Oskari Saarenmaa <os@ohmu.fi> wrote:
> Add file cloning as an alternative data transfer method to pg_upgrade.
> Currently only btrfs is supported, but copy-on-write cloning is also
> available on at least ZFS. Cloning must be requested explicitly and if
> it isn't supported by the operating system or filesystem a fatal error
> is thrown.
>
> This provides upgrade performance similar to link mode while allowing
> the old cluster to be used even after the new one has been started.
Please add the patch here to make sure it gets reviewed:
https://commitfest.postgresql.org/action/commitfest_view/open
For more information on the process, see:
http://wiki.postgresql.org/wiki/CommitFest
--
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company