Hi Jost,
i tried scsi-hd with discard_granularity=512 the UNMAP / Trim itself
works fine the space is freed at ceph but at the VM i'm getting:
[ 75.076895] sd 2:0:0:4: [sdc]
[ 75.078353] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 75.079377] sd 2:0:0:4: [sdc]
[ 75.080410] Sense Key : Aborted Command [current]
[ 75.081446] sd 2:0:0:4: [sdc]
[ 75.082459] Add. Sense: I/O process terminated
[ 75.083466] sd 2:0:0:4: [sdc] CDB:
[ 75.084473] Write same(16): 93 08 00 00 00 00 00 00 00 00 00 7f ff ff
00 00
[ 75.085535] end_request: I/O error, dev sdc, sector 0
[ 75.086567] sd 2:0:0:4: [sdc]
[ 75.087569] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 75.088605] sd 2:0:0:4: [sdc]
[ 75.089610] Sense Key : Aborted Command [current]
[ 75.090630] sd 2:0:0:4: [sdc]
[ 75.091631] Add. Sense: I/O process terminated
[ 75.092621] sd 2:0:0:4: [sdc] CDB:
[ 75.093579] Write same(16): 93 08 00 00 00 00 00 7f ff ff 00 7f ff ff
00 00
[ 75.094581] end_request: I/O error, dev sdc, sector 8388607
[ 75.095558] sd 2:0:0:4: [sdc]
[ 75.096561] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 75.097553] sd 2:0:0:4: [sdc]
[ 75.098520] Sense Key : Aborted Command [current]
[ 75.099484] sd 2:0:0:4: [sdc]
[ 75.100471] Add. Sense: I/O process terminated
[ 75.101439] sd 2:0:0:4: [sdc] CDB:
[ 75.102432] Write same(16): 93 08 00 00 00 00 00 ff ff fe 00 7f ff ff
00 00
[ 75.103464] end_request: I/O error, dev sdc, sector 16777214
[ 75.104503] sd 2:0:0:4: [sdc]
[ 75.105507] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 75.106514] sd 2:0:0:4: [sdc]
[ 75.107525] Sense Key : Aborted Command [current]
[ 75.108545] sd 2:0:0:4: [sdc]
[ 75.109525] Add. Sense: I/O process terminated
[ 75.110487] sd 2:0:0:4: [sdc] CDB:
[ 75.111418] Write same(16): 93 08 00 00 00 00 01 7f ff fd 00 7f ff ff
00 00
[ 75.112419] end_request: I/O error, dev sdc, sector 25165821
[ 75.238627] sd 2:0:0:4: [sdc]
[ 75.239946] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 75.241197] sd 2:0:0:4: [sdc]
[ 75.242097] Sense Key : Aborted Command [current]
[ 75.242627] sd 2:0:0:4: [sdc]
[ 75.242627] Add. Sense: I/O process terminated
[ 75.242627] sd 2:0:0:4: [sdc] CDB:
[ 75.242627] Write same(16): 93 08 00 00 00 00 01 ff ff fc 00 7f ff ff
00 00
[ 75.242627] end_request: I/O error, dev sdc, sector 33554428
[ 75.447311] sd 2:0:0:4: [sdc]
[ 75.448505] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 75.449392] sd 2:0:0:4: [sdc]
[ 75.450262] Sense Key : Aborted Command [current]
[ 75.451134] sd 2:0:0:4: [sdc]
[ 75.451312] Add. Sense: I/O process terminated
[ 75.451312] sd 2:0:0:4: [sdc] CDB:
[ 75.451312] Write same(16): 93 08 00 00 00 00 02 7f ff fb 00 7f ff ff
00 00
[ 75.451312] end_request: I/O error, dev sdc, sector 41943035
[ 75.476364] sd 2:0:0:4: [sdc]
[ 75.477252] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 75.478135] sd 2:0:0:4: [sdc]
[ 75.479004] Sense Key : Aborted Command [current]
[ 75.479891] sd 2:0:0:4: [sdc]
[ 75.480358] Add. Sense: I/O process terminated
[ 75.480358] sd 2:0:0:4: [sdc] CDB:
[ 75.480358] Write same(16): 93 08 00 00 00 00 02 ff ff fa 00 7f ff ff
00 00
[ 75.480358] end_request: I/O error, dev sdc, sector 50331642
[ 75.496374] sd 2:0:0:4: [sdc]
[ 75.497202] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 75.498077] sd 2:0:0:4: [sdc]
[ 75.498948] Sense Key : Aborted Command [current]
[ 75.499818] sd 2:0:0:4: [sdc]
[ 75.500374] Add. Sense: I/O process terminated
[ 75.500374] sd 2:0:0:4: [sdc] CDB:
[ 75.500374] Write same(16): 93 08 00 00 00 00 03 7f ff f9 00 7f ff ff
00 00
[ 75.500374] end_request: I/O error, dev sdc, sector 58720249
Stefan
Am 02.11.2012 09:20, schrieb Stefan Priebe - Profihost AG:
Am 02.11.2012 00:36, schrieb Josh Durgin:
On 11/01/2012 04:33 PM, Stefan Priebe wrote:
Hello list,
does rbd support trim / unmap? Or is it planned to support it?
Greets,
Stefan
librbd (and thus qemu) support it. The rbd kernel module does not yet.
See http://ceph.com/docs/master/rbd/qemu-rbd/#enabling-discard-trim
Thanks! Is there any recommanded value for discard_granularity? With
fstrim and iscsi i use 128kb.
Stefan
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