Virtual IP will not work at all. We've tried it, though not for failover. Lustre basically implements/handles it's own networking, remember.
Tina Jagga Soorma wrote: > How would the OSS's and client's communicate with the MDS server in a > failover situation? > > This is how I am doing things: > > mds01: mkfs.lustre --fsname=fsname --mdt --mgs /dev/vgname/lvname > > oss01: mkfs.lustre --ost --fsname=fsname --failnode=os...@o2ib3 > --mgsnode=md...@o2ib3 /dev/mapper/mpath0 > oss02: mkfs.lustre --ost --fsname=fsname --failnode=os...@o2ib3 > --mgsnode=md...@o2ib3 /dev/mapper/mpath0 > > client01: mount -t lustre mds01...@o2ib3:/fsname /mnt > > Now, if mds01 fails over to mds02, how would the client communicate with > the new MDS server if the IP changes? > > What would the mkfs.lustre commands look like for a HA setup for MDS & > OSS. > > Also, is there a downfall for using a virtual IP for the MDS's? > > Thanks in advance for your assistance. > -J > > > > On Tue, Jan 19, 2010 at 2:43 AM, Andreas Dilger <[email protected] > <mailto:[email protected]>> wrote: > > On 2010-01-19, at 13:01, Jagga Soorma wrote: > > I am working on clustering our MDS & OSS servers and wanted to > make sure I understand this correctly. Can you please let me > know if this sounds right: > > a) Planning on having a floating virtual IP setup on the active > MDS server (ib1:1). This is what the OSS's will use when doing > their mkfs. In an outage this virtual IP address will migrate > to the standby node. > > > This is not how Lustre failover works. You need to assign a > separate IP address for each MDS server. Lustre handles multiple > MDS failover nodes itself. > > > b) On the oss's there is no need for a virtual IP that would > need to fail over in an outage. I would simply have heartbeat > mount the filesystems on the other OSS node. > > > > Cheers, Andreas > -- > Andreas Dilger > Sr. Staff Engineer, Lustre Group > Sun Microsystems of Canada, Inc. > > > > ------------------------------------------------------------------------ > > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss -- Tina Friedrich, Computer Systems Administrator, Diamond Light Source Ltd Diamond House, Harwell Science and Innovation Campus - 01235 77 8442 _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
