Re: [hobbit] iostat

[Stef Coene <stef.coene (at) docum.org>]

On Friday 07 November 2008, Martin Flemming wrote:
> Great Stuff, Stef !
>
> ... three more questions,
>
> a) is it possible to declare some excludes
> or something for only active-disks ?
>
> e.g. md0 , the most of my machines have not software-mirror
>             but some .....
>
> or
>
> /dev/hdd or /dev/cdrom .. in my graph's
> it appears as hdd but that's the cdrom and it's empty ....
Of course, the script was more a proof of concept.  I had the iostat numbers 
on aix, so it was not that hard to change it for linux.
I will update the script and add such feature.

> b)
>
> I've got three empty links in the trend=page
> to iostat-disk, how could i delete them or is there a
> association with a) ?
Euh, can you upload the graph somewhere so I can see it ?

> c)
>
> I've got negative KB/s on some y-axis ... hmm, why ?
Writes are negative, reads are positive.  This is defined in the hobbit-graph.  
The numbers in the rrd file are fine.

I just saw in my script and it also collects the statistics in blocks per 
second.  And by combining the blocks and bytes / second you can get the block 
size.  I can add such graph definitions if anyone is interested....

Maybe I can write a howto based on this script...  so anyonce can create a 
graph from a number.


Stef