'Intermediate relations' presentation slideshows

CS 440 Database Management Systems

849 views • 64 slides

Query Optimization

Query Optimization. Arash Izadpanah. Introduction: What is Query Optimization?. Query optimization is the process of selecting the most efficient query-evaluation plan from among the many strategies usually possible for processing a given query , especially if the query is complex .

827 views • 48 slides

Query Compilation

562 views • 38 slides

Large-scale file systems and Map-Reduce

Large-scale file systems and Map-Reduce. Google example: 20+ billion web pages x 20KB = 400+ Terabyte 1 computer reads 30-35 MB/sec from disk ~4 months to read the web ~1,000 hard drives to store the web Takes even more to do something useful with the data

489 views • 31 slides

438 views • 20 slides