Hi, On Sat, 16 Feb 2013 16:54:52 -0700 Bob Proulx <b...@proulx.com> wrote: > I have also been suffering with the much slower dpkg on Sid. Today I > performed a test of a default debootstrap chroot and had this > benchmark data. I am using a local full mirror so that network > performance is not significant in the measurement. This is using the > stock Sid version of everything up to date as of today operating on an > ext3 filesystem. > > # time debootstrap wheezy testinstall > http://localmirror/ftp.us.debian.org/debian > ... > real 2m58.577s > user 0m49.639s > sys 0m8.749s > > And then using the patched debootstrap script Phillip Susi suggested I > get this result: > > # time debootstrap wheezy testinstall > http://localmirror/ftp.us.debian.org/debian > ... > real 1m17.680s > user 0m49.879s > sys 0m7.988s > > Wall clock time is more than 2x faster for me when avoiding the > unnecessary fsync() calls. Ideally I would like to see dpkg handle > this issue. But since that doesn't seem to be happening it would be > nice if the rest of the ecosystem could work around it. > > Here is the same test again on an ext4 filesystem on the same system > and the stock scripts. > > # time debootstrap wheezy testinstall > http://localmirror/ftp.us.debian.org/debian > ... > real 2m55.402s > user 0m52.107s > sys 0m7.888s > > And again with the eatmydata patched script: > > # time debootstrap wheezy testinstall > http://localmirror/ftp.us.debian.org/debian > ... > real 1m4.819s > user 0m48.455s > sys 0m6.752s > > That is 2.7x faster on ext4.
I've tested it but could not get good result as yours. - Use SSD and USB2.0 connected HDD - both ext4 formatted - debootstrap is patched with https://bugs.debian.org/844118 Without eatmydata on SSD --------------------------- real 2m10.057s user 1m47.776s sys 0m8.060s With eatmydata on SSD --------------------------- real 2m8.640s user 1m47.546s sys 0m8.049s Without eatmydata on HDD --------------------------- real 2m25.136s user 1m47.758s sys 0m8.603s With eatmydata on HDD --------------------------- real 2m26.790s user 1m48.699s sys 0m8.470s So I doubt using eatmydata. -- Regards, Hideki Yamane henrich @ debian.org/iijmio-mail.jp
