583726317&w=2
tons of out-of-sync sectors detected
http://thread.gmane.org/gmane.linux.network.drbd/15537
and that one:
http://thread.gmane.org/gmane.linux.network.drbd/15167/focus=15171
> I want to run drbd in dual primary mode, but due to this problem I am
> being cautious and run it primary only on node #1.
>
> What can I do to solve this problem?
--
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com
DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
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