On Sep 25, 2012, at 1:46 PM, Jim Klimov <jimkli...@cos.ru> wrote:

> 2012-09-24 21:08, Jason Usher wrote:
>>> Ok, thank you.  The problem with this is, the
>>> compressratio only goes to two significant digits, which
>>> means if I do the math, I'm only getting an
>>> approximation.  Since we may use these numbers to
>>> compute billing, it is important to get it right.
>>> Is there any way at all to get the real *exact* number ?
> Well, if you take into account snapshots and clones,
> you can see really small "used" numbers on datasets
> which reference a lot of data.
> In fact, for accounting you might be better off with
> the "referenced" field instead of "used", but note
> that it is not "recursive" and you need to account
> each child dataset's byte references separately.
> I am not sure if there is a simple way to get exact
> byte-counts instead of roundings like "422M"...

zfs get -p
 -- richard

illumos Day & ZFS Day, Oct 1-2, 2012 San Fransisco 

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