Philip Papadopoulos has announced the availability of Rocks Cluster Distribution versions 5.5 and 6.0, two new builds of the project's CentOS-based open-source toolkit for real and virtual clusters: \"The latest update of Rocks, code name 'Mamba' is now released. Mamba is available for both CentOS 5.8 (Rocks 5.5) and CentOS 6.2 (Rocks 6.0). The Rocks-supplied OS rolls have all updates applied as of May 7, 2012. Rolls use the same code base but are compiled on the different version of operating systems. Mamba is available for both 32-bit and 64-bit architectures. New features: Rocks now supports both CentOS 5 and CentOS 6 from the same source code; Xen is no longer supported....