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  linuxpromagazine.com » Issues » 2008 » 95 » PIECE OF CAKE  

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Applying updates to an active kernel with Ksplice

PIECE OF CAKE

Author(s): NILS MAGNUS

Uptime is often just as important as updates. but doesn’t a kernel patchbrequire a reboot? Ksplice lets you have your cake and eat it too.

Many administrators don’t relish the thought of installing a new kernel, so most distributions come with package management and installation tools that simplify the task. After you load and install the new kernel and register it with the bootloader, the reboot should take just a couple of minutes. But a couple of minutes of downtime is too long for some applications. If you manage a system used for number crunching, such as in weather simulations, or a system that has to manage a large number of network connections, such as a phone server or online shop, you probably would prefer to avoid a reboot.


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