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Articles for the keywords: xen
26 Jun 2013 Linux-Containers - Part 1: Overview [31581]
Similar to Containers (or Zones) on Oracle Solaris or FreeBSD jails

Lenz Grimmer writes, "Linux Containers (LXC) provide a means to isolate individual services or applications as well as of a complete Linux operating system from other services running on the same host. To accomplish this, each container gets its own directory structure, network devices, IP addresses and process table. The processes running in other containers or the host system are not visible from inside a container. Additionally, Linux Containers allow for fine granular control of resources like RAM, CPU or disk I/O.

Generally speaking, Linux Containers use a completely different approach than "classicial" virtualization technologies like KVM or Xen (on which Oracle VM Server for x86 is based on). An application running inside a container will be executed directly on the operating system kernel of the host system, shielded from all other running processes in a sandbox-like environment. This allows a very direct and fair distribution of CPU and I/O-resources. Linux containers can offer the best possible performance and several possibilities for managing and sharing the resources available..."
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14 Jun 2013 Unbreakable Enterprise Kernel Release 2 Quarterly Update 4 [31396]
Includes driver updates as well as fixes for bugs and security issues

Oracle has announced that the fourth quarterly update release of the Unbreakable Enterprise Kernel Release 2 (Version 2.6.39-400.109) for Oracle Linux 5 and 6 has been published. This release includes driver updates as well as fixes for bugs and security issues.

Some notable highlights include:

  • OpenFabrics Alliance (OFED) 1.5.5 Infiniband stack
  • Btrfs bug fixes and improvements
  • Xen improvements
  • Numerous device driver updates (e.g. storage devices, network cards)

For more details, please consult the release notes.
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17 Jan 2013 Virtualization Performance on Joyent's Public Cloud: Zones, KVM, Xen [29391]
Assessing the Options with Brendan Gregg

Brendan Gregg explains the virtualization technologies Joyent uses to run its high performance public cloud: Zones and KVM on SmartOS. He considers the performance of these technologies from the aspects of characteristics, block diagrams, internals, and results, explaining that Zones adds no overhead, whereas Xen (no longer in use at Joyent) and KVM do, which could limit network throughput to as much as a quarter of its potential. Joyent customers are therefore encouraged to deploy on Zones to ensure better performance, observability and simplicity. This may entail compiling their applications for SmartOS or, if they insist on running Linux or Windows, employing hardware virtualization (KVM).
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08 Oct 2012 Bossie Awards 2012: The Best Open Source Networking and Security Software [27726]
A Large and Growing Range of Offerings

In its Best of Open Source Software (BOSSIE) 2010 awards, InfoWorld has recognized a number of tools for building a network, running a network, and ensuring that the network is secure. Nominees include:

  • DD, WRT, HTTPS, Everywhere, True Crypt, FreeOTFE, Eraser, Darik's Boot and Nuke, Vyatta, Open vSwitch, Elastix, Anti,Spam SMTP Proxy Server, iSpy, OpenNMS, Cacti, Wireshark, Snor, Sagan, Suricata, Snorby, Nmap, Metasploit, BackTrack, Burp Suite, dc3dd , Ophcrack, John the Ripper, GnuPG, FindBugs

Read on for details.
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07 Sep 2011 Bossie Awards 2011: The Best Open Source Desktop and Mobile Software [24556]
Winnners Include VirtualBox VM

Here are the categories for which 2011 Bossie Award winners have been named:

  • Best Open Source Software
  • Best Open Source Desktop and Mobile Software
  • Best Open Source Application Development Software
  • Best Open Source Data Center and Cloud Software

VirtualBox won with this endorsement: "A free-to-use and open source virtualization solution for desktop environments, VirtualBox changed hands from Sun to Oracle when the latter bought the former. That hasn't changed the pace or tenor of its development, though, and the last few revisions -- including a major update to the left of the decimal point -- have continued to pile on reasons to ditch commercial alternatives. For anyone who even dabbles in virtualization, it's gone from useful to must-have."
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