-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 11/01/2011 09:30 PM, Guillem Jover wrote: > Yes, only dpkg and dselect read configuration files. But then what > would that option be? The only commonish one is admindir.
I'm adding an option to disable all fsync() family calls. Initially I added it as a --force-no-syncs option to dpkg, but then realized that there are many syncs in the lib section used by the other binaries as well, so they need a way to enable the option. How about an environment variable? This may fit in well with apt anyhow, as it can set the variable if it was able to make a btrfs snapshot before it starts running dpkg et al. My preliminary testing shows some impressive results. Comparing ext4, btrfs, stock dpkg, dpkg run with --force-unsafe-io ( set in dpkg.cfg ) dpkg run with libeatmydata, and dpkg with my --force-no-syncs patch so far, I get the following times for Ubuntu 11.10 install and then upgrade ( after separate download ): Stock: Ext4: 6m23s / 6m46s btrfs: 13m43s / gave up - --force-unsafe-io: Ext4: ( didn't bother ) btrfs: 9m20s / 142m Libeatmydata: Ext4: 2m35s / 58s btrfs: 7m20s / 2m55s - --force-no-syncs: Ext4: 7m1s / 4m17s btrfs: 2m36s / 3m12s -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk6woH8ACgkQJ4UciIs+XuLViQCfY3ccB7NY5KBha+tzVPPu3qNv 0EEAnR6RAsJ3rlZvF0mDoAXCGVFuOEso =/meh -----END PGP SIGNATURE----- -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
