Hello everybody!
First big thanks to this awesome project, we are using today NFS for our Webservice, but we want to use in the future GlusterFS to make it redundant. I'm hating standing up in the night to fix problems ; )
I'm working now with two Servers and one Client. All on Amazon EC2 running Debian Lenny and GlusterFS 3.0.3.
On the Client side there is an Apache 2.2, with PHP and eAccelerator. We need to have every PageHit as fast as possible, so I'm trying to use the performance translators as good as possible.
While playing around with the io-cache I figured out, that on my system it isn't used. So my Configs looks like this:
SERVER
====
volume posix1
type storage/posix
option directory /data/export
end-volume
volume locks1
type features/locks
subvolumes posix1
end-volume
volume server-tcp
type protocol/server
option transport-type tcp
option auth.addr.brick1.allow *
option transport.socket.listen-port 6996
option transport.socket.nodelay on
subvolumes locks1
end-volume
==
CLIENT
======
volume server1
type protocol/client
option transport-type tcp
option remote-host 10.228.23.83
option transport.socket.nodelay on
option transport.remote-port 6996
option remote-subvolume brick1
end-volume
volume server2
type protocol/client
option transport-type tcp
option remote-host 10.228.238.84
option transport.socket.nodelay on
option transport.remote-port 6996
option remote-subvolume brick1
end-volume
volume mirror0
type cluster/replicate
subvolumes server1 server2
end-volume
volume trace
type debug/trace
subvolumes mirror0
end-volume
volume iocache
type performance/io-cache
option cache-size 50MB
option cache-timeout 30
option page-size 256KB
subvolumes trace
end-volume
==
When I now clear the debug file, make a pagerefresh, the debug file contains about:
~4800 Lines
Now I remove the IO-Cache and make the same again:
~4800 Lines
So the same count of files are requested over the network. Even if I request the same files again after 10 secounds, there are 4800 new lines. So no Cache at all.
When I'm now using performance/quick-read it looks like this:
With Quick-Read:
~2500 LInes
Without Quick-Read:
~4800 Lines
So there are some files cached. Does everybody know, why the io-cache does not work? Or is my debugging configuration wrong?
I could use performance/quick-read for our installation, but there is still the Memory-Bug....
Thanks for your help.
Michael
