zfs discuss - Apr 2010 - Question about du and compression

Hi all

Is there a good way to do a du that tells me how much data is there in case I
want to move it to, say, an USB drive? Most filesystems don''t have
compression, but we''re using it on (most of) our zfs filesystems, and
it can be troublesome for someone that wants to copy a set of data to somewhere
to find it''s twice as big as reported by du.

Best regards

roy
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On 29 April, 2010 - Roy Sigurd Karlsbakk sent me these 1,2K bytes:
> Hi all
> 
> Is there a good way to do a du that tells me how much data is there in
> case I want to move it to, say, an USB drive? Most filesystems
don''t
> have compression, but we''re using it on (most of) our zfs
filesystems,
> and it can be troublesome for someone that wants to copy a set of data
> to somewhere to find it''s twice as big as reported by du.
GNU du has --apparent-size which reports the "file size" instead of
how
much disk space it uses.. compression and sparse files will make this
differ, and you can''t really tell them apart.

/Tomas
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