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Re: Why ext3 doesn't need defragmentation ?




On Nov 18, 2007, at 10:57 AM, Paul Johnson wrote:

On Nov 17, 5:00 am, Bruno Costacurta <pubmb....@pt.lu> wrote:
Hello,
it appears that ext3 doesn't need a real defragmentation operation (by 'real' I mean a specific tool that need to be run sometimes related to disk usage).

Is it correct ?

Right.

If so how it works ?

It shoots for blocks most able to handle the entire data chunk instead
of shooting for the first available chunk no matter what like every
Microsoft filesystem does.

Keep in mind, though, that this will only prevent fragmentation if there's a sufficient amount of free space on the disk. If you constantly keep the disk close to full you will still get fragmentation, just because there aren't many free space chunks to shoot for.





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