Per Baatrup wrote:
"dedup" operates on the block level leveraging the existing FFS
checksums. Read "What to dedup: Files, blocks, or bytes" here
http://blogs.sun.com/bonwick/entry/zfs_dedup
The trick should be that the zcat userland app already knows that it
will generate duplicate files so data read and writes could be avoided
all together.
you'd probably be better off avoiding "zcat" - it's been in use since
almost forever, from the man-page:
zcat
The zcat utility writes to standard output the uncompressed
form of files that have been compressed using compress. It
is the equivalent of uncompress-c. Input files are not
affected.
:-)
cheers
Michael
--
Michael Schuster http://blogs.sun.com/recursion
Recursion, n.: see 'Recursion'
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