Am Dienstag, den 07.03.2017, 11:14 +0100 schrieb Ilya Dryomov:
On Tue, Mar 7, 2017 at 10:27 AM, Francois Blondel
<[email protected]<mailto:[email protected]>> wrote:
Hi all,
I have been triyng to use RBD devices on a Erasure Coded data-pool on Ubuntu
Xenial.
I created my block device "blockec2" with :
rbd create blockec2 --size 300G --data-pool ecpool --image-feature
layering,data-pool
(same issue with "rbd create blockec2 --size 300G --data-pool ecpool" )
I maped this block device to a "4.4.0-65-generic #86-Ubuntu SMP Thu Feb 23
17:49:58 UTC 2017 x86_64" Kernel using "rbd-nbd map rbd/blockec2"
Wenn using the block device (mkfs.ext4 for example), i get following errors
in dmesg:
[Fri Mar 3 10:05:25 2017] nbd: registered device at major 43
[Fri Mar 3 10:05:53 2017] block nbd0: Other side returned error (95)
[Fri Mar 3 10:05:53 2017] blk_update_request: I/O error, dev nbd0, sector 0
[Fri Mar 3 10:05:56 2017] block nbd0: Other side returned error (95)
[Fri Mar 3 10:05:56 2017] blk_update_request: I/O error, dev nbd0, sector
8388607
[Fri Mar 3 10:06:06 2017] block nbd0: Other side returned error (95)
[Fri Mar 3 10:06:06 2017] blk_update_request: I/O error, dev nbd0, sector
16777214
Be aware that this functionality is experimental and may eat your data.
If you still want to try it, you need to whitelist it in ceph.conf:
enable experimental unrecoverable data corrupting features =
debug_white_box_testing_ec_overwrites
and do
$ ceph osd pool set ecpool debug_white_box_testing_ec_overwrites true
Thanks a lot, it works [:-)]
Had to force it with --yes-i-really-mean-it :
ceph osd pool set ecpool debug_white_box_testing_ec_overwrites true
--yes-i-really-mean-it
Thanks,
François
Thanks,
Ilya
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