Date: Wed, 3 Mar 2010 17:43:11 +0100 From: Joerg Sonnenberger <joerg@britannica.bec.de> To: freebsd-hackers@freebsd.org Subject: Re: GEOM_ULZMA Message-ID: <20100303164311.GA20695@britannica.bec.de> In-Reply-To: <4B8E8E5A.5050203@freebsd.org> References: <20100219163644.da89e882.ray__27111.9062825621$1266591431$gmane$org@dlink.ua> <hlmb66$n0t$1@ger.gmane.org> <20100219222604.44e50248.ray@ddteam.net> <d763ac661002200636u6a0d9546id96fbe2302c7122b@mail.gmail.com> <20100220201510.720c62fd.ray@ddteam.net> <d763ac661002201020g381ab6c0uca6d6fa3f660ed1b@mail.gmail.com> <d763ac661003030001k1055eae8rb106dcc9e73047dc@mail.gmail.com> <4B8E8E5A.5050203@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, Mar 03, 2010 at 08:29:14AM -0800, Tim Kientzle wrote: > Adrian Chadd wrote: > >On 21 February 2010 02:20, Adrian Chadd <adrian@freebsd.org> wrote: > >>Oh I know that! I'm just saying that I may try lzma'ing the kernel and > >>rootfs's to see what kind of savings I get over gzip. :) > > > >The answer is "whoa". 24 megabyte compressed kernel + MDROOT drops to > >6.5 megabytes with gzip -9 and a few bytes shy of 5 megabytes with a > >default lzma compress. > > Interesting question: What is the impact on boot speed? > It could be a lot faster to load 5MB from disk and > decompress to a 24MB image than to wait for 24MB from > disk. I don't think it helps in terms of boot speed, at least as long as the kernel image can be read without constant seeking. Joerg
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20100303164311.GA20695>