[Gluster-devel] missing files

[David F. Robinson]

Shyam,

You asked me to stop/start the slow volume to see if it fixed the timing 
issue.  I stopped/started homegfs_backup (the production volume with 40+ 
TB) and it didn't make it faster.  I didn't stop/start the fast volume 
to see if it made it slower.  I just did  that and sent out an email.  I 
saw a similar result as Pranith.

however, I tried this test below and saw no issues.  So, i don't know 
why restart the older volume of test3brick slowed it down but the test 
below shows no slowdown.


#... Create 2-new bricks
gluster volume create test4brick 
gfsib01bkp.corvidtec.com:/data/brick01bkp/test4brick 
gfsib01bkp.corvidtec.com:/data/brick02bkp/test4brick
gluster volume create test5brick 
gfsib01bkp.corvidtec.com:/data/brick01bkp/test5brick 
gfsib01bkp.corvidtec.com:/data/brick02bkp/test5brick
gluster volume start test4brick
gluster volume start test5brick

mount /test4brick
mount /test5brick

cp /root/boost_1_57_0.tar /test4brick
cp /root/boost_1_57_0.tar /test5brick

#... Stop/start test4brick to see if this causes a timing issue
umount /test4brick
gluster volume stop test4brick
gluster volume start test4brick
mount /test4brick


#... Run test on both new bricks
cd /test4brick
time tar -xPf boost_1_57_0.tar; time rm -rf boost_1_57_0

real    1m29.712s
user    0m0.415s
sys     0m2.772s

real    0m18.866s
user    0m0.087s
sys     0m0.556s

cd /test5brick
time tar -xPf boost_1_57_0.tar; time rm -rf boost_1_57_0

real 1m28.243s
user 0m0.366s
sys 0m2.502s

real 0m18.193s
user 0m0.075s
sys 0m0.543s

#... Repeat again after stop/start of test4brick
umount /test4brick
gluster volume stop test4brick
gluster volume start test4brick
mount /test4brick
cd /test4brick
time tar -xPf boost_1_57_0.tar; time rm -rf boost_1_57_0

real    1m25.277s
user    0m0.466s
sys     0m3.107s

real    0m16.575s
user    0m0.084s
sys     0m0.577s

------ Original Message ------
From: "Shyam" <srangana at redhat.com>
To: "Pranith Kumar Karampuri" <pkarampu at redhat.com>; "Justin Clift" 
<justin at gluster.org>
Cc: "Gluster Devel" <gluster-devel at gluster.org>; "David F. Robinson" 
<david.robinson at corvidtec.com>
Sent: 2/12/2015 10:46:14 AM
Subject: Re: [Gluster-devel] missing files

>On 02/12/2015 06:22 AM, Pranith Kumar Karampuri wrote:
>>
>>On 02/12/2015 03:05 PM, Pranith Kumar Karampuri wrote:
>>>
>>>On 02/12/2015 09:14 AM, Justin Clift wrote:
>>>>On 12 Feb 2015, at 03:02, Shyam <srangana at redhat.com> wrote:
>>>>>On 02/11/2015 08:28 AM, David F. Robinson wrote:
>>Just to increase confidence performed one more test. Stopped the 
>>volumes
>>and re-started. Now on both the volumes, the numbers are almost same:
>>
>>[root at gqac031 gluster-mount]# time rm -rf boost_1_57_0 ; time tar xf
>>boost_1_57_0.tar.gz
>>
>>real 1m15.074s
>>user 0m0.550s
>>sys 0m4.656s
>>
>>real 2m46.866s
>>user 0m5.347s
>>sys 0m16.047s
>>
>>[root at gqac031 gluster-mount]# cd /gluster-emptyvol/
>>[root at gqac031 gluster-emptyvol]# ls
>>boost_1_57_0.tar.gz
>>[root at gqac031 gluster-emptyvol]# time tar xf boost_1_57_0.tar.gz
>>
>>real 2m31.467s
>>user 0m5.475s
>>sys 0m15.471s
>>
>>gqas015.sbu.lab.eng.bos.redhat.com:testvol on /gluster-mount type
>>fuse.glusterfs (rw,default_permissions,allow_other,max_read=131072)
>>gqas015.sbu.lab.eng.bos.redhat.com:emotyvol on /gluster-emptyvol type
>>fuse.glusterfs (rw,default_permissions,allow_other,max_read=131072)
>
>If I remember right, we performed a similar test on David's setup, but 
>I believe there was no significant performance gain there. David could 
>you clarify?
>
>Just so we know where we are headed :)
>
>Shyam