[lustre-discuss] Slow mount on clients

[Åke Sandgren]

Which then of course means that if the MDS HA has done a failover it
will be slow to mount until it's back in its usual place...

Used to happen to us very often when the server side was somewhat unstable.

On 2/4/20 8:55 AM, Moreno Diego (ID SIS) wrote:
> Not sure if it's your case but the order of MGS' NIDs when mounting matters:
> 
> [root at my-ms-01xx-yy ~]# time mount -t lustre 10.210.1.101 at tcp:10.210.1.102 at tcp:/fs2 /scratch
> 
> real    0m0.215s
> user    0m0.007s
> sys     0m0.059s
> 
> [root at my-ms-01xx-yy ~]# time mount -t lustre 10.210.1.102 at tcp:10.210.1.101 at tcp:/fs2 /scratch
> 
> real    0m25.196s
> user    0m0.009s
> sys     0m0.033s
> 
> Since the MGS is running on the node having the IP "10.210.1.101", if we first try with the other one there seems to be a timeout of 25s.
> 
> Diego
>  
> 
> On 03.02.20, 23:17, "lustre-discuss on behalf of Andrew Elwell" <lustre-discuss-bounces at lists.lustre.org on behalf of andrew.elwell at gmail.com> wrote:
> 
>     Hi Folks,
>     
>     One of our (recently built) 2.10.x filesystems is slow to mount on
>     clients (~20 seconds) whereas the others are nigh on instantaneous.
>     
>     We saw this before with a 2.7 filesystem that went away after doing
>     <something unknown / filesystem upgrade> but we've no idea what.
>     
>     Nothing obvious in the logs.
>     
>     Does anyone have suggestions for what causes this, and how to make it
>     faster? It's annoying me as "something" isn't right but I can't
>     identify what.
>     
>     
>     Many thanks
>     
>     Andrew
>     _______________________________________________
>     lustre-discuss mailing list
>     lustre-discuss at lists.lustre.org
>     http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>     
> 
> _______________________________________________
> lustre-discuss mailing list
> lustre-discuss at lists.lustre.org
> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
> 

-- 
Ake Sandgren, HPC2N, Umea University, S-90187 Umea, Sweden
Internet: ake at hpc2n.umu.se   Phone: +46 90 7866134 Fax: +46 90-580 14
Mobile: +46 70 7716134 WWW: http://www.hpc2n.umu.se