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List:       lustre-discuss
Subject:    [Lustre-discuss] OST failover scripts
From:       cliffw () clusterfs ! com (Cliff White)
Date:       2007-01-23 17:08:22
Message-ID: 45B6A373.6010003 () clusterfs ! com
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belshaw, john wrote:
> I am updating our Lustre config to use Heartbeat for automated failover
> with Lustre 1.4.7.1 and I was checking the operations manual V36 for the
> exact syntax for OST failover and I am not sure if it is correct.
> 
> We wish to use active/active failover where 2 OSS see the same set of
> OSS and are active for half of them and passive for the other half.
> 
> Up to now we have used failover in a manual way so we have config lines
> :
> 
> --add ost --node r909n001 --ost xbb12-1a --failover --lov P-lov --dev
> /dev/sda --size 0 --fstype ext3 --mountfsoptions "mballoc,extents"
> --mkfsoptions '-N 1000000'
> --add ost --node r909n002 --ost xbb12-1a --failover --lov P-lov --dev
> /dev/sda --size 0 --fstype ext3 --mountfsoptions "mballoc,extents"
> --mkfsoptions '-N 1000000'
> 
> For one lun, and we would failover from r909n001 to r909n002 with 
> lconf --node r909n002 --select xbb12-1a=r909n002 /etc/lustre/lustre.xml
> 
> In the manual I see a different command is used with --service and also
> --group is mentioned in the config file on page 61, however on page 62
> --group is not mentioned so I feel something is missing. I could not
> find a clear answer in the KB either. I would like to use the --group
> option to failover all OST's with one command. Could someone clarify the
> syntax for OSS failover?

--service=<ost-name> is the current method. --group and --select are 
depreciated. Since you must specify by --service there is no way to fail
all OSTs over as a set. (--group didn't work that way either, it only 
grouped failover pairs.)

cliffw
> 
> 
> John Belshaw
> 
> IT technical Architect
> IT Operations - EAME Computing Hub
> CGGVeritas
> 
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> Lustre-discuss@clusterfs.com
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> 

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