Current Slide

Scaling FP-growth by Database Projection

• What about if FP-tree cannot fit in memory?
• DB projection
• First partition a database into a set of projected DBs
• Then construct and mine FP-tree for each projected DB
• Parallel projection vs. partition projection techniques
• Parallel projection
• Project the DB in parallel for each frequent item
• Parallel projection is space costly
• All the partitions can be processed in parallel
• Partition projection
• Partition the DB based on the ordered frequent items
• Passing the unprocessed parts to the subsequent partitions