Wednesday Jul 31, 2013

Using Ksplice for diagnostic purposes

laptop and stethoscope by jfcherry, on Flickr
laptop and stethoscope by jfcherry (CC BY-SA 2.0)

We've been emphasizing the benefits of using Oracle Linux with Ksplice rebootless updates several times already. The ability to minimize downtime when applying rebootless patches to the Linux Kernel is a feature unique to Oracle Linux, and a growing number of customers realize the benefits of this technology.

Since we acquired Ksplice two years ago, we've continued to improve and further integrate this functionality in Oracle Linux. For example, we implemented the the Ksplice offline client (which I mentioned in this YouTube whiteboard session some time ago), the Ksplice Inspector, or the RedPatch utility.

But did you know that we use Ksplice for diagnostic purposes, too? As part of our Oracle Linux Premier Support offering, we can make use Ksplice to enable additional debugging functionality on your production system, if we need to track down an issue in your environment. Instead of asking you to reboot into a custom Linux kernel that contains additional debugging code, we now simply create a custom Ksplice patch that helps us to gather the required information, while your system keeps running. Once we've obtained the necessary details, you can simply remove the debug patch with Ksplice at runtime again, without any interruption. The additional debugging information helps our support team to determine the root cause of your issue. In case it turns out to be a genuine bug in the Linux kernel, we will then develop and provide a bug fix for this particular problem in the form of a new Ksplice patch, which you can apply while the system keeps humming along. Bug analyzed and fixed, no reboot was required!

To learn more about his feature and the other advantages of Ksplice, take a look at Wim's recent blog post "The Ksplice differentiator".

Wednesday Mar 21, 2012

Want to Patch your Red Hat Linux Kernel Without Rebooting?

Patched Tube by Morten Liebach
Patched Tube by Morten Liebach (CC BY 2.0)

Are you running Red Hat Enterprise Linux? Take back your weekend and say goodbye to lengthy maintenance windows for kernel updates! With Ksplice, you can install kernel updates while the system is running. Stay secure and compliant without the hassle.

To give you a taste of one of the many features that are included in Oracle Linux Premier Support, we now offer a free 30-day Ksplice trial for RHEL systems. Give it a try and bring your Linux kernel up to date without rebooting (not even once to install it)!

For more information on this exciting technology, read Wim's OTN article on using Oracle Ksplice to update Oracle Linux systems without rebooting.

Watch Waseem Daher (one of the Ksplice founders) telling you more about Ksplice zero downtime updates in this screencast "Zero Downtime OS Updates with Ksplice"

- Lenz

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Contributors:
Rick Ramsey
Kemer Thomson
and members of the OTN community

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