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Any suggestions on applications that involve alot of calcualtions on a fairly large data set? My app uses a set of raw data ~5k, applies some default/override rules on the raw data and does some calculations on the data in combination with a list of assumptions. A ranked list along with detailed metrics is generated. The end user can manipulate some of the rules and assumptions to generate

I''m looking for best practices / ideas on how to refresh large external data sources. What if your rails app relies on a large data set that you get via some service and it needs to be updated periodically. For instance, lets say your rails app uses weather report and airline flight information. You can get both data sets via some feed mechanism and you would like to use data that

Hi All, I am developing a RoR app for managing community information and would like to have an summary of current events and interests mailed out monthly. The tickler email would be a basic summary of items and links back to the site. I would like to schedule the email delivery dates and have the app send out email to registered users that opted for this service. Once scheduled, a monthly