Re: [Gluster-users] heal hanging

David Robinson <david.robinson@xxxxxxxxxxxxx> · Mon, 25 Jan 2016 17:01:10 +0000

The logfile is attached from what I think might have been the problem node.
I have also attached a second log file from a node that may have been contributing to the issue.  I am not sure about the 2nd one, but I thought I would include it for completeness.

David

------ Original Message ------
From: "Pranith Kumar Karampuri" <pkarampu@xxxxxxxxxx>
To: "David Robinson" <drobinson@xxxxxxxxxxxxx>; "Glomski, Patrick" <patrick.glomski@xxxxxxxxxxxxx>
Cc: "gluster-users@xxxxxxxxxxx" <gluster-users@xxxxxxxxxxx>; "Gluster Devel" <gluster-devel@xxxxxxxxxxx>
Sent: 1/24/2016 11:02:04 PM
Subject: Re: [Gluster-users]  heal hanging

On 01/25/2016 09:11 AM, David Robinson wrote:

A lot more than 128-clients.  Well over 1000.  And, I believe we might have found the problem and it looks like you were headed in the right direction as it appears to be a problem with one of the clients FUSE mounts.  

When we couldn't resolve the issue, I started moving all of my users off of the gluster storage system as it was no longer responsive.  After moving all of them off, I tried to kill all of the clients that had homegfs mounted by doing a 'killall glusterfs' on all of the machines connected to gluster.  There was one machine where even after killing all of the glusterfs processes and checking to make sure no glusterfs was running, 'mount' still showed the FUSE mount.  After I did a 'umount -lf /homegfs' it finally went away.  

After I killed the client mounts and restarted all of them, we haven't had any more issues with out of control loads on the storage systems.  We had seen this before with a runaway FUSE mount, but we found the problem by looking at the load on all of the clients.  The one problem node had an extremely high load that was out of the norm.  When we went to that machine and did a reset of the FUSE mount, it cleared the problem.  In this case, there was no indication of which of the clients was causing the issue and the only way to figure it out was to take the storage system out of production use.  

My understanding is that the FUSE clients writes to both pairs in the replica at the same time.  Does it make sense that it stopped writing to one of the pairs, and therefore, everything that was written by that FUSE mount had to be healed?  In a normal scenario, there shouldn't be any (or very few) heals, right? 

Is there any better way to trace out this issue in the future?  Is there a way to figure out which mount is not connected properly or which mount is causing all of the heals?  Or, alternatively, is there a way to force all of the clients to remount without going to all of the clients and killing the glusterfs process?  This obviously becomes difficult in a scenario when you have thousands of clients connected.

You are the only responsive user I know with this kind of setup where there are a lot of mounts connected to the Volume. Most of the corner case bugs in the client table expand logic (Which is hit if we have more than 128 clients) are found by you from Oct-2014 when I started assisting you :-). Your inputs are valuable here. Please provide the log file of the bad mount to see what it was doing. I will think a bit more about the enhancements we need to do to make debugging easier in your case.

Pranith

David

------ Original Message ------
From: "Pranith Kumar Karampuri" <pkarampu@xxxxxxxxxx>
To: "Glomski, Patrick" <patrick.glomski@xxxxxxxxxxxxx>
Cc: "David Robinson" <drobinson@xxxxxxxxxxxxx>; mailto:gluster-users@xxxxxxxxxxx <gluster-users@xxxxxxxxxxx>; "Gluster Devel" <gluster-devel@xxxxxxxxxxx>
Sent: 1/24/2016 10:22:04 PM
Subject: Re: [Gluster-users]  heal hanging

You guys use more than 128 clients don't you? We recently found a memory corruption in client-table which is used in locking. I wonder if it has some role to play here.
http://review.gluster.org/13241 is the fix. Could you see if you are seeing this issue even after this fix?

Pranith

On 01/22/2016 08:36 AM, Glomski, Patrick wrote:

Pranith, attached are stack traces collected every second for 20 seconds from the high-%cpu glusterfsd process.

Patrick

On Thu, Jan 21, 2016 at 9:46 PM, Glomski, Patrick <patrick.glomski@xxxxxxxxxxxxx> wrote:

Last entry for get_real_filename on any of the bricks was when we turned off the samba gfapi vfs plugin earlier today:

/var/log/glusterfs/bricks/data-brick01a-homegfs.log:[2016-01-21 15:13:00.008239] E [server-rpc-fops.c:768:server_getxattr_cbk] 0-homegfs-server: 105: GETXATTR /wks_backup (40e582d6-b0c7-4099-ba88-9168a3c32ca6) (glusterfs.get_real_filename:desktop.ini) ==> (Permission denied)

We'll get back to you with those traces when %cpu spikes again. As with most sporadic problems, as soon as you want something out of it, the issue becomes harder to reproduce.

On Thu, Jan 21, 2016 at 9:21 PM, Pranith Kumar Karampuri <pkarampu@xxxxxxxxxx> wrote:

On 01/22/2016 07:25 AM, Glomski, Patrick wrote:

Unfortunately, all samba mounts to the gluster volume through the gfapi vfs plugin have been disabled for the last 6 hours or so and frequency of %cpu spikes is increased. We had switched to sharing a fuse mount through samba, but I just disabled that as well. There are no samba shares of this volume now. The spikes now happen every thirty minutes or so. We've resorted to just rebooting the machine with high load for the present.

Could you see if the logs of following type are not at all coming?
[2016-01-21 15:13:00.005736] E [server-rpc-fops.c:768:server_getxattr_cbk] 0-homegfs-server: 110: GETXATTR /wks_backup (40e582d6-b0c7-4099-ba88-9168a3c
32ca6) (glusterfs.get_real_filename:desktop.ini) ==> (Permission denied)

These are operations that failed. Operations that succeed are the ones that will scan the directory. But I don't have a way to find them other than using tcpdumps.

At the moment I have 2 theories:
1) these get_real_filename calls
2) [2016-01-21 16:10:38.017828] E [server-helpers.c:46:gid_resolve] 0-gid-cache: getpwuid_r(494) failed
"

Yessir they are.  Normally, sssd would look to the local cache file in /var/lib/sss/db/ first, to get any group or userid information, then go out to the domain controller.  I put the options that we are using on our GFS volumes below…  Thanks for your help.

We had been running sssd with sssd_nss and sssd_be sub-processes on these systems for a long time, under the GFS 3.5.2 code, and not run into the problem that David described with the high cpu usage on sssd_nss.
"
That was Tom Young's email 1.5 years back when we debugged it. But the process which was consuming lot of cpu is sssd_nss. So I am not sure if it is same issue. Let us debug to see '1)' doesn't happen. The gstack traces I asked for should also help. 

Pranith

On Thu, Jan 21, 2016 at 8:49 PM, Pranith Kumar Karampuri <pkarampu@xxxxxxxxxx> wrote:

On 01/22/2016 07:13 AM, Glomski, Patrick wrote:

We use the samba glusterfs virtual filesystem (the current version provided on download.gluster.org), but no windows clients connecting directly.

Hmm.. Is there a way to disable using this and check if the CPU% still increases? What getxattr of "glusterfs.get_real_filename <filanme>" does is to scan the entire directory looking for strcasecmp(<filname>, <scanned-filename>). If anything matches then it will return the <scanned-filename>. But the problem is the scan is costly. So I wonder if this is the reason for the CPU spikes.

Pranith 

On Thu, Jan 21, 2016 at 8:37 PM, Pranith Kumar Karampuri <pkarampu@xxxxxxxxxx> wrote:

Do you have any windows clients? I see a lot of getxattr calls for "glusterfs.get_real_filename" which lead to full readdirs of the directories on the brick.

Pranith

On 01/22/2016 12:51 AM, Glomski, Patrick wrote:

Pranith, could this kind of behavior be self-inflicted by us deleting files directly from the bricks? We have done that in the past to clean up an issues where gluster wouldn't allow us to delete from the mount.

If so, is it feasible to clean them up by running a search on the .glusterfs directories directly and removing files with a reference count of 1 that are non-zero size (or directly checking the xattrs to be sure that it's not a DHT link). 

find /data/brick01a/homegfs/.glusterfs -type f -not -empty -links -2 -exec rm -f "{}" \;

Is there anything I'm inherently missing with that approach that will further corrupt the system?

On Thu, Jan 21, 2016 at 1:02 PM, Glomski, Patrick <patrick.glomski@xxxxxxxxxxxxx> wrote:

Load spiked again: ~1200%cpu on gfs02a for glusterfsd. Crawl has been running on one of the bricks on gfs02b for 25 min or so and users cannot access the volume.

I re-listed the xattrop directories as well as a 'top' entry and heal statistics. Then I restarted the gluster services on gfs02a. 

=================== top ===================
PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                 
 8969 root      20   0 2815m 204m 3588 S 1181.0  0.6 591:06.93 glusterfsd         

=================== xattrop ===================
/data/brick01a/homegfs/.glusterfs/indices/xattrop:
xattrop-41f19453-91e4-437c-afa9-3b25614de210  xattrop-9b815879-2f4d-402b-867c-a6d65087788c

/data/brick02a/homegfs/.glusterfs/indices/xattrop:
xattrop-70131855-3cfb-49af-abce-9d23f57fb393  xattrop-dfb77848-a39d-4417-a725-9beca75d78c6

/data/brick01b/homegfs/.glusterfs/indices/xattrop:
e6e47ed9-309b-42a7-8c44-28c29b9a20f8          xattrop-5c797a64-bde7-4eac-b4fc-0befc632e125
xattrop-38ec65a1-00b5-4544-8a6c-bf0f531a1934  xattrop-ef0980ad-f074-4163-979f-16d5ef85b0a0

/data/brick02b/homegfs/.glusterfs/indices/xattrop:
xattrop-7402438d-0ee7-4fcf-b9bb-b561236f99bc  xattrop-8ffbf5f7-ace3-497d-944e-93ac85241413

/data/brick01a/homegfs/.glusterfs/indices/xattrop:
xattrop-0115acd0-caae-4dfd-b3b4-7cc42a0ff531

/data/brick02a/homegfs/.glusterfs/indices/xattrop:
xattrop-7e20fdb1-5224-4b9a-be06-568708526d70

/data/brick01b/homegfs/.glusterfs/indices/xattrop:
8034bc06-92cd-4fa5-8aaf-09039e79d2c8  c9ce22ed-6d8b-471b-a111-b39e57f0b512
94fa1d60-45ad-4341-b69c-315936b51e8d  xattrop-9c04623a-64ce-4f66-8b23-dbaba49119c7

/data/brick02b/homegfs/.glusterfs/indices/xattrop:
xattrop-b8c8f024-d038-49a2-9a53-c54ead09111d

=================== heal stats ===================

homegfs [b0-gfsib01a] : Starting time of crawl       : Thu Jan 21 12:36:45 2016
homegfs [b0-gfsib01a] : Ending time of crawl         : Thu Jan 21 12:36:45 2016
homegfs [b0-gfsib01a] : Type of crawl: INDEX
homegfs [b0-gfsib01a] : No. of entries healed        : 0
homegfs [b0-gfsib01a] : No. of entries in split-brain: 0
homegfs [b0-gfsib01a] : No. of heal failed entries   : 0

homegfs [b1-gfsib01b] : Starting time of crawl       : Thu Jan 21 12:36:19 2016
homegfs [b1-gfsib01b] : Ending time of crawl         : Thu Jan 21 12:36:19 2016
homegfs [b1-gfsib01b] : Type of crawl: INDEX
homegfs [b1-gfsib01b] : No. of entries healed        : 0
homegfs [b1-gfsib01b] : No. of entries in split-brain: 0
homegfs [b1-gfsib01b] : No. of heal failed entries   : 1

homegfs [b2-gfsib01a] : Starting time of crawl       : Thu Jan 21 12:36:48 2016
homegfs [b2-gfsib01a] : Ending time of crawl         : Thu Jan 21 12:36:48 2016
homegfs [b2-gfsib01a] : Type of crawl: INDEX
homegfs [b2-gfsib01a] : No. of entries healed        : 0
homegfs [b2-gfsib01a] : No. of entries in split-brain: 0
homegfs [b2-gfsib01a] : No. of heal failed entries   : 0

homegfs [b3-gfsib01b] : Starting time of crawl       : Thu Jan 21 12:36:47 2016
homegfs [b3-gfsib01b] : Ending time of crawl         : Thu Jan 21 12:36:47 2016
homegfs [b3-gfsib01b] : Type of crawl: INDEX
homegfs [b3-gfsib01b] : No. of entries healed        : 0
homegfs [b3-gfsib01b] : No. of entries in split-brain: 0
homegfs [b3-gfsib01b] : No. of heal failed entries   : 0

homegfs [b4-gfsib02a] : Starting time of crawl       : Thu Jan 21 12:36:06 2016
homegfs [b4-gfsib02a] : Ending time of crawl         : Thu Jan 21 12:36:06 2016
homegfs [b4-gfsib02a] : Type of crawl: INDEX
homegfs [b4-gfsib02a] : No. of entries healed        : 0
homegfs [b4-gfsib02a] : No. of entries in split-brain: 0
homegfs [b4-gfsib02a] : No. of heal failed entries   : 0

homegfs [b5-gfsib02b] : Starting time of crawl       : Thu Jan 21 12:13:40 2016
homegfs [b5-gfsib02b] :                                *** Crawl is in progress ***
homegfs [b5-gfsib02b] : Type of crawl: INDEX
homegfs [b5-gfsib02b] : No. of entries healed        : 0
homegfs [b5-gfsib02b] : No. of entries in split-brain: 0
homegfs [b5-gfsib02b] : No. of heal failed entries   : 0

homegfs [b6-gfsib02a] : Starting time of crawl       : Thu Jan 21 12:36:58 2016
homegfs [b6-gfsib02a] : Ending time of crawl         : Thu Jan 21 12:36:58 2016
homegfs [b6-gfsib02a] : Type of crawl: INDEX
homegfs [b6-gfsib02a] : No. of entries healed        : 0
homegfs [b6-gfsib02a] : No. of entries in split-brain: 0
homegfs [b6-gfsib02a] : No. of heal failed entries   : 0

homegfs [b7-gfsib02b] : Starting time of crawl       : Thu Jan 21 12:36:50 2016
homegfs [b7-gfsib02b] : Ending time of crawl         : Thu Jan 21 12:36:50 2016
homegfs [b7-gfsib02b] : Type of crawl: INDEX
homegfs [b7-gfsib02b] : No. of entries healed        : 0
homegfs [b7-gfsib02b] : No. of entries in split-brain: 0
homegfs [b7-gfsib02b] : No. of heal failed entries   : 0

========================================================================================
I waited a few minutes for the heals to finish and ran the heal statistics and info again. one file is in split-brain. Aside from the split-brain, the load on all systems is down now and they are behaving normally. glustershd.log is attached. What is going on??? 

Thu Jan 21 12:53:50 EST 2016

=================== homegfs ===================

homegfs [b0-gfsib01a] : Starting time of crawl       : Thu Jan 21 12:53:02 2016
homegfs [b0-gfsib01a] : Ending time of crawl         : Thu Jan 21 12:53:02 2016
homegfs [b0-gfsib01a] : Type of crawl: INDEX
homegfs [b0-gfsib01a] : No. of entries healed        : 0
homegfs [b0-gfsib01a] : No. of entries in split-brain: 0
homegfs [b0-gfsib01a] : No. of heal failed entries   : 0

homegfs [b1-gfsib01b] : Starting time of crawl       : Thu Jan 21 12:53:38 2016
homegfs [b1-gfsib01b] : Ending time of crawl         : Thu Jan 21 12:53:38 2016
homegfs [b1-gfsib01b] : Type of crawl: INDEX
homegfs [b1-gfsib01b] : No. of entries healed        : 0
homegfs [b1-gfsib01b] : No. of entries in split-brain: 0
homegfs [b1-gfsib01b] : No. of heal failed entries   : 1

homegfs [b2-gfsib01a] : Starting time of crawl       : Thu Jan 21 12:53:04 2016
homegfs [b2-gfsib01a] : Ending time of crawl         : Thu Jan 21 12:53:04 2016
homegfs [b2-gfsib01a] : Type of crawl: INDEX
homegfs [b2-gfsib01a] : No. of entries healed        : 0
homegfs [b2-gfsib01a] : No. of entries in split-brain: 0
homegfs [b2-gfsib01a] : No. of heal failed entries   : 0

homegfs [b3-gfsib01b] : Starting time of crawl       : Thu Jan 21 12:53:04 2016
homegfs [b3-gfsib01b] : Ending time of crawl         : Thu Jan 21 12:53:04 2016
homegfs [b3-gfsib01b] : Type of crawl: INDEX
homegfs [b3-gfsib01b] : No. of entries healed        : 0
homegfs [b3-gfsib01b] : No. of entries in split-brain: 0
homegfs [b3-gfsib01b] : No. of heal failed entries   : 0

homegfs [b4-gfsib02a] : Starting time of crawl       : Thu Jan 21 12:53:33 2016
homegfs [b4-gfsib02a] : Ending time of crawl         : Thu Jan 21 12:53:33 2016
homegfs [b4-gfsib02a] : Type of crawl: INDEX
homegfs [b4-gfsib02a] : No. of entries healed        : 0
homegfs [b4-gfsib02a] : No. of entries in split-brain: 0
homegfs [b4-gfsib02a] : No. of heal failed entries   : 1

homegfs [b5-gfsib02b] : Starting time of crawl       : Thu Jan 21 12:53:14 2016
homegfs [b5-gfsib02b] : Ending time of crawl         : Thu Jan 21 12:53:15 2016
homegfs [b5-gfsib02b] : Type of crawl: INDEX
homegfs [b5-gfsib02b] : No. of entries healed        : 0
homegfs [b5-gfsib02b] : No. of entries in split-brain: 0
homegfs [b5-gfsib02b] : No. of heal failed entries   : 3

homegfs [b6-gfsib02a] : Starting time of crawl       : Thu Jan 21 12:53:04 2016
homegfs [b6-gfsib02a] : Ending time of crawl         : Thu Jan 21 12:53:04 2016
homegfs [b6-gfsib02a] : Type of crawl: INDEX
homegfs [b6-gfsib02a] : No. of entries healed        : 0
homegfs [b6-gfsib02a] : No. of entries in split-brain: 0
homegfs [b6-gfsib02a] : No. of heal failed entries   : 0

homegfs [b7-gfsib02b] : Starting time of crawl       : Thu Jan 21 12:53:09 2016
homegfs [b7-gfsib02b] : Ending time of crawl         : Thu Jan 21 12:53:09 2016
homegfs [b7-gfsib02b] : Type of crawl: INDEX
homegfs [b7-gfsib02b] : No. of entries healed        : 0
homegfs [b7-gfsib02b] : No. of entries in split-brain: 0
homegfs [b7-gfsib02b] : No. of heal failed entries   : 0

*** gluster bug in 'gluster volume heal homegfs statistics'   ***
*** Use 'gluster volume heal homegfs info' until bug is fixed ***

Brick gfs01a.corvidtec.com:/data/brick01a/homegfs/
Number of entries: 0

Brick gfs01b.corvidtec.com:/data/brick01b/homegfs/
Number of entries: 0

Brick gfs01a.corvidtec.com:/data/brick02a/homegfs/
Number of entries: 0

Brick gfs01b.corvidtec.com:/data/brick02b/homegfs/
Number of entries: 0

Brick gfs02a.corvidtec.com:/data/brick01a/homegfs/
/users/bangell/.gconfd - Is in split-brain

Number of entries: 1

Brick gfs02b.corvidtec.com:/data/brick01b/homegfs/
/users/bangell/.gconfd - Is in split-brain

/users/bangell/.gconfd/saved_state 
Number of entries: 2

Brick gfs02a.corvidtec.com:/data/brick02a/homegfs/
Number of entries: 0

Brick gfs02b.corvidtec.com:/data/brick02b/homegfs/
Number of entries: 0

On Thu, Jan 21, 2016 at 11:10 AM, Pranith Kumar Karampuri <pkarampu@xxxxxxxxxx> wrote:

On 01/21/2016 09:26 PM, Glomski, Patrick wrote:

I should mention that the problem is not currently occurring and there are no heals (output appended). By restarting the gluster services, we can stop the crawl, which lowers the load for a while. Subsequent crawls seem to finish properly. For what it's worth, files/folders that show up in the 'volume info' output during a hung crawl don't seem to be anything out of the ordinary. 

Over the past four days, the typical time before the problem recurs after suppressing it in this manner is an hour. Last night when we reached out to you was the last time it happened and the load has been low since (a relief).  David believes that recursively listing the files (ls -alR or similar) from a client mount can force the issue to happen, but obviously I'd rather not unless we have some precise thing we're looking for. Let me know if you'd like me to attempt to drive the system unstable like that and what I should look for. As it's a production system, I'd rather not leave it in this state for long.

Will it be possible to send glustershd, mount logs of the past 4 days? I would like to see if this is because of directory self-heal going wild (Ravi is working on throttling feature for 3.8, which will allow to put breaks on self-heal traffic)

Pranith 

[root@gfs01a xattrop]# gluster volume heal homegfs info
Brick gfs01a.corvidtec.com:/data/brick01a/homegfs/
Number of entries: 0

Brick gfs01b.corvidtec.com:/data/brick01b/homegfs/
Number of entries: 0

Brick gfs01a.corvidtec.com:/data/brick02a/homegfs/
Number of entries: 0

Brick gfs01b.corvidtec.com:/data/brick02b/homegfs/
Number of entries: 0

Brick gfs02a.corvidtec.com:/data/brick01a/homegfs/
Number of entries: 0

Brick gfs02b.corvidtec.com:/data/brick01b/homegfs/
Number of entries: 0

Brick gfs02a.corvidtec.com:/data/brick02a/homegfs/
Number of entries: 0

Brick gfs02b.corvidtec.com:/data/brick02b/homegfs/
Number of entries: 0

On Thu, Jan 21, 2016 at 10:40 AM, Pranith Kumar Karampuri <pkarampu@xxxxxxxxxx> wrote:

On 01/21/2016 08:25 PM, Glomski, Patrick wrote:

Hello, Pranith. The typical behavior is that the %cpu on a glusterfsd process jumps to number of processor cores available (800% or 1200%, depending on the pair of nodes involved) and the load average on the machine goes very high (~20). The volume's heal statistics output shows that it is crawling one of the bricks and trying to heal, but this crawl hangs and never seems to finish.

The number of files in the xattrop directory varies over time, so I ran a wc -l as you requested periodically for some time and then started including a datestamped list of the files that were in the xattrops directory on each brick to see which were persistent. All bricks had files in the xattrop folder, so all results are attached.
Thanks this info is helpful. I don't see a lot of files. Could you give output of "gluster volume heal <volname> info"? Is there any directory in there which is LARGE?

Pranith 

Please let me know if there is anything else I can provide.

Patrick

On Thu, Jan 21, 2016 at 12:01 AM, Pranith Kumar Karampuri <pkarampu@xxxxxxxxxx> wrote:

hey,
       Which process is consuming so much cpu? I went through the logs you gave me. I see that the following files are in gfid mismatch state:

<066e4525-8f8b-43aa-b7a1-86bbcecc68b9/safebrowsing-backup>,
<1d48754b-b38c-403d-94e2-0f5c41d5f885/recovery.bak>,
<ddc92637-303a-4059-9c56-ab23b1bb6ae9/patch0008.cnvrg>,

Could you give me the output of "ls <brick-path>/indices/xattrop | wc -l" output on all the bricks which are acting this way? This will tell us the number of pending self-heals on the system.

Pranith 

On 01/20/2016 09:26 PM, David Robinson wrote:

resending with parsed logs... 

I am having issues with 3.6.6 where the load will spike up to 800% for one of the glusterfsd processes and the users can no longer access the system.  If I reboot the node, the heal will finish normally after a few minutes and the system will be responsive, but a few hours later the issue will start again.  It look like it is hanging in a heal and spinning up the load on one of the bricks.  The heal gets stuck and says it is crawling and never returns.  After a few minutes of the heal saying it is crawling, the load spikes up and the mounts become unresponsive.

Any suggestions on how to fix this?  It has us stopped cold as the user can no longer access the systems when the load spikes... Logs attached.

System setup info is: 

[root@gfs01a ~]# gluster volume info homegfs

Volume Name: homegfs
Type: Distributed-Replicate
Volume ID: 1e32672a-f1b7-4b58-ba94-58c085e59071
Status: Started
Number of Bricks: 4 x 2 = 8
Transport-type: tcp
Bricks:
Brick1: gfsib01a.corvidtec.com:/data/brick01a/homegfs
Brick2: gfsib01b.corvidtec.com:/data/brick01b/homegfs
Brick3: gfsib01a.corvidtec.com:/data/brick02a/homegfs
Brick4: gfsib01b.corvidtec.com:/data/brick02b/homegfs
Brick5: gfsib02a.corvidtec.com:/data/brick01a/homegfs
Brick6: gfsib02b.corvidtec.com:/data/brick01b/homegfs
Brick7: gfsib02a.corvidtec.com:/data/brick02a/homegfs
Brick8: gfsib02b.corvidtec.com:/data/brick02b/homegfs
Options Reconfigured:
performance.io-thread-count: 32
performance.cache-size: 128MB
performance.write-behind-window-size: 128MB
server.allow-insecure: on
network.ping-timeout: 42
storage.owner-gid: 100
geo-replication.indexing: off
geo-replication.ignore-pid-check: on
changelog.changelog: off
changelog.fsync-interval: 3
changelog.rollover-time: 15
server.manage-gids: on
diagnostics.client-log-level: WARNING

[root@gfs01a ~]# rpm -qa | grep gluster
gluster-nagios-common-0.1.1-0.el6.noarch
glusterfs-fuse-3.6.6-1.el6.x86_64
glusterfs-debuginfo-3.6.6-1.el6.x86_64
glusterfs-libs-3.6.6-1.el6.x86_64
glusterfs-geo-replication-3.6.6-1.el6.x86_64
glusterfs-api-3.6.6-1.el6.x86_64
glusterfs-devel-3.6.6-1.el6.x86_64
glusterfs-api-devel-3.6.6-1.el6.x86_64
glusterfs-3.6.6-1.el6.x86_64
glusterfs-cli-3.6.6-1.el6.x86_64
glusterfs-rdma-3.6.6-1.el6.x86_64
samba-vfs-glusterfs-4.1.11-2.el6.x86_64
glusterfs-server-3.6.6-1.el6.x86_64
glusterfs-extra-xlators-3.6.6-1.el6.x86_64

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