On Thu, 2009-01-22 at 15:44 +0000, Wojciech Turek wrote: > Hello, Hi,
> Lustre MDS report following error: > Jan 22 15:20:40 mds01.beowulf.cluster kernel: LustreError: > 24680:0:(lov_request.c:692:lov_update_create_set()) error creating fid > 0xeb79c9d sub-object on OST idx 4/1: rc = -28 -28 is ENOSPC. > Which I translate as that one of the OST (index 4/1) is full and has > no space left on device. Yes. > OSS seem to be consistent and says: > Jan 22 15:21:15 storage08.beowulf.cluster kernel: LustreError: > 23507:0:(filter_io_26.c:721:filter_commitrw_write()) error starting > transaction: rc = -30 Hrm. I'm not sure a -30 (EROFS) would translate to a -28 to the MDS. I think it would also be a -30. So are you sure you are looking at correlating messages? The timestamps, if the two nodes are in sync also seem to indicate a lack of correlation with 35s of disparity. Perhaps there is an actual -28 in the OSS log prior to the -30 one? > Which I translate as Client would like to write to an existing file > but it can't because file system is read only. Indeed. But why is it read-only? There should be an event in the OSS log saying that it was turning the filesystem read-only. > The OST device is still mounted with rw option Yeah. That's just the state at mount time. Lustre will set a device read-only in the case of filesystem errors, as one example. > Now the main question is why Lustre thinks that OST(idx4) is full? No, I think the main question is why is it read-only. The full situation may have been transient where it filled up momentarily and then some objects were removed. In any case, this is a secondary issue and really only need be considered once the read-only situation is understood. > Is it possible that this OST have meny orphaned objects which takes > all the available space? That would be reflected in the df. If you suspect there may be orphan objects though, you could lfsck to verify and clean. > Is there a way of reclaiming back this free space? If you mean orphaned OST objects, then lfsck. b.
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