[Gluster-users] df does not show full volume capacity after update to 3.12.4

Wed Jan 31 03:14:28 UTC 2018

Sam,

For du –sh on my newer volume, the result is 161T. The sum of the Used space in the df –h output for all the bricks is ~163T. Close enough for me to believe everything is there. The total for used space in the df –h of the mountpoint it 83T, roughly half what is used.

Relevant lines from df –h on server-A:
Filesystem          Size  Used Avail Use% Mounted on
/dev/sda1            59T   42T   17T  72% /bricks/data_A1
/dev/sdb1            59T   45T   14T  77% /bricks/data_A2
/dev/sdd1            59T   39M   59T   1% /bricks/data_A4
/dev/sdc1            59T  1.9T   57T   4% /bricks/data_A3
server-A:/dataeng   350T   83T  268T  24% /dataeng

And on server-B:
Filesystem         Size  Used Avail Use% Mounted on
/dev/sdb1           59T   34T   25T  58% /bricks/data_B2
/dev/sdc1           59T  2.0T   57T   4% /bricks/data_B3
/dev/sdd1           59T   39M   59T   1% /bricks/data_B4
/dev/sda1           59T   38T   22T  64% /bricks/data_B1
server-B:/dataeng  350T   83T  268T  24% /dataeng

Eva Freer

From: Sam McLeod <mailinglists at smcleod.net>
Date: Tuesday, January 30, 2018 at 9:43 PM
To: Eva Freer <freereb at ornl.gov>
Cc: "gluster-users at gluster.org" <gluster-users at gluster.org>, "Greene, Tami McFarlin" <greenet at ornl.gov>
Subject: Re: [Gluster-users] df does not show full volume capacity after update to 3.12.4

We noticed something similar.

Out of interest, does du -sh . show the same size?

--
Sam McLeod (protoporpoise on IRC)
https://smcleod.net
https://twitter.com/s_mcleod

Words are my own opinions and do not necessarily represent those of my employer or partners.

On 31 Jan 2018, at 12:47 pm, 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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