Title: SquashDelta syncing support Author: Michał Górny <mgo...@gentoo.org> Content-Type: text/plain Posted: 2015-05-xx Revision: 1 News-Item-Format: 1.0 Display-If-Installed: >=sys-apps/portage-2.2.19
Starting with Portage 2.2.19, a new SquashDelta syncing method has been
introduced. It is meant to provide lightweight and efficient solution
for stable systems. The whole repository is contained within a single
pre-generated SquashFS image file. The daily snapshot of the repository
is first fetched from the mirrors, and afterwards updated in-place using
deltas (without repacking).
In order to enable SquashDelta syncing, please install
dev-util/squashmerge utility first:
$ emerge -v dev-util/squashmerge
Afterwards, you can use a repos.conf entry similar to the following:
[gentoo]
location = /var/db/repos/gentoo
sync-type = squashdelta
sync-uri = mirror://gentoo/../snapshots/squashfs
During the initial sync, Portage will fetch the current Gentoo SquashFS
snapshot from the mirrors (~105M). For the synces following, it will
only fetch a single delta, and use squashmerge to quickly update
the local copy.
If possible, Portage will automatically mount (or remount) the SquashFS
after syncing. However, you may want to add an explicit /etc/fstab entry
for the filesystem to make it available before invoking 'emerge --sync':
/var/cache/portage/squashfs/gentoo-current.sqfs /var/db/repos/gentoo \
squashfs defaults 0 0
Please note that the current syncing code does not verify the OpenPGP
signature to confirm the authenticity of fetched snapshots and deltas.
This feature will be added as soon as gentoo-keys support in Portage is
available.
--
Best regards,
Michał Górny
pgpaH0O8FrL2X.pgp
Description: OpenPGP digital signature
