Category Archives: Servers

News and issues relating to server side technology.

ClusterLabs

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Pacemaker keeps your applications running when they or the machines they’re running on fail. However it can’t do this without connectivity to the other machines in the cluster – a significant problem in its own right.

Rather than re-implement the wheel, Pacemaker supports existing implimentations such as Heartbeat. Heartbeat provides:

  • a mechansigm to reliably send messages between nodes,
  • notifications when machines appear and disappear
  • a list of machines that are up that is consistent throughout the cluster

Heartbeat was also the first stack supported by the Pacemaker codebase.

via FAQ – ClusterLabs.

rsnapshot

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rsnapshot is a filesystem snapshot utility for making backups of local and remote systems.

Using rsync and hard links, it is possible to keep multiple, full backups instantly available. The disk space required is just a little more than the space of one full backup, plus incrementals.

Depending on your configuration, it is quite possible to set up in just a few minutes. Files can be restored by the users who own them, without the root user getting involved.

Via rsnapshot.

Set up a Web server cluster in 5 easy steps

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This article illustrates the robust Apache Web server stack with 6 Apache server nodes (though 3 nodes is sufficient for following the steps outlined here) as well as 3 Linux Virtual Server (LVS) directors. We used 6 Apache server nodes to drive higher workload throughputs during testing and thereby simulate larger deployments

via Set up a Web server cluster in 5 easy steps.

lighttpd fly light

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Security, speed, compliance, and flexibility — all of these describe lighttpd (pron. lighty) which is rapidly redefining efficiency of a webserver; as it is designed and optimized for high performance environments. With a small memory footprint compared to other web-servers, effective management of the cpu-load, and advanced feature set (FastCGI, SCGI, Auth, Output-Compression, URL-Rewriting and many more) lighttpd is the perfect solution for every server that is suffering load problems. And best of all it’s Open Source licensed under the revised BSD license.

via lighttpd fly light.