Florin Andrei пишет: > Sergej Kandyla wrote: > >> apache is good as backend server for dynamic applications. >> You could use something like nginx, haproxy as frontend for balancing >> multiple backend servers. >> I'm using nginx. This light web server could serve many thousand >> concurrent connections! It works great! >> > > In addition to the user-space solutions mentioned above, there are also > kernel-level solutions, such as Linux Virtual Server, or LVS: > > http://www.linuxvirtualserver.org/ > IMHO it's not right compare light web server with Virtual servers. Look at http://www.linuxvirtualserver.org/whatis.html In this scheme you could naturally use nginx as loadbalancer on the Load Balancer Linux Box. Also "The mission of the project is to build a high-performance and highly available server for Linux using clustering <http://en.wikipedia.org/wiki/Computer_cluster> technology, which provides good scalability, reliability and serviceability." If you need high-availability you could also use XEN\KVM or OpenVZ. These technologies are actively developing... XEN\KVM are supported natively in the RHEL\Centos kernel. I'm prefer OpenVZ as light-weight virtualization. http://wiki.openvz.org/HA_cluster_with_DRBD_and_Heartbeat > I am under the impression that, speaking in general, user-space > balancers provide more features (are smarter), while the kernel-space > ones are faster (provide more in terms of raw speed and max load). I > could be wrong. > > Can anybody provide a performance comparison between, say, nginx and > LVS? (max connections, max new connections rate, max bandwidth, max > packets per second, etc.) > >