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<font color="#000099">Hi everyone,<br>
<br>
I have trouble understanding the following behavior:<br>
<br>
Suppose I have a replica 2 volume 'testvol' on two servers,
server1 and server2, composed of server1:/bricks/testvol/brick and
server2:/bricks/testvol/brick. Also, suppose it contains a good
number of files.<br>
<br>
Now, assume I remove one of the two bricks, as:</font><br>
<br>
root@server1~# gluster volume remove-brick testvol replica 1
server1:/bricks/testvol/brick<br>
<font color="#000099"><br>
Now, I unmount and delete the logical volume supporting the brick
and then recreate it (with a different size), and mount it the
same way as it was mounted before (at /brick/testvol/). Then, I
re-add it as:</font><br>
<br>
root@server1~# gluster volume add-brick testvol replica 2
server1:/bricks/testvol/brick<br>
<font color="#000099"><br>
I observe that the brick on server1 does not contain any of the
data that was in the volume.</font><br>
<br>
root@server1~# ls /bricks/testvol/brick<br>
root@server1~# <br>
<br>
<font color="#000099">This is all right by me, since glusterfs needs
some time to discover and sync files that are absent on the brick
of server1. In fact, if I leave the setup undisturbed for 15
minutes to half an hour, I find that all data appears within the
brick of server1, just as you would expect. Also, if I wish to
speed up the process, I simply do a ls -Ra on the directory where
the volume is mounted, and all files sync onto server1's brick.
This is also very much as expected.<br>
<br>
However, during the period where data on server1's brick is not
available, if you query the heal info for the volume, gluster cli
reports that 'Number of entries' is '0', and that too all of
'info', 'heal-failed', and 'split-brain'. This is what becomes a
bit of a trouble for me. Fact is, we are attempting to automate
the monitoring of our glusterfs volumes, and we depend upon heal
info alone to decide whether data on server1 and server2 are in
sync. <br>
<br>
Could somebody, therefore, help me with the following questions?<br>
a) Which files exactly show up in heal info?<br>
b) What exactly should I look to monitor if we are to ascertain
that data on our servers are in sync?<br>
<br>
Thanks a lot for your responses!</font><br>
<font color="#000099"><br>
Anirban<br>
<br>
P.s. I am using glusterfs 3.4.2 over linux kernel version 2.6.34.<br>
</font><br>
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