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Re: [Gluster-devel] Can't get afr to work


From: Daniel van Ham Colchete
Subject: Re: [Gluster-devel] Can't get afr to work
Date: Thu, 8 Mar 2007 11:04:38 -0300

James,

I'm not a Gluster developer but I think I know what the problem is.

To test my hypothesis, try a telnet at 127.0.0.1:6997. If I'm right it won't
work.

The cause of the problem is that the volume name for both servers is the
same and this shouldn't be right. Try changing the second server volume name
from 'server' to 'server2'. It's not necessary to change anything else.

Your gluster mountpoint works because AFR will work even if one of the
servers is down.

Tell-me what you found.

Best regards,
Daniel Colchete

On 3/8/07, James Dyer <address@hidden> wrote:

I've been trying for ages to get afr to work, but somethings either
broken, or I'm just not 'getting it'...

I'm running glusterfs 1.3.0-pre2 on RHEL 4

At the moment, I'm just trying to get two instances of glusterdfsd running
on the same server, with the directories /home/jad/gluster/cfs0 and cfs1
respectively.  If I understand things correctly (and it's quite possible
I'm not understanding properly), the following configuration should mean
that any file I create in the glusterfs directory should appear in both
cfs0 and cfs1, due to the replicate option.

Configuration for first glusterdfs:
volume brick
  type storage/posix
  option directory /home/jad/gluster/cfs0
end-volume

volume server
  type protocol/server
  option transport-type tcp/server
  option bind-address 127.0.0.1
  option listen-port 6996
  subvolumes brick
  option auth.ip.brick.allow *
end-volume

Configuration for second glusterdfs:
volume brick
  type storage/posix
  option directory /home/jad/gluster/cfs1
end-volume

volume server
  type protocol/server
  option transport-type tcp/server
  option bind-address 127.0.0.1
  option listen-port 6997
  subvolumes brick
  option auth.ip.brick.allow *
end-volume

Configuration for glusterfs mounting:
volume brick
  type protocol/client
  option transport-type tcp/client
  option remote-host 127.0.0.1
  option remote-port 6996
  option remote-subvolume brick
end-volume

volume brick-afr
  type protocol/client
  option transport-type tcp/client
  option remote-host 127.0.0.1
  option report-port 6997
  option remote-subvolume brick
end-volume

volume afr
  type cluster/afr
  subvolumes brick brick-afr
  option replicate *:2
end-volume



First instance of glusterdfs run with:
glusterfsd -f /home/jad/gluster/server0.vol

Second instance:
glusterfsd -f /home/jad/gluster/server1.vol

glusterfs mount run with:
glusterfs -f ./client.vol glusterfs



What I'm finding however, is that if I do a 'touch glusterfs/foo.bar', the
file is appearing in cfs0, but not in cfs1, which seems to me means that
gluster is ignoring my 'option replicate *:2' entry in the afr volume.


Any thoughts on what I'm doing wrong???

James



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