Re: [Lustre-discuss] About MDS failover

2009-01-17 Thread Andreas Dilger
On Jan 15, 2009 17:51 -0800, Jeffrey Alan Bennett wrote: > > You can use HBA multi-pathing to avoid this problem, if your > > hardware supports it. You can also use > > /proc/fs/lustre/health_check to check if the filesystems have > > encountered errors and are marked "unhealthy". > > We use

Re: [Lustre-discuss] About MDS failover

2009-01-15 Thread Jeffrey Alan Bennett
Thanks Andreas, I understand that this is a common issue with failover, as mentioned in the Lustre documentation. > > You can use HBA multi-pathing to avoid this problem, if your > hardware supports it. You can also use > /proc/fs/lustre/health_check to check if the filesystems have > encou

Re: [Lustre-discuss] About MDS failover

2009-01-15 Thread Andreas Dilger
On Jan 15, 2009 11:38 -0800, Jeffrey Alan Bennett wrote: > I am using heartbeat V2. It works as expected, I just had to tune some > time outs, but it still takes around 3 minutes to totally move the MGS/MDS > services to the other system. This is largely an issue of the Lustre failover itself, an

Re: [Lustre-discuss] About MDS failover

2009-01-15 Thread Jeffrey Alan Bennett
Hi Cliff, > > Are you using heartbeat V1 or V2? > I am using heartbeat V2. It works as expected, I just had to tune some time outs, but it still takes around 3 minutes to totally move the MGS/MDS services to the other system. I guess having the MGS and MDS on separate systems would help reduc

Re: [Lustre-discuss] About MDS failover

2009-01-15 Thread Cliff White
Jeffrey Alan Bennett wrote: > Hi, > > What software are people using for MDS failover? > > I have been using Heartbeat from Linux-HA but I am not absolutely happy with > its performance. > > Is there anything better out there? Are you using heartbeat V1 or V2? I would like to hear more about

Re: [Lustre-discuss] About MDS failover

2009-01-14 Thread Wojciech Turek
I like HA-linux, however if you are looking for alternatives have a look at RedHat Cluster Suite http://www.redhat.com/docs/manuals/csgfs/browse/rh-cs-en/ Jeffrey Alan Bennett wrote: > Hi, > > What software are people using for MDS failover? > > I have been using Heartbeat from Linux-HA but I am

[Lustre-discuss] About MDS failover

2009-01-14 Thread Jeffrey Alan Bennett
Hi, What software are people using for MDS failover? I have been using Heartbeat from Linux-HA but I am not absolutely happy with its performance. Is there anything better out there? Thanks, Jeffrey Bennett HPC Data Engineer San Diego Supercomputer Center 858.822.0936 http://users.sdsc.edu/~