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Re: regarding backsql performance

No kidding! Embedded database systems - 'local' files only with no other overhead of course, from the superficial standpoint will 'out perform' another DBMS that is being used in a client/server mode. These are obvious facts. Once the SQL engine receives the data in an RDBMS vs. the embedded database format, then you can start comparing apples to apples.

Based on what I said initially, looks like there are many liberties being taken to what was implied. Of course I was thinking that we would all be agreeing on the context, which didn't happen; that said, I would like to state clearer, that when in a client/server model naturally there are going to be greater overhead in process boundaries and naming contexts that will not be able to compete with an embedded database. They each have their own market of applicability. For contexts sake from the moment of 'true' processing SQL engine - once the RDBMS system has received it's data - vs. local embedded DBMS, this brings the context and comparison much closer. I too can go out and google benchmarks, but if you want to impress me with truth and facts, let me know how we can bencharmk engine vs. engine, not a Hummer running down the road at 85mph with air resistance for mpg, vs. an engine sitting on a concete block running for same mpg performance... c'mon.

On Fri, 22 Jun 2007, Pierangelo Masarati wrote:

gonzales@linuxlouis.net wrote:
That's funny that you would ask that, seeing as how the initial
statements had no such quantification either... did I make my point?

For a general discussion of why it is unlikely that an RDBMS based database can possibly outperform an embedded database, see <http://www.openldap.org/faq/data/cache/378.html>.

For real numbers, and comparisons with other products, see, for example
<http://www.symas.com/benchmark.shtml> and

Obviously, you can object, there's no comparison with any Directory
Server based on an RDBMS data store.


Ing. Pierangelo Masarati
OpenLDAP Core Team

SysNet s.r.l.
via Dossi, 8 - 27100 Pavia - ITALIA
Office:  +39 02 23998309
Mobile:  +39 333 4963172
Email:   pierangelo.masarati@sys-net.it

-- Louis Gonzales louis.gonzales@linuxlouis.net http://www.linuxlouis.net