[Gluster-devel] [Gluster-users] 3.7.13 & proxmox/qemu

[Vijay Bellur]

On Fri, Jul 22, 2016 at 10:03 AM, Samuli Heinonen <samppah at neutraali.net> wrote:
> Here is a quick way how to test this:
> GlusterFS 3.7.13 volume with default settings with brick on ZFS dataset. gluster-test1 is server and gluster-test2 is client mounting with FUSE.
>
> Writing file with oflag=direct is not ok:
> [root at gluster-test2 gluster]# dd if=/dev/zero of=file oflag=direct count=1 bs=1024000
> dd: failed to open ‘file’: Invalid argument
>
> Enable network.remote-dio on Gluster Volume:
> [root at gluster-test1 gluster]# gluster volume set gluster network.remote-dio enable
> volume set: success
>
> Writing small file with oflag=direct is ok:
> [root at gluster-test2 gluster]# dd if=/dev/zero of=file oflag=direct count=1 bs=1024000
> 1+0 records in
> 1+0 records out
> 1024000 bytes (1.0 MB) copied, 0.0103793 s, 98.7 MB/s
>
> Writing bigger file with oflag=direct is ok:
> [root at gluster-test2 gluster]# dd if=/dev/zero of=file3 oflag=direct count=100 bs=1M
> 100+0 records in
> 100+0 records out
> 104857600 bytes (105 MB) copied, 1.10583 s, 94.8 MB/s
>
> Enable Sharding on Gluster Volume:
> [root at gluster-test1 gluster]# gluster volume set gluster features.shard enable
> volume set: success
>
> Writing small file  with oflag=direct is ok:
> [root at gluster-test2 gluster]# dd if=/dev/zero of=file3 oflag=direct count=1 bs=1M
> 1+0 records in
> 1+0 records out
> 1048576 bytes (1.0 MB) copied, 0.0115247 s, 91.0 MB/s
>
> Writing bigger file with oflag=direct is not ok:
> [root at gluster-test2 gluster]# dd if=/dev/zero of=file3 oflag=direct count=100 bs=1M
> dd: error writing ‘file3’: Operation not permitted
> dd: closing output file ‘file3’: Operation not permitted
>


Thank you for these tests! would it be possible to share the brick and
client logs?

Regards,
Vijay