Why you don't use qdisk on multipath, than can resolv your problem 2012/2/10 Jan Huijsmans <jan.huijsm...@interaccess.nl>
> Hello, > > In the clusters we have we use a qdisk to determine which node had the > quorum, in case of a split brain situation. > > This is working great... until the qdisk itself is hit due to problems > with the SAN. Is there a way to have a stable cluster, > with qdisks, where the absence of (1) qdisk won't kill the cluster all > together. At this moment, with the setup with 1 qdisk, > the cluster is totally depending on the availability of the qdisk, while, > IMHO, it should be expendable. > > We have now a triangle setup, with 2 data centers and 1 extra 'quorum' > location for the IBM SAN. In the SAN setup there > are 3 quorum devices, 1 in each data center and the 3rd on the quorum > location. When 1 location fails (one of the data > centers or the quorum location) it is still up and running. > > Is it possible to copy this setup and use 3 qdisks, so when 1 qdisk fails > the cluster stays alive? I would set the vote > value of all components (systems and qdisks) to 1, so the cluster would > keep running with 2 systems and 1 qdisk > or 1 system with 2 qdisks. (it'll be dead with only 3 qdisks, as the > software will die with both systems ;) ) > > I've heard of setup's with 3 systems, where the 3rd was just for the > quorum, so you this one can die, but on this > occasion it won't help us, as there are no systems on the 3rd location. > (and it's not supported by Red Hat, when I'm > correctly informed) > > With regards, > Inter Access BV > > ing. J.C.M. (Jan) Huijsmans > Designer / Technical Consultant UNIX & Linux > Infrastructure Professional Services UNIX > > E-mail: jan.huijsm...@interaccess.nl > > Tel: 035 688 8266 > Mob.: 06 4938 8145 > > Hoofdkantoor: > Colosseum 9, 1213 NN Hilversum > Postbus 840, 1200 AV Hilversum > K.v.K. Hilversum 32032877 > > -- > Linux-cluster mailing list > Linux-cluster@redhat.com > https://www.redhat.com/mailman/listinfo/linux-cluster > -- esta es mi vida e me la vivo hasta que dios quiera
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