[Gluster-users] Pretty much any operation related to Gluster mounted fs hangs for a while

[Tiago Santos]

Hey guys,

I'm experiencing this weird case for pretty much any command (ls, df, find,
etc) I try to run against a Gluster client filesystem.


Just for you guys to understand what I'm talking about, follows this easy
and simple test I just ran:


root at web3:~# date; time ls -ltrh
/var/www/site-images/templates/assets/prod/temporary/13/user_1339200.png
Mon Jan 26 07:00:27 PST 2015
-rwx---r-- 1 mhmadmin mhmadmin 61K Jan 22 14:37
/var/www/site-images/templates/assets/prod/temporary/13/user_1339200.png

real 0m*33.651s*
user 0m0.001s
sys 0m0.004s
root at web3:~# date; time ls -ltrh
/var/www/site-images/templates/assets/prod/temporary/13/user_1339200.png
Mon Jan 26 07:01:03 PST 2015
ls: cannot access
/var/www/site-images/templates/assets/prod/temporary/13/user_1339200.png:
*Input/output
error*

real *1m40.241s*
user 0m0.000s
sys 0m0.003s
root at web3:~# date; time ls -ltrh
/var/www/site-images/templates/assets/prod/temporary/13/user_1339200.png
Mon Jan 26 07:02:51 PST 2015
ls: cannot access
/var/www/site-images/templates/assets/prod/temporary/13/user_1339200.png:
*Input/output
error*

real *0m12.834s*
user 0m0.000s
sys 0m0.003s
root at web3:~# date; time ls -ltrh
/var/www/site-images/templates/assets/prod/temporary/13/user_1339200.png
Mon Jan 26 07:03:10 PST 2015
-rwx---r-- 1 mhmadmin mhmadmin 61K Jan 22 14:37
/var/www/site-images/templates/assets/prod/temporary/13/user_1339200.png

real *2m10.150s*
user 0m0.000s
sys 0m0.005s


Sometimes it passes, but takes a really long time to run a simple command
(this is a 61K file), sometimes I see the Input/output error. The important
thing to mention is that this behavior happens almost all the time. I can
quickly reproduce it if asked.


This is a 2-node gluster setup. Both VMs act as Client and Server (sorry if
I'm not using the correct gluster naming.. I'm getting to know it for weeks
now).


More info:

# gluster --version
glusterfs 3.5.3 built on Nov 18 2014 03:53:25
Repository revision: git://git.gluster.com/glusterfs.git

# df -Th
Filesystem                      Type            Size  Used Avail Use%
Mounted on
/dev/mapper/data_vg-data_lv     ext4           1007G  506G  451G  53%
/export/images1-1
images1.mydomain.com:/site-images fuse.glusterfs 1007G  506G  451G  53%
/var/www/site-images

# uname -a
Linux web3 3.13.0-44-generic #73-Ubuntu SMP Tue Dec 16 00:22:43 UTC 2014
x86_64 x86_64 x86_64 GNU/Linux

# gluster volume info

Volume Name: site-images
Type: Replicate
Volume ID: 68bca3c9-210c-45a9-b2bc-6a0e2ee630bb
Status: Started
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Bricks:
Brick1: images1.mydomain.com:/export/images1-1/brick
Brick2: images2.mydomain.com:/export/images2-1/brick



Would anyone help me identify what is going on here?


Thanks in advance!

-- 
*Tiago Santos*
MustHaveMenus.com
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