[elephant-devel] A new Postmodern backend

[Ian Eslick]

Very cool!  When we finish 0.6.1, we can throw it into the new darcs  
development tree as part of the 0.7.0 release plan.  You might write  
some Trac tickets against it (what needs to be done to put it into a  
release, etc) so we can keep track of it.

Did you learn anything about elephant that we should consider  
changing or improving while you wrote the new backend?

Ian


On Mar 9, 2007, at 12:31 PM, Henrik Hjelte wrote:

> I have made a new elephant backend, db-postmodern.
> It uses postgresql for storage, and the postmodern lisp socket  
> interface
> instead of clsql. The implementation is actually quite different from
> the clsql backend.
>
> db-postmodern uses prepared queries and stored procedures for
> performance reasons.
>
> The db-postmodern cursor is based on a sql cursor. Each btree has its
> own database table.
>
> db-postmodern is slower than the berkeley db backend, I guess about  
> four
> or five times.
>
> It now passes all tests and the migration test, but should of  
> course be
> regarded as an alpha. It is only tested on sbcl, but should work on  
> all
> platforms that postmodern supports.
>
> About postmodern:
> http://common-lisp.net/project/postmodern/
> db-postmodern mainly uses the lower level cl-postgres driver in the
> postmodern project.
>
> During development I used a darcs mirror of elephant, and I have
> temporarily put it at common-lisp.net. This darcs branch is  
> intended for
> people wanting to try db-postmodern, and it is not an automatic mirror
> of the cvs elephant.
>
> Download:
>
> To get elephant containing db-postmodern,
> darcs get http://common-lisp.net/project/grand-prix/darcs/elephant
>
> Best wishes,
> Henrik Hjelte
>
>
> _______________________________________________
> elephant-devel site list
> elephant-devel at common-lisp.net
> http://common-lisp.net/mailman/listinfo/elephant-devel