<div dir="ltr">From this slide (maybe outdated) it says that reads are also balanced (in replication scenario slide 22):<div><a href="http://www.gluster.org/community/documentation/images/8/80/GlusterFS_Architecture_%26_Roadmap-Vijay_Bellur-LinuxCon_EU_2013.pdf">http://www.gluster.org/community/documentation/images/8/80/GlusterFS_Architecture_%26_Roadmap-Vijay_Bellur-LinuxCon_EU_2013.pdf</a><br></div><div><br></div><div>Except for write, having an option to do only "failover" for reads & lookup would be possible I guess ?</div><div><br></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature">Cordialement,<br>Mathieu CHATEAU<br><a href="http://www.lotp.fr" target="_blank">http://www.lotp.fr</a></div></div>
<br><div class="gmail_quote">2015-06-08 8:11 GMT+02:00 Ravishankar N <span dir="ltr"><<a href="mailto:ravishankar@redhat.com" target="_blank">ravishankar@redhat.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF"><span class="">
<br>
<br>
<div>On 06/08/2015 11:34 AM, Mathieu Chateau
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hello Ravi,
<div><br>
</div>
<div>thanks for clearing things up.</div>
<div><br>
</div>
<div>Anything on the roadmap that would help my case?</div>
</div>
<div class="gmail_extra"><br clear="all">
</div>
</blockquote>
<br>
<br></span>
I don't think it would be possible for clients to do I/O only on its
local brick and yet expect the bricks' contents to be in sync in
real-time..<div><div class="h5"><br>
<br>
<br>
<blockquote type="cite">
<div class="gmail_extra">
<div>
<div>Cordialement,<br>
Mathieu CHATEAU<br>
<a href="http://www.lotp.fr" target="_blank">http://www.lotp.fr</a></div>
</div>
<br>
<div class="gmail_quote">2015-06-08 6:37 GMT+02:00 Ravishankar N
<span dir="ltr"><<a href="mailto:ravishankar@redhat.com" target="_blank">ravishankar@redhat.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF"><span> <br>
<br>
<div>On 06/06/2015 12:49 AM, Mathieu Chateau wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hello,
<div><br>
</div>
<div>sorry to bother again but I am still facing
this issue.</div>
<div><br>
</div>
<div>client still looks on the "other side" and not
using the node declared in fstab:</div>
<div>prd-sta-sto01:/gluster-preprod
/mnt/gluster-preprod glusterfs
defaults,_netdev,backupvolfile-server=prd-sta-sto02
0 0<br>
</div>
<div><br>
</div>
<div>I expect client to use sto01 and not sto02 as
it's available.</div>
</div>
</blockquote>
<br>
</span> Hi Mathieu,<br>
When you do lookups (`ls` etc), they are sent to both
bricks of the replica. If you write to a file, the write
is also sent to both bricks. This is how it works. Only
reads are served from the local brick.<br>
-Ravi
<div>
<div><br>
<br>
<blockquote type="cite">
<div dir="ltr">
<div><br>
</div>
<div>If I add a static route to break connectivity
to sto02 and do a "df", I have around 30s before
it works.</div>
<div>Then it works ok.</div>
<div><br>
</div>
<div>Questions:</div>
<div>
<ul>
<li>How to force node to stick as possible
with one specific (local) node ?</li>
<li>How to know where a client is currently
connected?</li>
</ul>
<div>Thanks for your help :)</div>
</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br clear="all">
<div>
<div>Cordialement,<br>
Mathieu CHATEAU<br>
<a href="http://www.lotp.fr" target="_blank">http://www.lotp.fr</a></div>
</div>
<br>
<div class="gmail_quote">2015-05-11 7:26 GMT+02:00
Mathieu Chateau <span dir="ltr"><<a href="mailto:mathieu.chateau@lotp.fr" target="_blank">mathieu.chateau@lotp.fr</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hello,
<div><br>
</div>
<div>thanks for helping :)</div>
<div><br>
</div>
<div>If gluster server is rebooted, any way
to make client failback on node after
reboot ?</div>
<div><br>
</div>
<div>How to know which node is using a
client ? I see TCP connection to both
node </div>
<div><br>
</div>
<div>Regards,</div>
</div>
<div class="gmail_extra"><br clear="all">
<div>
<div>Cordialement,<br>
Mathieu CHATEAU<br>
<a href="http://www.lotp.fr" target="_blank">http://www.lotp.fr</a></div>
</div>
<div>
<div> <br>
<div class="gmail_quote">2015-05-11 7:13
GMT+02:00 Ravishankar N <span dir="ltr"><<a href="mailto:ravishankar@redhat.com" target="_blank">ravishankar@redhat.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF"><span> <br>
<br>
<div>On 05/10/2015 08:29 PM,
Mathieu Chateau wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hello,
<div><br>
</div>
<div>Short way: Is there any
way to define a preferred
Gluster server ?<br>
<div><br>
</div>
<div>Long way:</div>
<div>I have the following
setup (version 3.6.3) :</div>
<div><br>
</div>
<div>Gluster A <==>
VPN <==> Gluster B</div>
<div><br>
</div>
<div>Volume is replicated
between A and B.</div>
<div><br>
</div>
<div>They are in same
datacenter, using a
1Gb/s connection, low
latency (0.5ms)</div>
<div><br>
</div>
<div>I have gluster
clients in lan A &
B.</div>
<div><br>
</div>
<div>When doing a "ls" on
big folder (~60k files),
both gluster node are
used, and so it need 9mn
instead on 1mn if only
the local gluster is
reachable.</div>
<div><br>
</div>
</div>
</div>
</blockquote>
<br>
</span> Lookups (and writes of
course) from clients are sent to
both bricks because AFR uses the
result of the lookup to select
which brick to read from if there
is a pending heal etc.<br>
If the file is clean on both A and
B, then reads are always served
from the local brick. i.e. reads
on clients mounted on A will be
served from the brick in A (and
likewise for B).<br>
<br>
Hope that helps,<br>
Ravi<br>
<br>
<br>
<blockquote type="cite"><span>
<div dir="ltr">
<div>
<div>It's HA setup,
application is present
on both side. I would
like a master/master
setup, but using only
local node as possible.</div>
<div><br>
</div>
<div><br clear="all">
<div>
<div>Regards,<br>
Mathieu CHATEAU<br>
<a href="http://www.lotp.fr" target="_blank">http://www.lotp.fr</a></div>
</div>
</div>
</div>
</div>
<br>
<fieldset></fieldset>
<br>
</span>
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