On Wed, 27 Apr 2011, Tommi Virtanen wrote:
> Hi. Our autotest runs log just way too much debug stuff. A 20-minute
> run often creates >10GB uncompressed data. That's enough that
> compressing & transporting it for archival slows down the test
> significantly.
>
> Ceph devs, I need your help in determining what debug logs can be
> turned down a notch or two without losing anything really valuable.
>
> The base config is at ceph-autotests.git teuthology/ceph.conf,
> relevant lines pasted below:
>
> [mon]
> lockdep = 1
> debug mon = 20
> debug paxos = 20
> debug auth = 20
> debug ms = 1
>
> [osd]
> lockdep = 1
> debug ms = 1
> debug osd = 25
> debug monc = 20
> debug journal = 20
> debug filestore = 20
>
> [mds]
> lockdep = 1
> debug ms = 1
> debug mds = 20
> debug auth = 20
> debug monc = 20
> mds debug scatterstat = true
> mds verify scatter = true
> mds log max segments = 2
> mds cache size = 10000
> mds debug frag = true
>
> What can I turn down? If I don't get helpful suggestions, everything
> 20 goes down to 10 ;)
That's my initial suggestion.
I wonder, though, if we should really turn it all the way off. That will
make our tests run much faster and mimic real life more closely. If
something fails, we can re-run that one test with logging and go from
there. As long as that part is easy enough to do...
sage
>
>
> The worst that happens if we have the defaults not include some debug
> you wanted see is you make your test override it and re-run; for
> example,
>
> class ceph_dbench(skeleton.CephTest):
> ...
> @skeleton.role('client')
> def init_025_moar_debug(self):
> self.ceph_conf['osd']['debug osd'] = 9000
>
> should do it just fine.
>
> (We can make that even easier, if it becomes commonplace enough. My
> motto is to first feel the pain. YAGNI and all that.)
>
> --
> :(){ :|:&};:
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>
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