Linked by Thom Holwerda on Mon 18th Jan 2010 16:57 UTC, submitted by wanker90210
Hardware, Embedded Systems ACM's latest journal had an interesting article about RAID which suggested it might be time for triple parity raid. "How much longer will current RAID techniques persevere? The RAID levels were codified in the late 1980s; double-parity RAID, known as RAID-6, is the current standard for high-availability, space-efficient storage. The incredible growth of hard-drive capacities, however, could impose serious limitations on the reliability even of RAID-6 systems. Recent trends in hard drives show that triple-parity RAID must soon become pervasive."
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Is there any particular reason that btrfs isn't as good?

According to its web site, "btrfs is under heavy development and is not suitable for any uses other than benchmarking and review. The btrfs disk format is not yet finalized but it will only be changed if a critical bug is found and no workarounds are possible."

In the mean time, if you need a robust production file system I would recommend choosing a mature file system that's more appropriate for your needs. For example, GFS or OCFS2 are enterprise ready clustered file systems. They are both GPL licensed but I wouldn't be so concerned about licensing unless you have overwhelmingly strong beliefs that require you to strictly adhere to superstitions instead of relying on more rational metrics like performance and stability.

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