I am trying to understand how verify that a replicated volume is up to date.
Here is my scenario. I have a gluster cluster with two nodes serving vm images to ovirt.
I have a volume called vm-store with a brick from each of the nodes:
Volume Name: vm-store
Type: Replicate
Volume ID: 379e52d3-2622-4834-8aef-b255db1c67af
Status: Started
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Bricks:
Brick1: gluster1:/export/brick0
Brick2: gluster0:/export/brick0
Options Reconfigured:
user.cifs: disable
nfs.rpc-auth-allow: *
auth.allow: *
storage.owner-gid: 36
storage.owner-uid: 36
The bricks are formated with xfs using the same options on both servers and the two servers are identical hardware and OS version and release (CentOS 6.5) with glusterfs v 3.4.2 from bits.gluster.org.
I have a 20GB sparse disk image for a VM but I am confused about why I see differend reported disk usage on each of the nodes:
[root@gluster0 ~]# du -sh /export/brick0
48G /export/brick0
[root@gluster0 ~]# du -sh /export/brick0/6d637c7f-a4ab-4510-a0d9-63a04c55d6d8/images/5dfc7c6f-d35d-4831-b2fb-ed9ab8e3392b/5933a44e-77d6-4606-b6a9-bbf7e4235b13
8.6G /export/brick0/6d637c7f-a4ab-4510-a0d9-63a04c55d6d8/images/5dfc7c6f-d35d-4831-b2fb-ed9ab8e3392b/5933a44e-77d6-4606-b6a9-bbf7e4235b13
[root@gluster1 ~]# du -sh /export/brick0
52G /export/brick0
[root@gluster1 ~]# du -sh /export/brick0/6d637c7f-a4ab-4510-a0d9-63a04c55d6d8/images/5dfc7c6f-d35d-4831-b2fb-ed9ab8e3392b/5933a44e-77d6-4606-b6a9-bbf7e4235b13
12G /export/brick0/6d637c7f-a4ab-4510-a0d9-63a04c55d6d8/images/5dfc7c6f-d35d-4831-b2fb-ed9ab8e3392b/5933a44e-77d6-4606-b6a9-bbf7e4235b13
sure enough stat also shows different number of blocks:
[root@gluster0 ~]# stat /export/brick0/6d637c7f-a4ab-4510-a0d9-63a04c55d6d8/images/5dfc7c6f-d35d-4831-b2fb-ed9ab8e3392b/5933a44e-77d6-4606-b6a9-bbf7e4235b13
File: `/export/brick0/6d637c7f-a4ab-4510-a0d9-63a04c55d6d8/images/5dfc7c6f-d35d-4831-b2fb-ed9ab8e3392b/5933a44e-77d6-4606-b6a9-bbf7e4235b13'
Size: 21474836480 Blocks: 17927384 IO Block: 4096 regular file
Device: fd03h/64771d Inode: 1610613256 Links: 2
Access: (0660/-rw-rw----) Uid: ( 36/ vdsm) Gid: ( 36/ kvm)
Access: 2014-02-18 17:06:30.661993000 -0500
Modify: 2014-02-20 13:29:33.507966199 -0500
Change: 2014-02-20 13:29:33.507966199 -0500
[root@gluster1 ~]# stat /export/brick0/6d637c7f-a4ab-4510-a0d9-63a04c55d6d8/images/5dfc7c6f-d35d-4831-b2fb-ed9ab8e3392b/5933a44e-77d6-4606-b6a9-bbf7e4235b13
File: `/export/brick0/6d637c7f-a4ab-4510-a0d9-63a04c55d6d8/images/5dfc7c6f-d35d-4831-b2fb-ed9ab8e3392b/5933a44e-77d6-4606-b6a9-bbf7e4235b13'
Size: 21474836480 Blocks: 24735976 IO Block: 4096 regular file
Device: fd03h/64771d Inode: 3758096942 Links: 2
Access: (0660/-rw-rw----) Uid: ( 36/ vdsm) Gid: ( 36/ kvm)
Access: 2014-02-20 09:30:38.490724245 -0500
Modify: 2014-02-20 13:29:39.464913739 -0500
Change: 2014-02-20 13:29:39.465913754 -0500
Can someone clear up my understanding?
Thanks, Alastair
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