Re: Number of persistent connection

Hello Alex,

Thanks for your quick reply .One more question Alex

In polygraph, will a persistent connection be used for particular domain or
will it use the same connection for more than one domain.

Thanks,
Jag.

On 10/12/06, Alex Rousskov <rousskov@measurement-factory.com> wrote:
>
> On Thu, 2006-10-12 at 19:11 +0530, Jegadeesh wrote:
>
> > If system has high configuration (P IV, 3.80GHz CPU, 1GB RAM), How
> > many persistent connection can be generated by this PolyClient?
>
> The number of concurrent persistent connection your system can support
> depends on what those connections are being used for. If most persistent
> connections are idle, Polygraph may be able to support 20,000 or more of
> them. If you are assuming PolyMix-like workload with a caching proxy,
> then the peak number of concurrent connections on the client side will
> probably be in the 5,000 ballpark, with peak load about 2,000 requests
> per second.
>
> These are ballpark guesstimates. I have not tried to measure peak
> performance on a high-end box recently. Perhaps somebody on the list can
> post more accurate and fresh estimates.
>
> Achieving these results would require tuning your operating system and
> Polygraph workload. You will also need multiple 100Mbit NICs or a Gbit
> NIC.
>
> Finally, if you need significantly higher performance than can be
> achieved today, I believe certain optimizations like using kqueue(2)
> instead of poll(2) on FreeBSD will help. These optimizations would
> require serious development efforts though.
>
> HTH,
>
> Alex.
>
>
>
Received on Thu Oct 12 11:38:25 2006