Re: [Nagios-devel] host_name and service_description examples
Posted: Mon Jun 13, 2005 6:19 pm
On Mon, 13 Jun 2005, Andreas Ericsson wrote:
> I've made some corrections to the benchmark code, and a couple of cheap
> optimizations. For those who want to test it for themselves (a whopping
> 3 downloads so far
, I suggest you leech the new version from
> http://oss.op5.se/nagios/nagios-hash.tar.gz and give it a shake.
>
> Ethan; If it's allright with you, I'll go ahead and implement Paul
> Hsie's hash. It looks up 1074600 hostname strings in 358msecs with the
> current table-size of 1024 buckets (compared to 987msecs for the
> additive hash currently in use). I'd also suggest wasting some memory
> here. Upping the hash-table size to 16384 buckets (64Kb on 32-bit archs)
> cuts another 40% off the average lookup time while staying fairly
> friendly to the hardware.
Neat. I'm afraid the current brain-dead hash function is from me starting
with something simple, and leaving it when it worked for a few thousand hosts
and services.
Thank you for your effort, I have found your collection of hash functions to
be very educational.
- Dan
This post was automatically imported from historical nagios-devel mailing list archives
Original poster: [email protected]
> I've made some corrections to the benchmark code, and a couple of cheap
> optimizations. For those who want to test it for themselves (a whopping
> 3 downloads so far
, I suggest you leech the new version from> http://oss.op5.se/nagios/nagios-hash.tar.gz and give it a shake.
>
> Ethan; If it's allright with you, I'll go ahead and implement Paul
> Hsie's hash. It looks up 1074600 hostname strings in 358msecs with the
> current table-size of 1024 buckets (compared to 987msecs for the
> additive hash currently in use). I'd also suggest wasting some memory
> here. Upping the hash-table size to 16384 buckets (64Kb on 32-bit archs)
> cuts another 40% off the average lookup time while staying fairly
> friendly to the hardware.
Neat. I'm afraid the current brain-dead hash function is from me starting
with something simple, and leaving it when it worked for a few thousand hosts
and services.
Thank you for your effort, I have found your collection of hash functions to
be very educational.
- Dan
This post was automatically imported from historical nagios-devel mailing list archives
Original poster: [email protected]