>> Most of you already know I am new to this list and newer to any OSS
>> development. However, while browsing the source code (of 9.0.1) I find
>> that there is only one way to store relations on disk - the magnetic
>> disk.
>The fact that it's called md.c is a hangover from the '80s. These days,
>the logic that the Berkeley guys envisioned being at that code level
>is generally in kernel device drivers. md.c can drive anything that
>behaves as a block device + filesystem, which is pretty much everything
>of interest.
I believe that PostgreSQL was been developed and optimized for
sequential access. To get full advantage of SSDs its necessary to
rewrite almost the whole project - there are so much code written with
the sequential mechanism in mind.
--
Daniel Loureiro