Nagios 1.2 fast IO-patch

[BOLLENGIER Eric]

Hi,

This patch try to emulate the mmap system call.

Where can i find this patch ? I'll try to rewrite it to use
mmap instead of reading the whole file in memory... 

I think, it's a bad idea to integrate it... let linux do his job.

Regards

Eric

On Fri, 2004-05-21 at 02:27, Ethan Galstad wrote:

> This patch is a bit old, but I've just gotten around to testing it on 
> the 2.0 code.  From what I can tell, there's no measureable 
> difference with or without the patch.  I tested three different 
> reporting ranges ("today", "this year", and "last year") on two 
> separate boxes.  Both boxes are RedHat 7.2 running kernel-2.4.20-
> 20.7.
> 
> One box is a PII 400 w/ 220 MB RAM, an 8 GB SCSI drive and 45 hosts 
> in the report.  The other is a PII 300 w/ ~200 MB RAM, an 8 GB SCSI 
> drive and 15 hosts in the report.
> 
> Report generation times were within 5% of each other on both machines 
> when tested w/ and w/o the patch (sometimes the patches version was 
> actually slightly slower than the nonpatched code).  Average report 
> times for "today", "this year" and "last year" are approx: 1.25 sec, 
> 6.2 sec, and 7.7 sec.
> 
> Perhaps the SCSI drives are doing a better job at predictive reads 
> than the IDE drives you tested.  Not sure.  Or perhaps its something 
> else.  For the record, I have not tested this against 1.2, but I 
> wouldn't think the results would be much different.  Anyone else 
> tried this patch out?  If so, what were your findings?

-- 
Eric BOLLENGIER, Administrateur Système - Poste 1325
SIGMA Informatique http://www.sigma.fr
3 rue Newton, BP 4127, 44241 La Chapelle sur Erdre Cedex
tel : 02.40.37.14.00
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