James Lee wrote:
I haven't seen much discussion on how deduplication affects performance.
I've enabled dudup on my 4-disk raidz array and have seen a significant
drop in write throughput, from about 100 MB/s to 3 MB/s. I can't
imagine such a decrease is normal.
What is you data?
I've found data that lends its self to deduplication writes slightly
faster while data that does not (video, iso images) writes dramatically
slower. So I turn dedupe (and compression) off for filesystems
containing "random" data.
--
Ian.
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