SQL Internals Viewer is a tool for looking into the SQL Server storage engine and seeing how data is physically allocated, organised and stored.
Source: Look under the hood of SQL Server Storage engine - Galin Iliev [Galcho] Blog
* Google Reader has two kinds of feeds:
- feeds that have one subscriber (two thirds from the number of feeds, they’re updated every 3 hours)
- feeds that have more than one subscriber (these feeds are updated every hour)
* Google Reader uses 10 TB for storing all the raw data
* Google Reader crawls 8 million feeds
* Google Reader is the only major feed reader that keeps the entire history for all the feeds.
* many Google applications use Google Reader’s infrastructure for feeds: iGoogle, orkut, Gmail’s web clips, Blogger widgets, Google Spreadsheets, Ajax API. Google Reader is the place for any kind of user-driven activities that involve feeds and it’s independent from Google Blog Search.
* the rate of user growth = the rate of growth for the number of feeds
* the index size grows 4% every week
* 70% of the Google Reader traffic comes from Firefox (a lot of geeky users)
* Gmail and orkut are the only Google applications that have a bigger number of pageviews/user than Google Reader
* search requires a lot of computational resources. Google Reader uses two indexes for search:
- a big tree updated twice a day (150machines, 600 million documents)
- 40 small trees for recent posts, updated every 5 minutes (40 machines, 40million documents)
* future features:
- very soon: internationalization, feed recommendations, accepting pings sent to Google Blog Search
- in the near future: simple clustering based on links (posts that link to the same page), adding comments to the shared items
- idea for monetization: adding AdSense ads and sharing the revenue with publishers, assuming they use AdSense
Source: Google Operating System
The free of charge Ruby Connector brings the .NET and Ruby world closer together. The library is provided by SapphireSteel Software, the makers of the Ruby in Steel IDE. To avoid confusion: Ruby, for the Ruby Connector, means Ruby 1.8.x, the Ruby interpreter provided by Yukihiro Matsumoto (also called MRI). Neither Ruby.NET nor IronRuby are involved.
The SapphireSteel blog shows an example of a GUI form built with Visual Studio that connects to Ruby and fetches and sets data. For Windows or .NET developers, this allows to reuse the existing GUI creation tools to build a GUI, while keeping the program logic in a Ruby backend.
Source: InfoQ
http://www.sapphiresteel.com
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