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The five best things in Linux 2.6.27

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| None of these changes, taken individually, are game-changing the way that the
| inclusion of KVM (Kernel Virtual Machine) was in the 2.6.21 kernel. KVM lead
| to a totally Linux-based virtualization system and then Red Hat
| incorporating KVM's developers into its own virtualization efforts.
| In the long run, though, I can see these improvements to storage, firmware
| management and networking leading to more companies deciding that Linux is
| the operating system for their mission-critical work. Slowly, but surely, we
| can see Linux improving. Windows? Well, I'm not holding my breath.



Linux is a platform, not an OS

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| Microsoft, a staunch opponent of Linux, already understands this very
| vividly. * They no longer see Windows as just an "operating system", but as
| an entire platform. *They realize that the only way Windows has a prayer of
| surviving, especially in today's open source world, is if everything runs on
| Windows, including every FOSS program out there. *They've even admitted that
| as much themselves, saying that they think that all open source should run on
| Windows.
| And Apple is no different, nor Sun, nor IBM. *They see their respective
| operating systems as platforms, not OS's. *Sure, IBM supports Linux, but they
| also support IBM Unix, and in both cases they see their respective operating
| systems as platforms onto which they place lots of other software. *So
| ultimately one of the biggest failings of Linux marketing is that people are
| working too hard to sell the operating system side of it, but failing to sell
| the platform aspects of it.


Kernel Log: 2.6.27 nearing completion; Btrfs to be added to the kernel?

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| Chris Mason has transferred the source code of the experimental Btrfs file
| system into a Git repository. This move is intended to make it easier for
| other kernel hackers to evaluate the file system and to stimulate discussions
| about incorporating it into the Linux main development branch. Mason believes
| that it would be best to continue development of the file system from now on
| within the framework of the official Linux kernel. If this were to happen, it
| should be with the caveat that Btrfs is not intended for everyday use, in
| much the same way that developers treat the Ext4 file system, which kernel
| hackers have been working to complete within the framework of the Linux main
| development branch since version 2.6.19.


Evaluating the performance of ext3 using write barriers and write caching

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| Well, I think I see where ext3 gets its reputation for slow deletes. With the
| write cache off the delete performance is terrible, nearly 70% lower. It’s
| clear that enabling write barriers does something as the numbers are lower on
| a number of items (though not all). However it’s clear that write barriers is
| minor loss of performance compared to turning the write cache off. I think
| this leads me to consider how many servers I can run with just ext3 and md
| raid1 so as to keep the write cache enabled and the filesystem safe. I’ll
| have to weigh the performance gains against the benefits of using LVM
| (especially snapshots) and dm-crypt (which might have limited benefits on a
| server anyway).
| And of course I’ll be first on the list for testing a Linux filesystem that
| can do snapshots, volumes, checksums, and handle write barriers effectively.
| I’m looking at you Btrfs and Tux3.

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