Clustering is the idea of making several computers act as one for the purposes of either performance or reliability. The Clustering Daemon guarantees that a response will be serviced provided at least one cluster node is up. It runs as a userspace process and provides a large amount of flexibility.
Condor is a high throughput system, scheduling and providing large amounts of computational power over a long period of time. It provides the efficient use of a large variety of systems, from idle desktop workstations and dedicated clusters to grid systems all over the world, while its incredibly flexible configuration implements and maintains the machine owner's desired policy for the machine's availability.
distributed.net is a loosely knit group of computer users from all of the world that is taking up challenges requiring lots of computing power (most notably the RC5, DES, and OGR cracking contests). It is simple to participate in the challenges by downloading and running their client software (which uses idle CPU time to complete its tasks).
The ENBD (Enhanced Network Block Device) is an industrial-strength version of the Linux kernel NBD. It makes a remote disk look like a local block device, allowing cheap and safe realtime mirrors to be built over the net. It features internal block-journalling and multichannel failover.
FAI (fully automatic installation) is a non-interactive system to install a Debian GNU/Linux operating system on a group of PCs or a Linux cluster. After installation, the systems are fully configured and ready to run. It is a scalable method for performing unattended installation and updating. Changes to the configuration files of the operating system are made by cfengine, shell, and Perl scripts.
fCluster is a multi-threaded client/server redundancy application for your Linux firewall solution. fCluster is designed for the production environment with features that include: dynamic firewall synchronization, support for both ipchains and netfilter, user definable polling intervals and fail-over sequence, and email notification of a system failure. It also includes a Perl administration utility that allows you to configure both the server and the client from one machine, and view the status of the local and remote machines.
Fsync is a Perl script which allows for file synchronization between remote hosts, containing functionality similar to that of the rsync and CVS packages. Since fsync is a single Perl script, setting up file synchronization on a new machine is relatively simple. Communication between the hosts is via a socket mechanism, with the remote server started by rsh, by ssh or manually. The program was written with slow modem connections in mind. Fsync supports the concept of merging differences from local/remote hosts with hooks for tools to merge the trees. Fsync requires perl 5.004 or newer. This program is licensed under the GNU Public License.