It installs via apt-get nowadays.

I spent a few hours with Ingres yesterday.

Disappointed. Base install, load table, index, do selects. Slower than postgres by a little but. Neither wait for IO, postgres uses a lot less CPU for what seems to be the same task.

But: I haven't played with the partitioned tables / indexes yet, and with a few CPUs idling right now it might get a bit better. Plus, there are other table and index types to try. Not giving up on it yet.

This sucker really evolved with Oracle, step by step. Of course, it doesn't have bitmapped indexes. Sigh.