#ceph IRC Log

Index

IRC Log for 2012-03-20

Timestamps are in GMT/BST.

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[0:49] <yehudasa_> gregaf: relevant hotspots: DoutStreambuf<>::overflow, ~DoutLocker
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[0:52] <gregaf> yehudasa_: I should have read his comments better, he responded to mye mail pretty quick
[0:52] <gregaf> he wrote it because pthread_spinlock_t doesn't have a static initializer, so you can't use it in global constructors
[0:53] <yehudasa_> hmm, I see
[0:53] <gregaf> I'm not sure how important that is to our use of dout, though
[0:53] <gregaf> actually, I'm not really sure why we can't use it in global constructors, but I decided I didn't want to remember that sort of crap a long time ago :p
[0:55] <joshd> gregaf: order of global initialization is undefined iirc
[0:55] <gregaf> yeah...
[0:55] <gregaf> oh, so you don't know if it's been inited yet, dur
[0:56] <yehudasa_> yeah, in any case, we may try to think of a different solution than reimplementing spinlocks
[0:56] <gregaf> yeah, I haven't looked into it too much
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[13:25] <Liam_SA> hi can someone help me out im having problems getting ceph running with one of each on one vm
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[13:39] <Liam_SA> hi there can someone give me a hand my osd it not starting
[13:48] <wonko_be> check your log, see what it says
[13:49] <Liam_SA> well my mon log gives mds.a: couldn't find entity name: mds.a but my on is namaed mon.0?
[13:50] <Liam_SA> after mkcephfs i dont have any errors
[13:51] <wonko_be> you're mixing mon and mds naming?
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[14:50] <Liam_SA> wonko_be: sorry was called away for a meeting
[14:53] <Liam_SA> does mds hava to be labeled mds.a/b/c because in my config file its mds.0
[14:54] <tnt_> Yes I think so.
[14:57] <Dieter_be> why is libedit a dependency?
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[15:29] <Dieter_be> are there known ceph production deployments?
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[15:39] <iggy> Dieter_be: there are some people using the rbd backend with kvm/xen/etc.
[15:40] <iggy> I doubt many people are using the actual filesystem
[15:41] <Dieter_be> well, actually i'm most interested in the object store at this point
[15:41] <Dieter_be> i'm comparing swift to ceph. we need a HA object store, size +- 100TB of files, avg 150MB upto 5GB (later, files will get bigger). file access preferably over linux vfs mount (although api is acceptable too). it seems to me ceph is a bit more promising, but less tested, whereas swift seems to have more production deployments
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[15:43] <Dieter_be> i've checked some podcasts, a whole bunch of videos, read a lot of articles etc. and swift and ceph seem to be close.
[15:44] <Dieter_be> my gut feeling says ceph is a bit better engineered, but also more complicated overall
[15:45] <Dieter_be> seeing other companies successfully using it would be a good push for me :)
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[15:46] <Dieter_be> on a related note, why is there no ceph-users mailing list? only devel and commits?
[16:00] <wonko_be> there are no users yet :)
[16:10] * eternaleye_ is now known as eternaleye
[16:11] <vhasi> at least there shouldn't be
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[16:18] <Dieter_be> you guys are joking right...
[16:19] <Dieter_be> btw hi wonko_be !
[16:22] <NaioN> Well they haven't released it for production yet
[16:22] <NaioN> so you only have testers :)
[16:27] <Dieter_be> well at least dreamhost seems to be using it on a large scale already
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[16:54] <wonko_be> Dieter_be: hi!
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[19:55] <iggy> Dieter_be: sorry, was away from my desk for a while... as I said most people actually using ceph thus far are accessing the osd's directly (usually via librbd or the kernel rbd driver)
[19:56] <iggy> so yeah... there aren't technically ceph filesystem "users" yet
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[19:58] <Dieter_be> iggy: that doesn't matter. it's still interesting to know who is using the blob storage
[19:59] <iggy> I'm not sure I should out anybody, but you can get a few names from the mailing list if you look at people's email addresses
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[20:08] <NaioN> Dieter_be: at the moment I'm using the rbd's for backup
[20:08] <NaioN> I've tried the cephfs but in my case it wasn't stable enough...
[20:09] <NaioN> with the rbd's I've no problems
[20:12] <wonko_be> we've used rbd for a while for timemachine backups of all office laptops
[20:13] <wonko_be> ran stable, as long as netatalk behaved
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