From mboxrd@z Thu Jan 1 00:00:00 1970 From: seth vidal Subject: Re: failover speed Date: Tue, 29 Aug 2006 12:57:12 -0400 Message-ID: <1156870632.29242.80.camel@cutter> References: <1156791189.26413.8.camel@cutter> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1156791189.26413.8.camel@cutter> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: device-mapper development List-Id: dm-devel.ids On Mon, 2006-08-28 at 14:53 -0400, seth vidal wrote: > Hi, > I've gotten failover and failback working, however, I'm not sure if the > amount of wait time for the failover is reasonable. I'm using QLogic > 2340 cards and an EVA8000. I'm curious if anyone else using something > similar is seeing in terms of failover times. > > When things are running as I'd expect I'm seeing just a few seconds > before the new path is up. When things seem wrong it's waiting and > queueing for as much as 1.5 minutes. > Okay - I read #8 on the faq in the wiki which told me to look for \*tmo \* files in /sys/ The problem is I'm running a 2.6.9 kernel for rhel4/centos4 and it doesn't have those, yet. I did, however, find these: /sys/class/fc_transport/target1:0:0/device/1:0:0:*/timeout which are set to 30s each. Are these the functional equivalent of each other? Or if I set the above down to say 6s or 3s will I encounter other types of suffering? Thanks, -sv