[Gluster-devel] option read-subvolume

[Josh Bowers]

I am trying to setup AFR across two nodes with the clients on the same boxes as the 
servers. Currently, I am using "AFR single process" to do this and everything seems 
to work.

However, I think I'm missing something because the performance seems to be poor.

I was under the impression that "option read-subvolume" option would read from the 
local filesystem if the "type storage/posix" was specified for the subvolume. It 
seems to have no affect whether or not this option is used.


# glusterfs -V
glusterfs 1.3.9 built on May 28 2008 11:01:17
Repository revision: glusterfs--mainline--2.5--patch-770

# uname -a
Linux webnode1 2.6.24-gentoo-r7 #1 SMP Tue May 6 12:38:44 EDT 2008 x86_64 Intel(R) 
Xeon(R) CPU X3210 @ 2.13GHz GenuineIntel GNU/Linux




#### NODE 1 ####
volume client1
       type storage/posix
       option directory /data/gluster/acalog/
end-volume

volume client2
       type protocol/client
       option transport-type tcp/client
       option remote-host 10.42.0.31
       option remote-subvolume client2
       option transport-timeout 10
end-volume

volume webroot
       type cluster/afr
       option read-subvolume client1
       subvolumes client1 client2
end-volume


volume ioc
   type performance/io-cache
   option cache-size 64MB
   option page-size 1MB
   option force-revalidate-timeout 30
   subvolumes webroot
end-volume


volume server
       type protocol/server
       option transport-type tcp/server
       option client-volume-filename /etc/glusterfs/glusterfs-client.vol
       subvolumes  webroot client1
       option auth.ip.webroot.allow *
       option auth.ip.client1.allow *
end-volume


#### NODE 2 ####

volume client1
       type protocol/client
       option transport-type tcp/client
       option remote-host 10.42.0.30
       option remote-subvolume client1
       option transport-timeout 10
end-volume

volume client2
       type storage/posix
       option directory /data/gluster/acalog/
end-volume


volume webroot
       type cluster/afr
       option read-subvolume client2
       subvolumes client1 client2
end-volume


volume ioc
   type performance/io-cache
   option cache-size 64MB
   option page-size 1MB
   option force-revalidate-timeout 30
   option force-atime-update off
   subvolumes webroot
end-volume




volume server
       type protocol/server
       option transport-type tcp/server
       option client-volume-filename /etc/glusterfs/glusterfs-client.vol
       subvolumes  webroot client2
       option auth.ip.webroot.allow *
       option auth.ip.client2.allow *
end-volume





-- 
Josh Bowers
System Administrator - Digital Architecture
http://www.digarc.com/