Gluster users - Oct 2012 - self-heal impact on performance

Hello all

I'm testing glusterfs  3.3.0-1 on a couple of CentOS   6.3  servers,
than run KVM

after inserting a new empty brick due to a simulated failure, the
Self-healing process kicked in, as expected

after that however the VMs became mostly unsuable due to IO delay

it looks like the  Self-healing process doesn't let anything else run
normally

I believe glusterfs  3.3 has some improvments to avoid this problem

is there some performe tunning that has to be done?

is there some specific command to start a special self-healing process
for systems that have large files (lke virtualization systems)?

thanks, best regards,
Jo?o

PS: this probably isn't a new problem: I've picked up the email
subject from a message dating Mar 24   2011

Joao, Gluster is not yet good to run Virtual Machines yet. That's a
statement from RedHat sales. So although it works you will find issues like
this.

Fernando

-----Original Message-----
From: gluster-users-bounces at gluster.org [mailto:gluster-users-bounces at
gluster.org] On Behalf Of Jo?o Pagaime
Sent: 03 October 2012 17:40
To: Gluster-users at gluster.org
Subject: [Gluster-users] self-heal impact on performance

Hello all

I'm testing glusterfs  3.3.0-1 on a couple of CentOS   6.3  servers,
than run KVM

after inserting a new empty brick due to a simulated failure, the Self-healing
process kicked in, as expected

after that however the VMs became mostly unsuable due to IO delay

it looks like the  Self-healing process doesn't let anything else run
normally

I believe glusterfs  3.3 has some improvments to avoid this problem

is there some performe tunning that has to be done?

is there some specific command to start a special self-healing process for
systems that have large files (lke virtualization systems)?

thanks, best regards,
Jo?o

PS: this probably isn't a new problem: I've picked up the email
subject from a message dating Mar 24   2011
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