[Gluster-users] df does not show full volume capacity after update to 3.12.4
Freer, Eva B.
freereb at ornl.gov
Wed Jan 31 16:20:37 UTC 2018
The values for shared-brick-count are still the same. I did not re-start the volume after setting the cluster.min-free-inodes to 6%. Do I need to restart it?
Thanks,
Eva (865) 574-6894
From: Nithya Balachandran <nbalacha at redhat.com>
Date: Wednesday, January 31, 2018 at 11:14 AM
To: Eva Freer <freereb at ornl.gov>
Cc: "Greene, Tami McFarlin" <greenet at ornl.gov>, "gluster-users at gluster.org" <gluster-users at gluster.org>, Amar Tumballi <atumball at redhat.com>
Subject: Re: [Gluster-users] df does not show full volume capacity after update to 3.12.4
On 31 January 2018 at 21:34, Freer, Eva B. <freereb at ornl.gov<mailto:freereb at ornl.gov>> wrote:
Nithya,
Responding to an earlier question: Before the upgrade, we were at 3.103 on these servers, but some of the clients were 3.7.6. From below, does this mean that “shared-brick-count” needs to be set to 1 for all bricks.
All of the bricks are on separate xfs partitions composed hardware of RAID 6 volumes. LVM is not used. The current setting for cluster.min-free-inodes was 5%. I changed it to 6% per your instructions below. The df output is still the same, but I haven’t done the
find /var/lib/glusterd/vols -type f|xargs sed -i -e 's/option shared-brick-count [0-9]*/option shared-brick-count 1/g'
Should I go ahead and do this?
Can you check if the values have been changed in the .vol files before you try this?
These files will be regenerated every time the volume is changed so changing them directly may not be permanent. I was hoping setting the cluster.min-free-inodes would have corrected this automatically and helped us figure out what was happening as we have not managed to reproduce this issue yet.
Output of stat –f for all the bricks:
[root at jacen ~]# stat -f /bricks/data_A*
File: "/bricks/data_A1"
ID: 80100000000 Namelen: 255 Type: xfs
Block size: 4096 Fundamental block size: 4096
Blocks: Total: 15626471424 Free: 4530515093 Available: 4530515093
Inodes: Total: 1250159424 Free: 1250028064
File: "/bricks/data_A2"
ID: 81100000000 Namelen: 255 Type: xfs
Block size: 4096 Fundamental block size: 4096
Blocks: Total: 15626471424 Free: 3653183901 Available: 3653183901
Inodes: Total: 1250159424 Free: 1250029262
File: "/bricks/data_A3"
ID: 82100000000 Namelen: 255 Type: xfs
Block size: 4096 Fundamental block size: 4096
Blocks: Total: 15626471424 Free: 15134840607 Available: 15134840607
Inodes: Total: 1250159424 Free: 1250128031
File: "/bricks/data_A4"
ID: 83100000000 Namelen: 255 Type: xfs
Block size: 4096 Fundamental block size: 4096
Blocks: Total: 15626471424 Free: 15626461604 Available: 15626461604
Inodes: Total: 1250159424 Free: 1250153857
[root at jaina dataeng]# stat -f /bricks/data_B*
File: "/bricks/data_B1"
ID: 80100000000 Namelen: 255 Type: xfs
Block size: 4096 Fundamental block size: 4096
Blocks: Total: 15626471424 Free: 5689640723 Available: 5689640723
Inodes: Total: 1250159424 Free: 1250047934
File: "/bricks/data_B2"
ID: 81100000000 Namelen: 255 Type: xfs
Block size: 4096 Fundamental block size: 4096
Blocks: Total: 15626471424 Free: 6623312785 Available: 6623312785
Inodes: Total: 1250159424 Free: 1250048131
File: "/bricks/data_B3"
ID: 82100000000 Namelen: 255 Type: xfs
Block size: 4096 Fundamental block size: 4096
Blocks: Total: 15626471424 Free: 15106888485 Available: 15106888485
Inodes: Total: 1250159424 Free: 1250122139
File: "/bricks/data_B4"
ID: 83100000000 Namelen: 255 Type: xfs
Block size: 4096 Fundamental block size: 4096
Blocks: Total: 15626471424 Free: 15626461604 Available: 15626461604
Inodes: Total: 1250159424 Free: 1250153857
Thanks,
Eva (865) 574-6894
From: Nithya Balachandran <nbalacha at redhat.com<mailto:nbalacha at redhat.com>>
Date: Wednesday, January 31, 2018 at 10:46 AM
To: Eva Freer <freereb at ornl.gov<mailto:freereb at ornl.gov>>, "Greene, Tami McFarlin" <greenet at ornl.gov<mailto:greenet at ornl.gov>>
Cc: Amar Tumballi <atumball at redhat.com<mailto:atumball at redhat.com>>
Subject: Re: [Gluster-users] df does not show full volume capacity after update to 3.12.4
Thank you Eva.
From the files you sent:
dataeng.jacen.bricks-data_A1-dataeng.vol: option shared-brick-count 2
dataeng.jacen.bricks-data_A2-dataeng.vol: option shared-brick-count 2
dataeng.jacen.bricks-data_A3-dataeng.vol: option shared-brick-count 1
dataeng.jacen.bricks-data_A4-dataeng.vol: option shared-brick-count 1
dataeng.jaina.bricks-data_B1-dataeng.vol: option shared-brick-count 0
dataeng.jaina.bricks-data_B2-dataeng.vol: option shared-brick-count 0
dataeng.jaina.bricks-data_B3-dataeng.vol: option shared-brick-count 0
dataeng.jaina.bricks-data_B4-dataeng.vol: option shared-brick-count 0
Are all of these bricks on separate Filesystem partitions? If yes, can you please try running the following on one of the gluster nodes and see if the df output works post that?
gluster v set dataeng cluster.min-free-inodes 6%
If it doesn;t work, please send us the stat -f output for each brick.
Regards,
Nithya
On 31 January 2018 at 20:41, Freer, Eva B. <freereb at ornl.gov<mailto:freereb at ornl.gov>> wrote:
Nithya,
The file for one of the servers is attached.
Thanks,
Eva (865) 574-6894
From: Nithya Balachandran <nbalacha at redhat.com<mailto:nbalacha at redhat.com>>
Date: Wednesday, January 31, 2018 at 1:17 AM
To: Eva Freer <freereb at ornl.gov<mailto:freereb at ornl.gov>>
Cc: "gluster-users at gluster.org<mailto:gluster-users at gluster.org>" <gluster-users at gluster.org<mailto:gluster-users at gluster.org>>, "Greene, Tami McFarlin" <greenet at ornl.gov<mailto:greenet at ornl.gov>>
Subject: Re: [Gluster-users] df does not show full volume capacity after update to 3.12.4
I found this on the mailing list:
I found the issue.
The CentOS 7 RPMs, upon upgrade, modifies the .vol files. Among other things, it adds "option shared-brick-count \d", using the number of bricks in the volume.
This gives you an average free space per brick, instead of total free space in the volume.
When I create a new volume, the value of "shared-brick-count" is "1".
find /var/lib/glusterd/vols -type f|xargs sed -i -e 's/option shared-brick-count [0-9]*/option shared-brick-count 1/g'
Eva, can you send me the contents of the /var/lib/glusterd/<volname> folder from any one node so I can confirm if this is the problem?
Regards,
Nithya
On 31 January 2018 at 10:47, Nithya Balachandran <nbalacha at redhat.com<mailto:nbalacha at redhat.com>> wrote:
Hi Eva,
One more question. What version of gluster were you running before the upgrade?
Thanks,
Nithya
On 31 January 2018 at 09:52, Nithya Balachandran <nbalacha at redhat.com<mailto:nbalacha at redhat.com>> wrote:
Hi Eva,
Can you send us the following:
gluster volume info
gluster volume status
The log files and tcpdump for df on a fresh mount point for that volume.
Thanks,
Nithya
On 31 January 2018 at 07:17, Freer, Eva B. <freereb at ornl.gov<mailto:freereb at ornl.gov>> wrote:
After OS update to CentOS 7.4 or RedHat 6.9 and update to Gluster 3.12.4, the ‘df’ command shows only part of the available space on the mount point for multi-brick volumes. All nodes are at 3.12.4. This occurs on both servers and clients.
We have 2 different server configurations.
Configuration 1: A distributed volume of 8 bricks with 4 on each server. The initial configuration had 4 bricks of 59TB each with 2 on each server. Prior to the update to CentOS 7.4 and gluster 3.12.4, ‘df’ correctly showed the size for the volume as 233TB. After the update, we added 2 bricks with 1 on each server, but the output of ‘df’ still only listed 233TB for the volume. We added 2 more bricks, again with 1 on each server. The output of ‘df’ now shows 350TB, but the aggregate of 8 – 59TB bricks should be ~466TB.
Configuration 2: A distributed, replicated volume with 9 bricks on each server for a total of ~350TB of storage. After the server update to RHEL 6.9 and gluster 3.12.4, the volume now shows as having 50TB with ‘df’. No changes were made to this volume after the update.
In both cases, examining the bricks shows that the space and files are still there, just not reported correctly with ‘df’. All machines have been rebooted and the problem persists.
Any help/advice you can give on this would be greatly appreciated.
Thanks in advance.
Eva Freer
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