Re: Urgent Notice to Users on 0.61.1

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On Fri, 10 May 2013, Mike Dawson wrote:
> Anyone running 0.61.1,
> 
> Watch out for high disk usage due to a file likely located at
> /var/log/ceph/ceph-mon.<mon-name>.tdump. This file contains debugging for
> monitor transactions. This debugging was added in the past week or so to track
> down another anomaly. It is not necessary (or useful unless you are debugging
> monitor transactions).
> 
> Depending on the load of your cluster, the tdump file may become large
> quickly. I've seen it grow over 50GB/day.
> 
> IMHO, the default setting should be "false", but it was merged in prior to
> 0.61.1 with a default of "true". If you are on 0.61.1, you can confirm the
> settings with:
> 
> ceph --admin-daemon /var/run/ceph/ceph-mon.<mon-name>.asok config show | grep
> mon_debug_dump
> 
> To disable it, add "mon debug dump transactions = false" to ceph.conf, and
> restart your monitors. Alternatively, you can inject the argument or add the
> cmdline flag.

You can avoid the restart with

 ceph mon tell \* injectargs '--mon-debug-dump-transactions=false'

Thanks, Mike, for pointing this out!  We'll put together another point 
release shortly.  In the meantime, anyone running .1 should run the above 
to avoid filling your disk.

sage

> 
> dmick has an issue started at:
> http://tracker.ceph.com/issues/5024
> 
> Thanks,
> Mike
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