On 2013-03-06 09:36:19 -0600, Merlin Moncure wrote: > On Wed, Mar 6, 2013 at 8:32 AM, Joachim Wieland <j...@mcknight.de> wrote: > > On Tue, Mar 5, 2013 at 8:32 AM, Heikki Linnakangas > > <hlinnakan...@vmware.com> wrote: > >> With these tweaks, I was able to make pglz-based delta encoding perform > >> roughly as well as Amit's patch. > > > > Out of curiosity, do we know how pglz compares with other algorithms, e.g. > > lz4 ? > > This has been a subject of much recent discussion. It compares very > poorly, but installing a new compressor tends to be problematic due to > patent concerns (something which I disagree with but it's there). All > that said, Heikki's proposed changes seem to be low risk and quite > fast.
Imo the licensing part is by far the smaller one. The interesting part is making a compatible change to the way toast compression works that supports multiple compression schemes. Afaics nobody has done that work. After that the choice of to-be-integrated compression schemes needs to be discussed, sure. Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
