search for: rdbs

Dear R-Help, I am working on a paper in an R course for large file support in R using scan(), relational databases, and XML. I have never used SQL or heirarchical document formats such as XML (except where it occurs without user interaction), and knowledge in RDBs and XML is lacking in my program. I have tried finding a working example for the novices-novice on the topic, read many postings, the r-data I/O manual several times, and descriptions of packages RODBC, DBI, XML, among others. I understand that RDBs are (assumed at least) used widely among the R co...

...statistics/Epidemiology/Research Design Center for Clinical and Translational Science (CCTS) apl. Professor, Eberhard-Karls-University, Tübingen 1230 York Ave #121B, Box 322, New York, NY 10021, US Tel: +1 (212) 327-7175, Fax: +1 (212) 327-8450 kmw@rockefeller.edu, www.rockefeller.edu/ccts/rdbs [[alternative HTML version deleted]]

...t; just an idea: > > If you run Oracle / RDBM, read cache should not be of any > use because a > well sized RDBM (except a warehouse) should not do many > reads. If a well > sized RDBMs does reads (ok we are not talking MyISAM here > :), it > requests NEW data and a good RDBS does query for this data > only once - > so read cache is not of much use (except if it is a magic > one, > pre-reading guessed future-request addresses). > > So my idea would be to disbale the device read-ahead for > the Oracle > ZVOLS / folders by setting "primary...

...for qualified Ruby on Rails developers to work on a client web portal project in Midtown Manhattan for a large financial research company. Requirement Overview: Ruby / Ruby on Rails developer with strong object oriented programming background. Good understanding of model driven architecture, MVC, RDBS and data modeling. Required Skill Set: - BS. in Computer Science (or closely related field) - 1+ years of Ruby on Rails or 2+ years predominantly using the Ruby language - Demonstrated experience/knowledge building high-volume and customer facing database-driven web applications. - Experience bui...