Hallo, Calvin,
Du meintest am 09.04.11:
>> Nice picture. But it doesn't solve the problem that I need a
>> reliable information about the free/available space. And I prefer
>> asking with "df" for this information - "df" should work in the same
>> way for all filesystems.
> The problem is that the answer to the seemingly simple question: "How
> much more data can I put onto this filesystem?" gets pretty hard with
> btrfs.
> Your case is one of the simpler ones - To calculate the remaining
> space for files, you take the unused allocated data space (light blue
> on my picture), add the unallocated space (white), divide by the raid
> mode redundancy, and subtract some percentage (this is only an
> estimate, of course...) of that unallocated space for the additional
> metadata overhead.
That's simple?
Maybe I'm simple minded. But I expect the same meaning of the shown date
with
df <mointpoint>
regardless what kind of filesystem is mounted.
But no test item for an IQ test.
If the value of "available" is unresolvable then btrfs should not show
any value.
Ok - there's a problem slightly similar to the "available" value of
compressed partitions.
Viele Gruesse!
Helmut
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