[SYSTEMDS-1289] Support compressed matrix blocks

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Done
• Fix Version/s: SystemML 0.15
• Component/s: Compiler, Runtime
• Assignee: Matthias Boehm
• Reporter: Matthias Boehm
• Created: 19/Feb/17 06:39
• Updated: 09/Sep/17 01:22
• Resolved: 12/Jul/17 23:13

Description

This task aims to support all fused operator templates over compressed matrix blocks, without decompression.

1) Cellwise and multi-aggregate operator templates (column-wise processing)
2) Row-wise operator templates (row decompression)
3) Outer-product operator templates (column-wise processing)
4) Exploitation of distinct tuples whenever safe to do so.
5) Side input handling with partial decompression (e.g., leverage random access of DDC groups)