gang, actually a simpler version of that idea would be a "zcp":
if I just cp a file, I know that all blocks of the new file will be duplicates; so the cp could take full advantage for the dedup without a need to check/read/write anz actual data -- Roland Per Baatrup schrieb:
"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.
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