> If you want a highly-available 2-node cluster then Lustre probably isn't > what you want. If either node fails it is considered a "double failure" > from the Lustre POV (both MDS, OST, client failing at once) and recovery > from this will not work.
I'm not wanting a HA 2 node cluster, I'm actually wanting a HA 4 node cluster. DRBD by itself works quite nicely as a 2 node cluster but it doesn't support 4way only 2way. That's the reason I was asking what the minimum lustre cluster size was. The docs mentioned that people are using a 4node cluster in production. What configuration would you use for a 4 node cluster? Thanks, Jon. > On Jun 21, 2007 22:26 -0500, Jon Gabrielson wrote: >> What is the minimal high available lustre installation. >> >> Is a two node lustre installation considered stable? >> i.e. >> node1: MGS+MDT+MDS+DRBD(for MDT/MGS)+OST+OSS+client >> node2: MGS+MDT+MDS+DRBD(for MDT/MGS)+OST+OSS+client >> >> If you add a third/fourth node, I would assume it would be just: >> node3: OST+OSS+client >> node4: OST+OSS+client >> >> Is there any reason why this wouldn't work for a high available cluster? >> Is there a better way to configure a small cluster? > > If you want a highly-available 2-node cluster then Lustre probably isn't > what you want. If either node fails it is considered a "double failure" > from the Lustre POV (both MDS, OST, client failing at once) and recovery > from this will not work. > > Cheers, Andreas > -- > Andreas Dilger > Principal Software Engineer > Cluster File Systems, Inc. > _______________________________________________ Lustre-discuss mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-discuss
