Harry Putnam wrote:
Robert Milkowski <mi...@task.gda.pl> writes:

Then is block doesn't compress better than 12.5% it won't be
compressed at all. Then in zfs you need extra space for checksums, etc.

How did the OP came up with how much data is being used?

OP, just used `du -sh' at both ends of the transfer.  On origin end it
is gentoo Linux running reiserfs filesystem

The size allocated is dependent on file system features. For example, a
zero-filled file named "zeros" copied to 3 different file systems shows:

$ du -sh /A/zeros
0K /A/zeros
$ du -sh /B/zeros
16K /B/zeros
$ du -sh /C/zeros
32K /C/zeros

Which is correct? All of them :-)

File system zfs options
-----------------------------------------
A compression=on
B compression=off, copies=1
C compression=off, copies=2

-- richard

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