On 13/03/2012, at 12:07 AM, guest01 wrote: > Hi, > > We are using Squid as forward-proxy for about 10-20k clients with > about 1200RPS. <snip> > > IMHO, it is really important which features you are planning to use. > For example, we are using authentication (kerberos, ntlm, ldap) and > ICAP content adaption. Without that, our RPS-rate would be much > higher. Because of a lacking SMP-support in 3.1, we are using 4 > instances per server. At the beginning, the setup used to be much > simpler! ;-) > Also, understanding your traffic throughput (mbps) and cache-hit ratio and not just request/second is a big factor in scoping required hardware. When benchmarking with Web Polygraph, you can see the difference throughput and cache-hit has on overall server performance. As an example, one particular server I benchmarked in a forward proxy configuration performed as follows: 1200 requests-per-second @ ~350mbps or 2700 requests-per-second @ ~200mbps That was with Polygraph configured to achieve around 15% byte hit ratio. Changing the byte hit ratio of the test up to around 40% resulted in a huge increase in request rate throughput due to a lot more content being satisfied from the high-speed disk array. A 40% byte hit wasn't realistic for the traffic pattern the server was going to see so was an unrealistic test result. Who knows what the results would have looked like if I added auth, a few ACL's different refresh patterns etc. I think it is very difficult for anyone to answer (other than a guide) whether using hardware component X will achieve a result of Y unless they're using the exact same hardware (not just 1 component), have the same configuration and same traffic patterns. > hth, > Peter > > On Mon, Mar 12, 2012 at 1:47 PM, David B. <haazeloud@xxxxxxxxx> wrote: >> Hi, >> >> It's only a reverse proxy cache, not a proxy. This is different. >> We use squid only for images. >> >> Squid : 3.1.x >> OS : debian 64 bits >> >> Le 12/03/2012 12:44, Student University a écrit : >>> Hi David ,,,, >>> >>> You achieve 2K with what version of squid ,,, >>> do you have any special configuration tweaks ,,, >>> >>> also what if i use SSD [200,000 Random Write 4K IOPS] >>> >>> Best Regards ,,, >>> Liley >>>
