> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Roy Sigurd Karlsbakk
>
> We're getting down to 10-20MB/s on
Oh, one more thing. How are you measuring the speed? Because if you have data
which is highly compressible, or highly duplicated, you could be virtually
writing tons of data really really fast, but the disks would barely be active
at all. For example, if you
dd if=/dev/zero bs=1024k count=1024 | pv | gzip | pv > zerofile.gz
Then the data rate going through the first pv is 1000 times higher than the
datarate going through the second pv. If I were only looking at the data rate
after compression, then I might falsely reach the conclusion that I was having
bad performance.
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