An imaginary continuous file system.

Hi all,

Recently I am working on a video surveillance system. We use IP-SAN
to store videos. While we are using ext3 as file system, I am
wondering if a special file system would have high IO performance and
be fragmentation proof.

1. Every camera has it dedicated LUN to store its video.
2. Video files has exactly the same size, maybe 20M Bytes.
3. No share access ability since only one dedicated process would read
and write video files.
4. All files stored continuous on hard drive, sector by sector.

and so on...

I am not sure if it would worth that trouble to write my own file
system. Anyway, thinking of writing a file system is very interesting
even if I won't write it
.

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