[lustre-discuss] How to activate an OST on a client ?

[Cameron Harr]

There's also an "lctl --device <dev> activate" that I've used in the 
past though I don't know what conditions need to be for it to work.

On 8/27/24 07:46, Andreas Dilger via lustre-discuss wrote:
> Hi Jan,
> There is "lctl --device XXXX recover" that will trigger a reconnect to 
> the named OST device (per "lctl dl" output), but not sure if that will 
> help.
>
>
> Cheers, Andreas
>
>> On Aug 22, 2024, at 06:36, Haarst, Jan van via lustre-discuss 
>> <lustre-discuss at lists.lustre.org> wrote:
>>
>> 
>>
>> Hi,
>>
>> Probably the wording of the subject doesn’t actually cover the issue, 
>> what we see is this :
>>
>> We have a client behind a router (linking tcp to Omnipath) that shows 
>> an inactive OST (all on 2.15.5).
>>
>> Other clients that go through the router do not have this issue.
>>
>> One client had the same issue, although it showed a different OST as 
>> inactive.
>>
>> After a reboot, all was well again on that machine.
>>
>> The clients can lctl ping the OSSs.
>>
>> So although we have a workaround (reboot the client), it would be 
>> nice to:
>>
>>  1. Fix the issue without a reboot
>>  2. Fix the underlying issue.
>>
>> It might be unrelated, but we also see another routing issue every 
>> now and then:
>>
>> The router stops routing request toward a certain OSS, and this can 
>> be fixed by deleting the peer_nid of the OSS from the router.
>>
>> I am probably missing informative logs, but I’m more than happy to 
>> try to generate them, if somebody has a pointer to how.
>>
>> We are a bit stumped right now.
>>
>> With kind regards,
>>
>> -- 
>>
>> Jan van Haarst
>>
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