Red Hat Announces RHEL 5.3
Red Hat has announced the arrival of the fourth version of its Enterprise Linux Distro, RHEL 5.3, which adds support for new hardware, a number of virtualisation changes and some other interesting additions. RHEL 5.3 has added over 150 new enhancements, a number of which appeared in Fedora (essentially a development release for RHEL). Some may argue that Fedora stands alone, but it’s clear that Red Hat use Fedora as the foundation for RHEL.
The most notable enhancement in RHEL 5.3 is the support for Intel’s “Nehalem” Core i7 processors – the desktop processors that launched last November and are implemented in a 45 nanometer process, have new micro-architecture and an Opteron-like interconnect called QuickPath – that will be delivered in Servers sometime in March, if all goes to plan.
RHEL 5.3 doesn’t just run on those chips, it also connects to the chip’s power management features, allowing it to save energy, and has been tweaked to take advantage of their simultaneous multi-threading. The Xeon variants of Nehalem for servers will scale up to eight cores, with two visual threads in each core. In a four socket system this will mean that an operating system and its applications will habe 64 threads.
REHL 5.3 also includes OpenJD, which is an open implementation of Jave SE6 development kit and runtime for Java. Red Hat say that the OpenJDK support combined with its JBoss Enterprise Application Platform yields the first enterprise-grade, fully open source Java stack.
The new Distro includes support for Global File System 2, and also includes support for data encryption for block devices using the Linux Unified Key Setup feature. RHEL 5.3 also includes am iSCSI boot firmware table that allows the operating system to be booted from disk arrays linked to servers over an iSCSI link.
REHL releases generally have a number of technology previews, and the new version is not any different. The ext4 file system has been included which is a bridege to the ReiserFS and ext3 file systems and a bridge to BTRFS – a future Linux system.
Other previews include eCryptfs, which is a stacked cryptographic file system that mounts on top of file systems such as ext3, and stateless Linux. The release also includes a tech preview of the GNU GCC 4.3 compiler set.
If you are already a customer with a support contract you’ll get the update for free.













