brief, brief comment it is interesting how reluctant you are to use a real dbms considering you are already taking advantage of the dbms and the fact we (SDSS) already did the job of creating a galaxy table for you.
If you want to do the real test you should go to the DAS and start collecting the cvs files cheers Maria On Tue, 21 Nov 2006, Leif Hendrik Wilden wrote: > Jacek wrote: > > > Thanks, but I am not sure if we want to put any energy into evaluating > > ROOT at this point. For a variety of reasons LSST would MUCH prefer to > > use a real database. We don't even have sufficient resources to look > > into major dbms players like DB2 and/or Oracle (even though they are > > very much interested in helping us) > > Hi Jacek, > > I do not think that ROOT can do the job for LSST and I was certainly not > suggesting that it should be used. ROOT completely lacks all the > features LSST will need to dynamically maintain the database at the base > center. There may be some use cases for ROOT in different areas - but > this needs a lot more thought and discussion. > > My intention was to start thinking of how to evaulate the performance of > a "real database". With the results from the benchmark I can now roughly > estimate how well the SDSS SQL server implementation actually works. It > works better than I thought considering experiences with the MS SQL > server I had a few years ago, but it is still significantly slower than > a well implemented file based approach. > > Sorry if that did not become clear. > > - Leif. > _______________________________________________ > LSST-data mailing list > [email protected] > http://www.lsstmail.org/mailman/listinfo/lsst-data > -- ------------------------------------------------ Maria A. Nieto-Santisteban ([EMAIL PROTECTED]) Johns Hopkins University 3400 N. Charles St. Physics & Astronomy Department Baltimore, MD 21218 (USA) Tel: 1 410 516-7679 Fax: 1 410 516-5096 _______________________________________________ LSST-data mailing list [email protected] http://www.lsstmail.org/mailman/listinfo/lsst-data
