[Lustre-discuss] manual OST failover for maintenance work?

[Adeyemi Adesanya]

Hi.

We have pairs of OSS nodes hooked up to shared storage arrays  
containing OSTs but we have not enabled any failover settings yet. Now  
we need to perform maintenance work on an OSS and we would like to  
minimize Lustre downtime. Can I use tunefs.lustre to specify the OSS  
failover NID for an existing OST? I assume i'll have to take the OST  
offline to make this change. Will clients that have Lustre mounted  
pick up this change or will all clients have to remount? I should  
mention that we are running Lustre 1.8.2.

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Yemi