On Apr 10, 2013, at 10:37 AM, Kinkie <gkinkie@xxxxxxxxx> wrote: > On Tue, Apr 9, 2013 at 11:35 PM, Youssef Ghorbal <djo@xxxxxxxxxx> wrote: >> Hello, >> >> Is there any recent figures about max throughput to be expected from a squid 3.x install (on recent hardware) in the scenario of a single stream downloading a large file (> 1GB) (read not cacheable) >> I'm aware that's not a performance metric per se, but it's one of the scenarios we have to deal with. >> >> Few weeks ago, Amos talked about 50Mb/s (client + server) for a squid 3.1 > > Hi, > 50mb/s seems a very conservative estimate to me; in that scenario > Squid is essentially acting as a network pipe. > Assuming this is a lab (and we can thus ignore bandwidth and latency > on the internet link), the expectation is that this kind of scenario > for squid will be CPU and network I/O bound, so in order to give any > sensible answer we'd need to know what kind of network interface you > would use (fast-ethernet? Giga-ethernet copper? Giga-ethernet fiber? > Even faster?), what kind of CPU and what kind of system architecture > (server-class? pc-class? virtual?) I'm agree, it's a LAB and we can ignore bandwidth and latency of Internet link. And it's exactly what you said it's a scenario where Squid is essentially acting as a network pipe. Here is a summary of the hardware : - 1Gb ethernet NIC (copper) : the same of client and server traffic. - 16GB RAM - 2 CPUs Quad Core (Xeon E5420 2.5Ghz per core) : I think that the many cores are not relevent since a single stream will eventually be handled by a single core. - FreeBSD 8.3 amd64 What I'm seeing right now is ~50Mb/s on 3.1 release (as Amos said earlier) which seems very conservative estimate to me too, and I was seeking infos on what can be expected in a perfect world. If it's the current best figures I can get, that's fine and I'll not be looking to optmise anything else. If it can do a lot better (let's say 10 times better) I'll try to investgate time to reach this (upgrade to the last release, tune the configuration, tune the system etc) Youssef
