> > Hi Everyone, > > > > Nowadays I am planning building a load-balanced squid + web nodes cluster. > > The detailed information: > > Operating System: Linux 2.6.9 > > Squid-2.6-Stable-15 > > I'd highly recommend upgrading your requirements a little: > > Linux 2.6.22+ (Ideally 2.6.24, but that may still be too cutting-edge for > high-performance use, and 2.6.20 is the minimum for a number of apps) > > Squid 2.6.stable19 > On this point, I will follow your advice this time. > > > > Here we have two options: > > > > squidA + Apache1 > > Lvs + > > > > squidB + Apache2 > > > > (Lvs = linux virtual server) > > SquidA forms sibling relationship with SquidB using ICP. > > Apache1 is parent (original server) to SquidA. > > Apache2 is parent (original server) to SquidB. > > > > > > The other is > > > > > > Squid-parentA + apahce1 > > Squid-child + > > Squid-parentB + apahce2 > > > > > > Squild-child round robins Squid-parentA and Squid-parentB. > > > > Anybody has any suggestions on the two options? > > Which is better of the two implementations? > > That depends on your expected traffic volumes and speed requirements. I > have a vague idea what you mean by LVS. You mean using DNS to round-robin > the A-record IPs and just point at a CNAME right? LVS is a very good Open Source Linux Load-balancing Software by Wensong Zhang, and it is proven to be very efficient and stable in large websites. For your reference, http://www.linuxvirtualserver.org/ Using this LVS and High-Arability Suite, such as heartbeat we can avoid the single point of failure problem. > For highest performance and reliability I'd pick the first option unless > there was some other topology feature that obsoletes the reliability edge. > > Performance-wise; > current squid production releases are proven only to around 800req/sec. > So below that either setup is equally effective. But above that the > first proposal will be better for you. > > Reliability-wise; > The second config leaves you with a single-point bottleneck which may at > some point fail. If it does it takes out access to the child proxies. > In the end, I appreciate your great suggestions and will take on some upgrades and experiments. Xu Feng Shanghai,China
