From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Reinecke Subject: Re: multipath-tools with STK FLEXLINE 380 Date: Wed, 22 Nov 2006 16:29:16 +0100 Message-ID: <45646CCC.3070601@suse.de> References: <1164132148.2066.19.camel@localhost.localdomain> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <1164132148.2066.19.camel@localhost.localdomain> 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 Cc: tony.lapointe@connexim.ca, daniel.milani@connexim.ca List-Id: dm-devel.ids Tony Lapointe wrote: > Do not use 'rr_weight=3Dpriorities'. The priorities > handling is currently buggered; or, put it the other wa= y > round, you will need at least my latest fix to get it > working. Just remove that line and stay with the > defaults. That should work. > =20 > And as a sidenote: Using 'group_by_prio' and > 'rr_weight=3Dpriorities' is completely pointless, even = if > 'rr_weight=3Dpriorities' should be working.'group_by_pr= io' > will lump all devices with the same priority into one > group. And 'rr_weight=3Dpriorities' will then modify th= e > 'minio' based on the priority. So you can as well > directly modify the 'minio' > parameter.'rr_weight=3Dpriorities' only makes sense if = you > have path with different priorities in one group, ie > when using 'multibus' or 'group_by_serial'. > Cheers, > =20 > Hannes > -- > Dr. Hannes Reinecke hare suse de > SuSE Linux Products GmbH S390 & zSeries > Maxfeldstra=DFe 5 +49 911 74053 688 > 90409 N=FCrnberg http://www.suse.de >=20 >=20 >=20 >=20 > Hi Hannes, >=20 > thanks for the reply. >=20 > I've tried without "rr_weight=3Dpriorities" in my multipath.conf but i= t does > not work either. > The only difference it makes is that "multipath -v3" now output :=20 > "rr_weight =3D 1 (internal default)" > instead of "rr_weight =3D 2 (config file default)". >=20 > I was thinking that "group_by_prio" is use to group together devices wi= th > differents priorities, with the one with the highest priority first,=20 is it wrong? >=20 Yes. It groups devices with _identical_ priorities together. > The output of "multipath -d -v2" seems to reflect this : >=20 [ .. ] The output is correct. You have two paths to each disk, and each path=20 has a different priority. So the multipath topology is correct. Cheers, Hannes --=20 Dr. Hannes Reinecke hare@suse.de SuSE Linux Products GmbH S390 & zSeries Maxfeldstra=DFe 5 +49 911 74053 688 90409 N=FCrnberg http://www.suse.de