Friday Apr 11, 2014

Friday Spotlight: Easy Access to Java on Oracle Linux

Happy Friday! Our spotlight this week is on an excellent blog post by Oracle Senior Vice President of Linux and Virtualization, Wim Coekaerts. Wim describes the new Java channel on ULN that you can use to easily install Java on Oracle Linux.

Read "Easy access to Java SE 7 on Oracle Linux".

Also, please don't forget that beta 1 of Oracle Linux 7 is now available! If you'd like to try it out, you can get it here.

See you next week!

-Chris 

Thursday Apr 10, 2014

Announcing the availability of Oracle Linux 7 Beta 1

We are pleased to announce the availability of the first beta build for Oracle Linux 7.  The beta is available to download from the Oracle Linux download page on Oracle Technology Network.  The Oracle Linux 7 beta includes the latest beta build of Unbreakable Enterprise Kernel (UEK) Release 3 Update 2, as well the Red Hat Compatible Kernel (RHCK).  We are very interested in your feedback and have setup a new mailing list for users to post their questions and comments.  For more information please review the Oracle Linux 7 Beta Release Notes.

Thursday Aug 29, 2013

Beta 1 of Unbreakable Enterprise Kernel Release 3 now available

We are happy to announce the availability of Beta 1of the Unbreakable Enterprise Kernel Release 3 for Oracle Linux 6. The Unbreakable Enterprise Kernel Release 3 (UEK R3) is Oracle's third major release of its heavily tested and optimized operating system kernel for Oracle Linux 6 on the x86_64 architecture. It is based on the mainline Linux version 3.8.13.

The 3.8.13-13 release also updates device drivers and includes bug and security fixes. Some notable improvements in functionality and new features include:

  • Numerous stability and scalability enhancements
  • Inclusion of DTrace 0.4 for Linux into the kernel (no longer a separate kernel image). DTrace for Linux now now supports probes for user-space statically defined tracing (USDT) in programs that have been modified to include embedded static probe points.
  • Btrfs file system improvements (subvolume-aware quota groups, cross-subvolume reflinks, btrfs send/receive to transfer file system snapshots or incremental differences, file hole punching, hot-replacing of failed disk devices)
  • Improved support for Control Groups (cgroups) and Linux containers (LXC).
  • The ext4 file system can now store the content of a small file inside the inode (inline_data).
  • TCP fast open (TFO) can speed up the opening of successive TCP connections between two endpoints.

The Unbreakable Enterprise Kernel Release 3 can be installed on Oracle Linux 6 Update 4 or newer, running either the Red Hat compatible kernel or a previous version of the Unbreakable Enterprise Kernel. The UEKR3 beta kernel packages and supporting userland utilities can be installed using the yum package management tool from the public-yum server.

For installation instructions and more details on the new features, changes and any known issues, please consult the Release Notes found on our public beta site.

We've created a dedicated public beta test discussion forum — please join us and share your observations and impressions there!

Thursday Apr 05, 2012

DTrace for Oracle Linux news: new beta release and conference appearances

A new set of RPM packages of our port of DTrace for Linux has just been published on the Unbreakable Linux Network. This is another beta release of our ongoing development effort to bring the DTrace framework to Linux.

This release includes the following changes:

  • The packages are now based on the final public release of the Unbreakable Enterprise Kernel Release 2 (2.6.39). The previous beta drop was based on a development version of the 2.6.39 kernel; there is no new functionality specific to DTrace in this release. The primary goal was to get the code base in sync with the released kernel version.
  • Based on the feedback we received from some users in how their applications interact with dtrace, libdtrace is now a shared library. However, the API/ABI is not fully stabilized yet and may be subject to change.
  • As a result of the ongoing QA testing, some test cases were reorganized into their own subdirectories, which allows running the test suite in a more fine-grained manner.

As reminder, we have a dedicated Forum for DTrace on Linux, to discuss your experiences with this release.

This week, the Linux DTrace team also attendeded the second dtrace.conf in San Francisco, to talk about their work. The sessions were streamed live and recordings are also available. You can watch Oracle's Kris Van Hees' talk below:


Video streaming by Ustream

We would like to thank the dtrace.conf organizers for the speaking opportunity and for organizing this event!

This Wednesday (April 4th), Kris and Elena Zannoni also spoke on this topic at the Linux Foundation Collaboration Summit 2012 in San Francisco, CA. The slides are now available for download (PDF).

Friday Feb 24, 2012

Updated Unbreakable Enterprise Kernel Release candidate packages now available

A new build of the Unbreakable Enterprise Kernel release 2 has been published today: version 2.6.39-100.1.1 of the kernel including updated userspace utilities have been uploaded. They are now available for testing from the Unbreakable Linux Network as well as the beta channel on our public yum server. There have been a lot of fixes and improvements to the Btrfs file system in particular, as well as driver updates. The public git source repository has also been refreshed.

As we're nearing the final release of the Unbreakable Enterprise Kernel Release 2, we welcome your testing and feedback. We have created a dedicated Oracle Linux and UEK beta testing forum for this purpose - please join the discussions and share your experiences with this kernel build! Thank you.

Wednesday Feb 22, 2012

New beta release of DTrace for Oracle Linux

We have just published an updated set of RPM packages of DTrace for Linux on the Unbreakable Linux Network. This beta release of our ongoing development effort to bring the DTrace frame work to Linux is now based on the current Unbreakable Enterprise Kernel Release 2 (2.6.39) and includes a number of improvements and new functionality:

New features:

  • The SDT (Statically Defined Tracing) provider is implemented, providing in-kernel static probes. Some of the proc provider is implemented using this facility.

Bugfixes:

  • Syscall tracing of stub-based syscalls (such as fork, clone, exit, and sigreturn) now works.
  • Invalid memory accesses inside D scripts no longer cause oopses or panics.
  • Memory exhaustion inside D scripts no longer emits spurious oopses.
  • Several crash fixes.
  • Fixes to arithmetic inside aggregations, fixing quantize().
  • Improvements to the installed headers.

To get started, take a look at Wim's latest blog post about using DTrace on Oracle Linux. 

The DTrace port is work in progress and is still considered a "technology preview" - the usual disclaimers apply. We have created a dedicated DTrace on Linux forum where you can share your experiences with the Linux version and give feedback to us. We look forward to your comments!

Friday Jan 06, 2012

New beta drop of the Unbreakable Enterprise Kernel Release 2

We've published a new beta release of the Unbreakable Enterprise Linux (Release 2). The package version is kernel-uek-2.6.39-100.0.18 and is now available for both Oracle Linux 5 and 6 (64bit only).

If you're already subscribed to the UEK2 beta repository, you can simply run "yum update" to obtain the latest bits. Otherwise simply follow the instructions outlined on that page to enable this yum repository and install the updated kernel RPMs.

Some of the notable changes in this release in comparison to the first beta:

  • Updated code base from mainline Linux 3.0.6 to 3.0.13
  • Numerous Btrfs updates/fixes
  • iSCSI updates/fixes
  • Added/updated device drivers (be2iscsi, be2net, lpfc, mlx4_en, mpt2sas, netxen_nic, oracleasm, qla2xxx, qla4xxx, qlnic)
  • Xen updates
  • Lots of bug fixes

You can clone or browse our public git source tree for more details on the changes that have been made.

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