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N iops / N iops (100%) M iops/s makes no sense #2041
Description
Installing rustup I saw this very curious line pop up:
2 iops / 2 iops (100 %) 1 iops/s in 1s ETA: 0s
but it makes no sense whatsoever as “iops” is already an unit of operations per second. So paraphrased:
2 I/O operations per second out of 2 I/O operations per second, 1 I/O operations per second per second in 1 second.
The units should be fixed up to represent actual whatever being counted here.
Activity
[-]`N iops / N iops (100%) N iops/s` makes no sense[/-][+]`N iops / N iops (100%) M iops/s` makes no sense[/+]kinnison commentedon Oct 7, 2019
In this instance, iops is "I/O Operations" not "I/Os per second" though I concede that there's the potential for confusion.
Rudi3 commentedon Oct 7, 2019
Wikipedia is not the best source, but
IOPSusually stand for "Input/output operations per second".And if I didn't miss anything, you could get something like
Kiiops/s. Which would be "Kibi-i/o operations per second (squared)". 🤣I'm not sure what the non-rate unit for
IOPSwould be though (couldn't find anything on that, really)... In my PR, I went for IO-ops.kinnison commentedon Oct 8, 2019
Fair enough, that seems OK to me. Disambiguation here is key :D
Rudi3 commentedon Oct 8, 2019
But honestly, I've never enountered
iopson rustup.@nagisa could you tell me which command you ran?
nagisa commentedon Oct 8, 2019
I ran the
rustupinstallation command from the website. It showed up briefly when unpacking one of the packages on a slower machine (a mips64 based router manufactured who knows when).Rudi3 commentedon Oct 8, 2019
@nagisa I see. I tried
env RUSTUP_IO_THREADS=4-60used in #1876 (comment), without success...Could you maybe test my pr branch and see if the output is now correct (if you want to)?
kinnison commentedon Oct 8, 2019
You're unlikely to see the iops message unless you have slow IO -- e.g. an NFS mounted homedir, or Windows.