Re: [Gluster-users] 3.7.13 & proxmox/qemu

[Krutika Dhananjay <kdhananj@xxxxxxxxxx>]

FYI, there's been some progress on this issue and the same has been updated on ovirt-users ML:

http://lists.ovirt.org/pipermail/users/2016-July/041413.html

-Krutika

On Fri, Jul 22, 2016 at 11:23 PM, David Gossage <dgossage@xxxxxxxxxxxxxxxxxx> wrote:

On Fri, Jul 22, 2016 at 9:37 AM, Vijay Bellur <vbellur@xxxxxxxxxx> wrote:

On Fri, Jul 22, 2016 at 10:03 AM, Samuli Heinonen <samppah@xxxxxxxxxxxxx> 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@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@gluster-test1 gluster]# gluster volume set gluster network.remote-dio enable
> volume set: success
>
> Writing small file with oflag=direct is ok:
> [root@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@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@gluster-test1 gluster]# gluster volume set gluster features.shard enable
> volume set: success
>
> Writing small file  with oflag=direct is ok:
> [root@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@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?

Not sure if his tests are same as my setup but here is what I end up with

Volume Name: glustershard

Type: Replicate

Volume ID: 0cc4efb6-3836-4caa-b24a-b3afb6e407c3

Status: Started

Number of Bricks: 1 x 3 = 3

Transport-type: tcp

Bricks:

Brick1: 192.168.71.10:/gluster1/shard1/1

Brick2: 192.168.71.11:/gluster1/shard2/1

Brick3: 192.168.71.12:/gluster1/shard3/1

Options Reconfigured:

features.shard-block-size: 64MB

features.shard: on

server.allow-insecure: on

storage.owner-uid: 36

storage.owner-gid: 36

cluster.server-quorum-type: server

cluster.quorum-type: auto

network.remote-dio: enable

cluster.eager-lock: enable

performance.stat-prefetch: off

performance.io-cache: off

performance.quick-read: off

cluster.self-heal-window-size: 1024

cluster.background-self-heal-count: 16

nfs.enable-ino32: off

nfs.addr-namelookup: off

nfs.disable: on

performance.read-ahead: off

performance.readdir-ahead: on

 dd if=/dev/zero of=/rhev/data-center/mnt/glusterSD/192.168.71.11\:_glustershard/ oflag=direct count=100 bs=1M

81e19cd3-ae45-449c-b716-ec3e4ad4c2f0/ __DIRECT_IO_TEST__                    .trashcan/                            

[root@ccengine2 ~]# dd if=/dev/zero of=/rhev/data-center/mnt/glusterSD/192.168.71.11\:_glustershard/81e19cd3-ae45-449c-b716-ec3e4ad4c2f0/images/test oflag=direct count=100 bs=1M

dd: error writing ‘/rhev/data-center/mnt/glusterSD/192.168.71.11:_glustershard/81e19cd3-ae45-449c-b716-ec3e4ad4c2f0/images/test’: Operation not permitted

creates the 64M file in expected location then the shard is 0

# file: gluster1/shard1/1/81e19cd3-ae45-449c-b716-ec3e4ad4c2f0/images/test

security.selinux=0x73797374656d5f753a6f626a6563745f723a756e6c6162656c65645f743a733000

trusted.afr.dirty=0x000000000000000000000000

trusted.bit-rot.version=0x0200000000000000579231f3000e16e7

trusted.gfid=0xec6de302b35f427985639ca3e25d9df0

trusted.glusterfs.shard.block-size=0x0000000004000000

trusted.glusterfs.shard.file-size=0x0000000004000000000000000000000000000000000000010000000000000000

# file: gluster1/shard1/1/.shard/ec6de302-b35f-4279-8563-9ca3e25d9df0.1

security.selinux=0x73797374656d5f753a6f626a6563745f723a756e6c6162656c65645f743a733000

trusted.afr.dirty=0x000000000000000000000000

trusted.gfid=0x2bfd3cc8a727489b9a0474241548fe80

Regards,
Vijay
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