Thank you for the additional information. I finally found my old laptop's internal CD-ROM drive, so I'll be able to at least check if the issue is USB-related. I just need to open the laptop to install it. After which I'll tinker with the cluster sizes and test further.
Glen On Wed, Jul 13, 2016 at 10:30:33PM -0700, Maxim Sobolev wrote: > Hi Glen, nice update, glad being of some help. The slowdown may be related > to the fact that geom_uzip reads whole compressed cluster, which is 20-30k > typically, even if only single block from that cluster is requested. I > imagine it might impact rc.d, which is essentially bunch of small(ish) > shell scripts and I would not be surprised if their blocks would be > scattered all over the place. There is some very basic caching in the > geom_uzip module, but it is only one cluster deep. What might help if you > still have some room on the CD is to decrease cluster size (-s parameter of > mkuzip), to something like 32k or even 16k. That would make compression > less effective, but would reduce the I/O bandwidth waste, which could also > be important for the KVM setups. I might also look into making a bigger > cache, as RAM is getting cheaper and more abundant every day. Another > approach would be to make several "partitions", segregating for example > /etc stuff so it's all tighly packed together and you can also use smaller > cluster size for /etc and bigger for the rest. In any case, keep me posted > with your findings. > > -Max > > On Wed, Jul 13, 2016 at 3:12 PM, Glen Barber <g...@freebsd.org> wrote: > > > Just replying to the first email in the thread, since it's a general > > reply, and only related to the original topic at hand, and only for > > informative purposes at this point. > > > > On Mon, Jul 11, 2016 at 11:01:51PM +0200, Ronald Klop wrote: > > > Just downloaded the amd64 BETA1 ISO (873MB) and tried to burn a CD on > > > Windows 10. It complained that the ISO is too big for my 700 MB CD-r. > > > > > > > I have *something* semi-working, with a huge amount of help from Maxim > > in private email. There is still a nit or two to fix, I'm running into > > them as I rebuild the ISO after fixing the prior issue. But, right now, > > I can get the ISO to boot enough to get to a shell (the "init failed due > > to inability to mount '/'" shell, but it is still a shell). :) > > > > Once I get what I have now into a state where it's somewhat committable, > > I'm going to create a project branch to sand off the edges, instead of > > doing it directly in head, since there might be some edge cases for > > non-x86 architectures. (But some other architectures do not have the > > "too big" problem.) > > > > Once that is merged, I fully intend to merge this to stable/11, provided > > there is no major fallout. With what I have now, disc1.iso is 630M, and > > the disc1.iso.xz is 554M. I'll upload an image somewhere public for > > people to test 11.0-BETA1 on hardware, KVM, etc. One thing to note, > > though, there appears to be a significantly non-zero speed decrease, > > though this may just be because my CD-ROM is USB-based. When I have the > > ready-to-commit result, I'll test it on a machine with an internal CD > > drive. > > > > Glen > > > > > _______________________________________________ > email@example.com mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
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