A scalable hash ripple join algorithm
Gang Luo, Curt J. Ellmann, et al.
SIGMOD 2002
Large-scale Machine Learning (ML) algorithms are often iterative, using repeated read-only data access and I/O-bound matrix-vector multiplications. Hence, it is crucial for performance to fit the data into single-node or distributed main memory to enable fast matrix-vector operations. General-purpose compression struggles to achieve both good compression ratios and fast decompression for block-wise uncompressed operations. Therefore, we introduce Compressed Linear Algebra (CLA) for lossless matrix compression. CLA encodes matrices with lightweight, value-based compression techniques and executes linear algebra operations directly on the compressed representations. We contribute effective column compression schemes, cache-conscious operations, and an efficient sampling-based compression algorithm. Our experiments show good compression ratios and operations performance close to the uncompressed case, which enables fitting larger datasets into available memory. We thereby obtain significant end-to-end performance improvements.
Gang Luo, Curt J. Ellmann, et al.
SIGMOD 2002
Peter J. Haas, Gerald S. Shedler
Discrete Event Dynamic Systems: Theory and Applications
Rainer Gemulla, Wolfgang Lehner, et al.
VLDB Journal
Matthias Boehm, Shirish Tatikonda, et al.
VLDB