[evla-sw-discuss] Lustre work on Wednesday

[Bryan Butler]

have we done an actual timing test to verify? (just curious.)


James Robnett wrote, On 9/17/14 11:12 :
>
> This is all done now.
>
> The CBE nodes are using the new o2ib1 named network.  I restarted telcal
> on the mctest and mchammer (all that's been the case since 10:30).
>
> The AOC NGAS servers are again mounting both the AOC and VLA filesystems
> so ingestion and downloads should be continued.
>
> In addition those AOC NGAS archive servers equipped with Infiniband
> interfaces (9 through 20) mount and communicate with the AOC lustre
> filesystem over IB rather than reverting to ethernet.  This behavior is
> what triggered the name change the VLA.
>
> If you see any problems please let me know.
>
> James
>
> On 09/15/2014 03:18 PM, James Robnett wrote:
>>
>> This Wednesday I need to make a change to the Lustre network name for
>> the Infiniband(IB) network from o2ib0 to o2ib1.  Currently both the AOC
>> and VLA IB networks are named o2ib0 which is confusing the NGAS nodes
>> which mount both Lustres but only the AOC one over IB.
>>
>> I'll need roughly an hour, either 9am to 10am or 10am to 11am(1).  If
>> nobody has a preference I'll probably do it from 10 to 10am.
>>
>> During the work the CBE nodes will need to be down, telcal will need to
>> be stopped on mchammer and mctest (so I can umount lustre) and ingestion
>> will need to be disabled on the NGAS node (again so I can umount lustre).
>>
>> Once I've made the changes I'll see that the CBE nodes, mchammer and
>> mctest are working as expected.  Then I'll likely need to reboot the
>> NGAS nodes to change how they mount lustre.
>>
>> John do we need to put a notice on the archive page saying it will be
>> unavailable ?  Should only be down long enough to reboot.
>>
>> James
>> 1) If it needs to be some other time just let me know.
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