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h3. Linux best practices
* If your kernel version has *stable* support for Ext4, then Ext4 is highly recommended for performance over Ext3 for disk safe storage. *Please note that ext4 64bit Feature is not currently supported.*
* If using Ext4, make sure you are using Ext4 extents. Extents help reduce file system fragmentation.
* Add the mount option barrier=1 to /etc/fstab on Ext3 file systems where disk safes are stored OR disable your storage controller's write cache. Ext3 does not check sum the journal. If barrier=1 is not enabled as a mount option (in /etc/fstab), and if the hardware is doing out-of-order write caching, you run the risk of severe file system corruption during a crash. For more information see: [http://blog.nirkabel.org/2008/12/07/ext3-write-barriers-and-write-caching/]
* Add the mount option barrier=1 to /etc/fstab on Ext3 file systems where disk safes are stored OR disable your storage controller's write cache. Ext3 does not check sum the journal. If barrier=1 is not enabled as a mount option (in /etc/fstab), and if the hardware is doing out-of-order write caching, you run the risk of severe file system corruption during a crash. For more information see: [http://blog.nirkabel.org/2008/12/07/ext3-write-barriers-and-write-caching/]
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