EXT3 Filesystem Oracle Tips by Mike Ault

According to Dr. Stephan Tweety:

The ext3 filesystem is a journaling extension to the standard ext2 filesystem on Linux. Journaling results in massively reduced time spent recovering a filesystem after a crash, and is therefore in high demand in environments where high availability is important, not only to improve recovery times on single machines but also to allow a crashed machine's filesystem to be recovered on another machine when we have a cluster of nodes with a shared disk

… the real objective in EXT3 was this simple thing: availability. When something goes down in EXT3, we don't want to have to go through a fsck. We want to be able to reboot the machine instantly and have everything nice and consistent,,, You can take an existing EXT2 filesystem, throw a journal file onto it, and mount it as EXT3.

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For more information on this topic, I recommend Don Burleson's latest book "Oracle Tuning: The Definitive Reference".  You can buy it direct from the publisher for 50%-off and get instant access to the code depot of Oracle tuning scripts:

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