Implementation

Opportunities for optimization

• Prevent / eliminate unwanted queries=> query estimation (fast index)
  • Query Estimator

• Read all events (qualified for a query) from a file at the same time, without reading all event in the file=> exact index over all properties
  • Order Optimized Iterator

• Share files brought into cache by multiple queries=> look ahead for files needed and cache management
  • Query Monitor

• Match data storage to access patterns=> clustering on tape
  • Clustering Analyzer and Dynamic Reorganizer

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