Differences between "df -m" and summarized "du -sm *" in FC4

[Todd Zullinger]

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Cameron Simpson wrote:
> On 13Jun2006 11:41, Tony Nelson <tonynelson at georgeanelson.com> wrote:
> | At 9:05 AM +0100 6/13/06, Paul Howarth wrote:
> |>On Tue, 2006-06-13 at 08:13 +0200, Joachim Backes wrote:
> |>> having an FC4 server and problems with /tmp:
> |>> df -m says, that /tmp 100% full. But if going to /tmp, calling "du -sm
> |>>*" and summarizing all sizes
> |>> gives a huge difference against the df command (the sum is about 10% of
> |>>the df-value).
> |>>
> |>> Remark: there are no .-files in /tmp so "du -sm *" fits all files in /tmp.
> |>
> |>You probably have a process running that has a a large open file in /tmp
> |>that has been deleted. The disk space is not recovered for use by other
> |>processes until the file is closed.
> |>
> |>Deleting an open temp file is a fairly common technique - it prevents
> |>other processes getting any access to the file.
> | 
> | Could 10% be the root reservation?
> 
> Almost certainly.

I believe that Joachim is saying that the size reported by du is only
10% of the size reported by df.  This would mean the reserved blocks
percentage would have to be 90%.  That doesn't seem likely.  Though
stranger things do happen. :)

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Todd        OpenPGP -> KeyID: 0xD654075A | URL: www.pobox.com/~tmz/pgp
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