SUMMARY: fcp:fcp_offline_delay

Thanks to everyone who found time to answer

Nelyubin Anatoly
hike
Antony Pavlenko
Sengor

We use MPxIO and the best /etc/system settings (recommended by EMC support
matrix) for us are:

forceload: drv/ssd
set ssd:ssd_max_throttle=20
set ssd:ssd_io_time=0x78
set maxphys=1048576
set fcp:fcp_offline_delay = 20

regards,

Aleks F.

On 14/01/09 09:48 +0200, Aleks Feltin wrote:
>Hi Managers,
>
>I am on Solaris 10 connected to Symmetrix SAN.
>What happened recently was a SAN firmware upgrade, which caused small delay
>(5-10 seconds).
>As a result, qlc HBAs were offlined and all LUNs have been lost hence the
>mounts were gone.
>With forceLIP it succeeded to get them back without rebooting.
>
>My major concern is how to avoid such situations in future.
>How to force Solaris not to offline HBAs for let's say 20-30 seconds and
keep
>filesystem mounted during short maintenances?
>
>Very first thing I came up to was fcp_offline_delay parameter. It is set to
20
>seconds by default, but it is clear enough that downtime took significantly
>less time. I puzzled what should I tune to achieve my major objective.
>
>thanks in advance,
>
>--
>A
>
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A

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