DBDB.io The Encyclopedia of Database Systems · Est. 2017
Database of Databases

GRACE is a parallel relational database machine developed at the University of Tokyo. It targets complex join operations in relational databases by utilizing hash-based clustering and pipeline processing across multiple interconnected modules to reduce computational complexity.

Country of Origin
JP
Start Year
1981
Project Type
Academic

GRACE is a parallel relational database machine developed at the University of Tokyo. It targets complex join operations in relational databases by utilizing hash-based clustering and pipeline processing across multiple interconnected modules to reduce computational complexity.

History[02]


Research for GRACE began around 1981 under Masaru Kitsuregawa at the University of Tokyo. The system was designed to address the complexity of conventional join operations by introducing hash clustering. Its architecture featured multiple processing modules equipped with LSI sorters, a memory module, and a disk module, interconnected via dual ring networks. It served as an early academic prototype for parallel database processing.

Data Model


Joins[03]


The DBMS is famous for pioneering the GRACE hash join algorithm.

Query Interface


SQL

Storage Architecture


System Architecture


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