[Lustre-discuss] lustre dstat plugin

[Brock Palen]

On Mar 7, 2008, at 6:58 PM, Kilian CAVALOTTI wrote:

> Hi Brock,
>
> On Wednesday 05 March 2008 05:21:51 pm Brock Palen wrote:
>> I have wrote a lustre dstat plugin.  You can find it on my blog:
>
> That's cool! Very useful for my daily work, thanks!

Thanks!  Its the first python I ever wrote.

>
>> It only works on clients, and has not been tested on multiple mounts,
>> Its very simple just reads /proc/
>
> It indeed doesn't read stats for multiple mounts. I slightly  
> modified it
> so it can display read/write numbers for all the mounts it founds (see
> the attached patch).

This is great idea

>
> Here's a typical output for a rsync transfer from scrath to home:
>
> -- 8< ---------------------------------------------------------------
> $ dstat -M lustre
>
> Module dstat_lustre is still experimental.
> --scratch-------home---
>  read write: read write
>  110M    0 :   0   110M
>  183M    0 :   0   183M
>  184M    0 :   0   184M
> -- 8< ---------------------------------------------------------------
>
> Maybe it could be useful to also add the other metrics from the stat
> file, but I'm not sure which ones would be the more relevant. And it
> would probably be wise to do that in a separate module, like
> lustre_stats, to avoid clutter.

Yes,  dstat comes with plugins for nfsv3  and has two modules,

dstat_nfs3  and dstat_nfs3op  which has extended details.  So I think  
this would be a good idea to follow that model.

>
> Anyway, great job, and thanks for sharing it!

Thanks again.

> Cheers,
> -- 
> Kilian<dstat_lustre.diff>