[Lustre-discuss] Enabling mds failover after filesystem creation

2011-06-14 Thread Jeff Johnson
Greetings, I am attempting to add mds failover operation to an existing v1.8.4 filesystem. I have heartbeat/stonith configured on the mds nodes. What is unclear is what to change in the lustre parameters. I have read over the 1.8.x and 2.0 manuals and they are unclear as exactly how to enable

Re: [Lustre-discuss] Enabling mds failover after filesystem creation

2011-06-14 Thread Cliff White
It depends - are you using a combined MGS/MDS? If so, you will have to update the mgsnid on all servers to reflect the failover node, plus change the client mount string to show the failover node. otherwise, it's the same procedure as with an OST. cliffw On Tue, Jun 14, 2011 at 12:06 PM, Jeff

Re: [Lustre-discuss] Enabling mds failover after filesystem creation

2011-06-14 Thread Jeff Johnson
Apologies, I should have been more descriptive. I am running a dedicated MGS node and MGT device. The MDT is a standalone RAID-10 shared via SAS between two nodes, one being the current MDS and the second being the planned secondary MDS. Heartbeat and stonith w/ ipmi control is currently

Re: [Lustre-discuss] Enabling mds failover after filesystem creation

2011-06-14 Thread Cliff White
Then it should be the same as the OST case. The only difference between the two is that we never allow two active MDSs on the same filesystem, so MDT is always active/passive. cliffw On Tue, Jun 14, 2011 at 12:18 PM, Jeff Johnson jeff.john...@aeoncomputing.com wrote: Apologies, I should have