#ceph IRC Log

Index

IRC Log for 2012-10-14

Timestamps are in GMT/BST.

[0:00] <darkfaded> and lvm is so 90s, lets stick with partitions! :)
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[0:03] <dmick> slate: no config per se; it's just "the filesystem" (and the journal, which is generally separate)
[0:03] <dmick> you specify the path for OSD primary storage, and a path to a journal (which is often a raw partition)
[0:03] <dmick> if that filesystem spans devices somehow, that's fine, although it has consequences on reliability of course.
[0:04] <slate> which would defeat some purpose imo
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[0:33] <phantomcircuit> does ceph keep track of block checksums in the metadata?
[0:33] <phantomcircuit> or is it assumed that the osd's filesystem will get it right
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[0:36] <darkfaded> i heard people talk about crc32c here, so i think it has some checksumming now, but you'll better search a bit to verify
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[2:43] <phantomcircuit> hmm
[2:44] <phantomcircuit> i have a setup with a single mds on the same host as two ods'
[2:45] <phantomcircuit> the mds i think is being blacklisted by the ods' which means everything just stops working temporarily
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[18:36] <tziOm> Any help on tuning ceph performance?
[18:37] <tziOm> I have 4 osds each with 2x gigabit 802.3ad where md set writes at approx 220MB/sec, netperf shows me full gigabit on every interface, but still ceph only gives me at max 40MB/sec writes..
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[20:01] <tziOm> How is the choice of osd addresses taken (public_addr, cluster_addr, heartbeat_addr)
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[20:53] <rlr219> Hi. I had an OSD crash. now it won't start. one of the errors I see is :filestore(/home/cephbrick/ceph/osd) error (17) File exists not handled on operation 22 (45588005.0.7, or op 7, counting from 0) Any ideas??
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[21:16] <jks> Trying to install Ceph with the new RPMs... when I run "service ceph start" nothing is output and nothing is started... anyone seen that before?
[21:16] <jks> (ceph.conf, keyring, etc. is all in place)
[21:19] <jks> ah, nothing happens if you do not specify a specific daemon - good to know ;-)
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