[hobbit] Optimizing Xymon disk performance

[Olivier AUDRY]

hi

> You could probably get away with just copying the hobbitd/hobbitd_rrd 
> and web/hobbitsvc.cgi binaries from this version on top of your current
> setup, but I cannot say for certain that it will work.

you have to update hobbitgraph.cgi too. It's seems to work fine.

148795 rrd files
8000 devices
ha with drbd

load 7 without this hack. 1.47 now
i/o wait 50% ithout this hack. 0% now

Henrik you rox !

oau

----- Mail Original -----
De: "Henrik \"Størner\"" <henrik at hswn.dk>
À: hobbit at hswn.dk
Envoyé: Mercredi 4 Novembre 2009 11h21:51 GMT +01:00 Amsterdam / Berlin / Berne / Rome / Stockholm / Vienne
Objet: Re: [hobbit] Optimizing Xymon disk performance

In <4AF006C5.1000907 at shihad.org> Iain M Conochie <iain at shihad.org> writes:

>Henrik St�rner wrote:
>> <snip>
>>
>> The standard 4.3.0 beta adds caching of RRD file updates, and this has a
>> significant impact on the I/O load of the server - essentially, it means
>> that hobbitd_rrd caches up to 12 updates (= 1 hour) before it does an
>> actual update of the RRD file. Since the amount of disk I/O is almost
>> identical whether you're doing one data update or 50, this caching
>> eliminates about 90% of your disk I/O on the RRD files. So that would be 
>> the simplest solution to implement.
>>   

>I am running 4.3.0-0.20080103 so quite an out of date version. However I 
>would be interested in learning this. Would I have to upgrade my hobbit 
>/ xymon installation to get this feature? What version contains it? How 
>do I enable it?

I would really recommend upgrading to the current software in the
Subversion tree
http://hobbitmon.svn.sourceforge.net/viewvc/hobbitmon/branches/4.3.0/
and just install that.


You could probably get away with just copying the hobbitd/hobbitd_rrd 
and web/hobbitsvc.cgi binaries from this version on top of your current
setup, but I cannot say for certain that it will work.



Regards,
Henrik


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