[Bi-users] Done - Emergency service on Accumulus filesystems

[Fredrik Nyström]

Dear Accumulus storage Users,

mds[8-11,15] has now also been downgraded from Lustre 2.12.7 to 2.12.6.

Downtime was between 15:03:56 and 15:12:28 CEST.


Kind Regards / Fredrik Nyström, NSC

On 2021-10-25 13:29, Fredrik Nyström wrote:
> Dear Accumulus storage Users,
> 
> the software updates we applied on Thursday last week we have seen 
> cases of clients being wrongfully evicted by Lustre medatada servers.
> 
> On friday ~16:00 CEST we downgraded mds14 and mds16 and have not seen 
> any problem since for the following filesystems:
> 
>   /nobackup/rossby24
>   /nobackup/smhid17
>   /nobackup/rcdl
>   /nobackup/bolinc1
>   /nobackup/rossby26
>   /nobackup/smhid19
> 
> 
> We will soon update mds[8-11,15] during which time accesses to 
> filesystems (except those mentioned above) will hang (but not fail, if 
> it goes according to plan) for 5-10 minutes.
> 
> 
> Downgrading is a temporary fix, we are still working on a permanent 
> solution.
> 
> 
> Kind Regards,
> 

-- 
Fredrik Nyström, National Supercomputer Centre
freny at nsc.liu.se