#ceph IRC Log

Index

IRC Log for 2012-11-11

Timestamps are in GMT/BST.

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[15:26] <didders_> Hi
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[15:30] <joao> hello
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[16:15] <joao> hey jtang1, how's sc12 going?
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[16:28] <jtang> joao: so far im at a workshop
[16:28] <jtang> https://sites.google.com/a/lbl.gov/ndm2012/home/program
[16:28] <jtang> looks kinda neat
[16:28] <jtang> just seeing what others are doing in relation to this topic
[16:29] <jtang> it's bit of a weird dry state
[16:29] <jtang> went into a pub last night and didn't get carded ;)
[16:29] <jtang> there's going to be lots of gridftp here today in this workshop
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[16:30] <gucki> good morning
[16:33] <jtang> i need to make my old supervisor guilty and get him to buy me dinner
[16:33] <jtang> :)
[16:33] <jtang> assuming he isnt hiding away at some ibm user group meeting or anything like that
[16:36] <jtang> actually the scope of the workshop im at looks cool
[16:39] <jtang> im looking at that is
[16:46] <joao> jtang, lucky you for not being carded
[16:46] <joao> I was carded when entering inktank's launch party, while wearing inktank's shirt
[16:46] <joao> and off I went to the hotel to grab my ID :p
[16:47] <jtang> heh
[16:47] <jtang> i never get carded in europe, just in the US
[16:47] <jtang> *sigh*
[16:48] <joao> yeah, I know the feeling
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[17:12] <jtang> shame there is no ceph peeps here at this workshop ;)
[17:13] <jtang> it seems to be coming at it from a datacentre perspective
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[19:48] <gucki> when i added a new osd, i misspelled the rack name. now when i try to do a "ceph osd crush move .." it tells me "unknown command crush"?? "ceph osd crush set ..." worked fine..?
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[19:51] <NaioN> gucki: you could also download the crushmap, convert it, edit it, convert it, upload it...
[19:52] <NaioN> you can edit it as a plain text file
[19:52] <gucki> NaioN:yes i already opened it. i'm not sure if i can safely delete the misspelled rack and simply move the items to the correct rack?
[19:53] <gucki> NaioN: seems i also have to adjust the calculated (summed) weights, right?
[19:53] <gucki> NaioN: the weights of the parents
[19:53] <gucki> NaioN: or does ceph fix the parents weights automatically?
[19:55] <NaioN> nope you have to sum them correctly as fas as i know
[19:55] <NaioN> but yeah you can delete the misspelled rack and move the osd to the correct rack
[19:56] <gucki> NaioN: old: http://pastie.org/5361756 new: http://pastie.org/5361757
[19:56] <gucki> NaioN: moved the 16439 from "unknownrack," to "unknownrack" and removed "unknownrack,"
[19:58] <gucki> NaioN: do you think it looks good? :)
[19:58] <NaioN> yeah looks ok
[19:58] <NaioN> the weights are a bit strange but I assume you have a good reason for that
[19:58] <gucki> NaioN: ok, tnx. should i file a bug report for the "ceph osd crush move.."?
[19:59] <NaioN> well dunno, can you find documentation about the call?
[19:59] <gucki> NaioN: yeah I have to rebalance all weights later on. i didn't take different disk sizes into account at first. so now i say 1TB is weight 1. so the new node already has weights based on that. i'll update the other weights later on. it's ok this way, right? :)
[20:00] <gucki> NaioN: yes, here: http://ceph.com/docs/master/cluster-ops/control/
[20:00] <NaioN> yes i see
[20:00] <NaioN> well you could file a bug report
[20:00] <jluis> gucki, what was the full command?
[20:00] <NaioN> don't if it stumbles over the ,
[20:00] <NaioN> could be
[20:01] <gucki> jluis: ceph osd crush move $ID pool=default rack=unknownrack host=$HOST
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[20:01] <gucki> jluis: ID=8, HOST=16439
[20:01] <gucki> jluis: I also tried with ID=osd.8 ...I think it's quire confusing that sometimes one has to use the name (osd.8) and sometimes the id (8)?
[20:02] <jluis> just looking at the code and trying to figure out what might have happened
[20:02] <jluis> just a sec
[20:02] <gucki> jluis: ah, but probably move is newer...i'm on latest argonaut, not master
[20:02] <NaioN> gucki: the id of the osd was 7
[20:02] <NaioN> 8 was the rack...
[20:03] <NaioN> gucki: see the id's in the crushmap
[20:03] <gucki> NaioN: strange, I did the creation with "ceph osd crush set $ID osd.$ID 0.08 pool=default rack=unknownrack host=$HOST"
[20:03] <gucki> NaioN: well, with the "," after unknownrack :(
[20:04] <NaioN> well the move command looks more generic
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[20:05] <NaioN> meaning you could move all sorts of buckets, so not only the leaves (osds)
[20:05] <gucki> NaioN: ceph osd tree shows me id -8 for the rack and +
[20:05] <gucki> NaioN: ... and +8 for the osd.8
[20:05] <NaioN> aha k
[20:07] <jluis> fwiw, I *think* it should have worked
[20:07] <jluis> unless I'm missing something terribly obvious
[20:07] <jluis> I mean, at least it shouldn't have outputted the 'unknown command' bit
[20:08] <gucki> jluis: no, it didn't do anything
[20:08] <gucki> jluis: i now edited the crushmap manually and injected it, now it rebalances again :)
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[20:09] <gucki> btw, the output of "ceph osd tree" isn't nice when the weight have to many digits (0.08 gets output as 0.0799866). i'll file a bug report for it
[20:12] <NaioN> hmmm i doubt if it's smart to use osds with such differences in a cluster
[20:15] <gucki> is the bugtracker of ceph down again?
[20:17] <NaioN> looks like it
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[22:45] <jtang> how hard do you think adding shibbolleth would be to the swift/s3 api in ceph?
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[22:46] <jtang> or doing some form of integration of shibboleth
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