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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