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.htmlIn 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.)>>
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