At the MySQL Conference & Expo 2009, I had lunch with Barry Abrahamson, database architect for WordPress.com, a popular hosting service for ...
June 2010
Intermediate to advanced
328 pages
7h 51m
English
Content preview from SQL Antipatterns
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Legitimate Uses of the Antipattern
One good use of manually splitting tables is for archiving—removing historical data from day-to-day use. Often the need to run queries against historical data is greatly reduced after the data is no longer current. If you have no need to query current data and historical data together, it’s appropriate to copy the older data to another location and delete it from the active tables. Archiving keeps the data in a compatible table structure for occasional analysis but allows queries against current data to run with greater performance.
Sharding Databases at WordPress.com
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