[Bugs] [Bug 1360785] Direct io to sharded files fails when on zfs backend

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1360785



--- Comment #1 from David <dgossage at carouselchecks.com> ---
in oVirt mailing list was asked to test these settings

i. Set network.remote-dio to off
        # gluster volume set <VOL> network.remote-dio off

ii. Set performance.strict-o-direct to on
        # gluster volume set <VOL> performance.strict-o-direct on

results:

dd if=/dev/zero
of=/rhev/data-center/mnt/glusterSD/192.168.71.10\:_glustershard/5b8a4477-4d87-43a1-aa52-b664b1bd9e08/images/test
oflag=direct count=100 bs=1M
dd: error writing
‘/rhev/data-center/mnt/glusterSD/192.168.71.10:_glustershard/5b8a4477-4d87-43a1-aa52-b664b1bd9e08/images/test’:
Invalid argument
dd: closing output file
‘/rhev/data-center/mnt/glusterSD/192.168.71.10:_glustershard/5b8a4477-4d87-43a1-aa52-b664b1bd9e08/images/test’:
Invalid argument


[2016-07-25 18:20:19.393121] E [MSGID: 113039] [posix.c:2939:posix_open]
0-glustershard-posix: open on
/gluster2/brick1/1/.glusterfs/02/f4/02f4783b-2799-46d9-b787-53e4ccd9a052,
flags: 16385 [Invalid argument]
[2016-07-25 18:20:19.393204] E [MSGID: 115070]
[server-rpc-fops.c:1568:server_open_cbk] 0-glustershard-server: 120: OPEN
/5b8a4477-4d87-43a1-aa52-b664b1bd9e08/images/test
(02f4783b-2799-46d9-b787-53e4ccd9a052) ==> (Invalid argument) [Invalid
argument]


and
/var/log/glusterfs/rhev-data-center-mnt-glusterSD-192.168.71.10\:_glustershard.log
[2016-07-25 18:20:19.393275] E [MSGID: 114031]
[client-rpc-fops.c:466:client3_3_open_cbk] 0-glustershard-client-0: remote
operation failed. Path: /5b8a4477-4d87-43a1-aa52-b664b1bd9e08/images/test
(02f4783b-2799-46d9-b787-53e4ccd9a052) [Invalid argument]
[2016-07-25 18:20:19.393270] E [MSGID: 114031]
[client-rpc-fops.c:466:client3_3_open_cbk] 0-glustershard-client-1: remote
operation failed. Path: /5b8a4477-4d87-43a1-aa52-b664b1bd9e08/images/test
(02f4783b-2799-46d9-b787-53e4ccd9a052) [Invalid argument]
[2016-07-25 18:20:19.393317] E [MSGID: 114031]
[client-rpc-fops.c:466:client3_3_open_cbk] 0-glustershard-client-2: remote
operation failed. Path: /5b8a4477-4d87-43a1-aa52-b664b1bd9e08/images/test
(02f4783b-2799-46d9-b787-53e4ccd9a052) [Invalid argument]
[2016-07-25 18:20:19.393357] W [fuse-bridge.c:2311:fuse_writev_cbk]
0-glusterfs-fuse: 117: WRITE => -1 gfid=02f4783b-2799-46d9-b787-53e4ccd9a052
fd=0x7f5fec0ba08c (Invalid argument)
[2016-07-25 18:20:19.393389] W [fuse-bridge.c:2311:fuse_writev_cbk]
0-glusterfs-fuse: 118: WRITE => -1 gfid=02f4783b-2799-46d9-b787-53e4ccd9a052
fd=0x7f5fec0ba08c (Invalid argument)
[2016-07-25 18:20:19.393611] W [fuse-bridge.c:2311:fuse_writev_cbk]
0-glusterfs-fuse: 119: WRITE => -1 gfid=02f4783b-2799-46d9-b787-53e4ccd9a052
fd=0x7f5fec0ba08c (Invalid argument)
[2016-07-25 18:20:19.393708] W [fuse-bridge.c:2311:fuse_writev_cbk]
0-glusterfs-fuse: 120: WRITE => -1 gfid=02f4783b-2799-46d9-b787-53e4ccd9a052
fd=0x7f5fec0ba08c (Invalid argument)
[2016-07-25 18:20:19.393771] W [fuse-bridge.c:2311:fuse_writev_cbk]
0-glusterfs-fuse: 121: WRITE => -1 gfid=02f4783b-2799-46d9-b787-53e4ccd9a052
fd=0x7f5fec0ba08c (Invalid argument)
[2016-07-25 18:20:19.393840] W [fuse-bridge.c:2311:fuse_writev_cbk]
0-glusterfs-fuse: 122: WRITE => -1 gfid=02f4783b-2799-46d9-b787-53e4ccd9a052
fd=0x7f5fec0ba08c (Invalid argument)
[2016-07-25 18:20:19.393914] W [fuse-bridge.c:2311:fuse_writev_cbk]
0-glusterfs-fuse: 123: WRITE => -1 gfid=02f4783b-2799-46d9-b787-53e4ccd9a052
fd=0x7f5fec0ba08c (Invalid argument)
[2016-07-25 18:20:19.393982] W [fuse-bridge.c:2311:fuse_writev_cbk]
0-glusterfs-fuse: 124: WRITE => -1 gfid=02f4783b-2799-46d9-b787-53e4ccd9a052
fd=0x7f5fec0ba08c (Invalid argument)
[2016-07-25 18:20:19.394045] W [fuse-bridge.c:709:fuse_truncate_cbk]
0-glusterfs-fuse: 125: FTRUNCATE() ERR => -1 (Invalid argument)
[2016-07-25 18:20:19.394338] W [fuse-bridge.c:1290:fuse_err_cbk]
0-glusterfs-fuse: 126: FLUSH() ERR => -1 (Invalid argument)

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