Hi All, On Sat, Mar 17, 2018 at 3:09 PM, Dimitri John Ledkov <launch...@surgut.co.uk> wrote: > On 16 March 2018 at 22:13, Steve Langasek <steve.langa...@ubuntu.com> wrote: >> In other words: if we want to make this the default, we should quantify >> Daniel's remark that he would prefer a 6% faster download over a 10% faster >> unpack. >> > > Well, I think it does not make sense to think about this in absolute > terms. Thinking about user stories is better. > > A stable series user will be mostly upgrading packages from -security > and -updates. The download speed and/or size of debs does not matter > much in this case, as these are scheduled to be done in the background > over the course of the day, via unattended upgrades download timer. > Installation speed matters, as that is the window of time when the > system is actually somewhat in a maintenance mode / degraded > performance (apt is locked, there are CPU and disk-io loads). > > New instance initialization - e.g. spinning up a cloud instance, with > cloud-init, and installing a bunch of things; deploying juju charm / > conjure-up spell; configuring things with puppet / ansible / etc => > these are download & install heavy. However, users that do that > heavily, will be in a corporate / bussiness / datacentre environment > and thus it is reasonable to expect them to have either a fat internet > pipe, and/or a local mirror. Meaning download speed & size, are not > critical. > > Then there are devel series users, developers who do sbuild builds, > etc. These users are most likely to be on slower home-user connections > and watch things a lot more closely interactively, who indeed care > about the total download+install time. These users, are most likely > very vocal / visible, but are not ultimately the target audience as to > why we develop Ubuntu in the first place. Thus I would be willing to > trade personal developer/devel-series user experience, in favor of the > stable series user. I'm not sure how much it makes sense to > proxy/cache/local-mirror devel series, if it is only a single machine > in use. > > -- > Regards, > > Dimitri. > > ps. I fight for the user > pss. /me goes to setup a local mirror proxy cache, with dns spoofing > to make sure all my sbuilds / lxd containers / VM / cloud-images use > local mirror out of the box
I agree with Dimitri's analysis and I'would also like to add one more thing to consider. During unpacking of packages the system is in a transient state where programs may not work correctly. Minimizing the time spent in that transient state is and important additional benefit of speeding up decompression. The speedup varies a lot across use cases and IMO the 10% speed increase is an understatement for many very important use cases. Cheers, Balint -- ubuntu-devel mailing list ubuntu-devel@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel
