[Lustre-discuss] Lustre on ZFS MDS/MDT failover

2014-12-01 Thread Ron Croonenberg
Hello, We're running/building Lustre on ZFS and I noticed that when using mkfs.lustre on a zpool, when creating the MDT, with two --mgsnid parameters, one for the MGS and one for the MGS fail over, causes a problem resulting in not being able to mount the MDT. (I think it tries to connect to

Re: [Lustre-discuss] [EXTERNAL] Lustre on ZFS MDS/MDT failover

2014-12-01 Thread Mervini, Joseph A
I just ran into this same issue last week. There is a JIRA ticket on it at Intel but in a nutshell mkfs.lustre on zfs will only record the last mgsnode you specify in your command. To add an additional fail node you can use the zfs command to update the configuration: zfs set

Re: [Lustre-discuss] [EXTERNAL] Lustre on ZFS MDS/MDT failover

2014-12-01 Thread Mervini, Joseph A
Oh - BTW. You will need to do the same thing with your OSTs for setting both the mgsnodes. Also, you can use zfs show zpool name/zpool volume to get the same info as you would with tunefs.lustre Joe Mervini Sandia National Laboratories High Performance Computing 505.844.6770