Ultra Monkey is a project to create load balanced and highly available network services. For example a cluster of web servers that appear as a single web server to end-users. The service may be for end-users across the world connected via the internet, or
The Linux Virtual Server is a highly scalable and highly available server built on a cluster of real servers, with the load balancer running on the Linux operating system. The architecture of the server cluster is fully transparent to end users, and the u
DRBD is a block device which is designed to build high availability clusters. This is done by mirroring a whole block device via (a dedicated) network. You could see it as a network raid-1
Red Hat Cluster Suite is a collection of technologies working together to provide data integrity and the ability to maintain application availability in the event of a failure. Administrators can deploy enterprise cluster solutions using a combination of hardware redundancy along with the failover and load-balancing technologies in Red Hat Cluster Suite.
Pure Load Balancer runs in userland, but relies on an asynchronous non forking/non threaded/non blocking architecture. Thanks to Niels Provos' excellent event library, it can also efficiently use the kernel notification mechanisms to never waste CPU time
"Dell Community Repositories Your Dell PowerEdge systems can be managed using the yum utility that already manages packages for Red Hat Enterprise Linux 5.3 on your nodes. This provides easy access to any Dell provided Linux software, Dell PowerEdge firmware updates, some DKMS drivers, and other open source software. For more information, visit linux.dell.com/repo/community/ If your nodes do not have access to the internet, skip this section and perform manual firmware updates and software installation to your PowerEdge systems as needed. Visit support.dell.com for information. NOTE: The repositories are community supported, and not officially supported by Dell. Use the linux-poweredge mailing list on lists.us.dell.com for repository support. "
Pacemaker is an Open Source, High Availability resource manager suitable for both small and large clusters.
Hardware and application failures can result in prolonged downtime and impact your bottom line.
In the event of a failure, resource managers like Pacemaker automatically initiate recovery and make sure your application is available from one of the remaning machines in the cluster.