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List:       fedora-devel-list
Subject:    Re: F34 Change: Reduce installation media size by improving the compression ratio of SquashFS filesy
From:       Kevin Kofler <kevin.kofler () chello ! at>
Date:       2020-09-17 0:10:45
Message-ID: rju9i6$h9t$1 () ciao ! gmane ! io
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Gary Buhrmaster wrote:
> Some people download once, and install once.  For
> those, it is pay me now, or pay me later, and it may
> be a wash, time wise, depending on your download
> speeds, but it is also just a one time thing in any
> case.  Some people download once, and install lots
> of times (in which case the install time may dominate).
> There is no one size fits all.
> 
> FD: I am in the later group (download once, install on
> many VMs/systems during the lifetime of a release),
> so would likely prefer to see something like zstd gain
> traction at some point, but that is a different discussion.

There is also another group of VM users (mainly testers), who never actually 
install the ISO, but only run it in live mode, in which case it is only the 
live system boot time and runtime performance that are relevant, not the 
installation time. Those metrics are also affected by the decompression 
speed, but not necessarily to the same extent.

(This is not how the Fedora QA team's testers usually work because the 
Fedora QA test protocols include installation, because testing the installer 
and the installed system is an essential part of distribution QA. But not 
all users doing live image testing in VMs are going to test the installer 
this way. We should be careful not to assume that the usage patterns in 
Fedora QA are relevant to all end users and optimize exclusively for those 
usage patterns.)

        Kevin Kofler
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