[TriLUG] Disk space calculations in Linux

[Scott Lambdin]

For the original question, tell her you can get a lot more sweaters in your
closet if you don't hang them up.

On 1/25/08, Alan Porter <porter at trilug.org> wrote:
>
> > If you haven't changed anything, your filesystem is likely set to
> > allocate blocks in 4k chunks.  So, if you have a lot of small files, you
> > lose whatever the difference is ( 4k - size(file) ) per file.
>
> This applies to large files as well.  If the file is 40000k plus 1 byte,
> the file uses 10000 x 4k full blocks, plus one block that contains only
> 1 byte.
>
> So basically, the last block of most files will be a partially-used block.
>
> There is similar fragmentation (not sure if that's the right word in this
> case) in the inodes as well, but that is a little harder to notice.
>
> Alan
>
>
>
> .
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