The Design and Implementation of the RAID-V 2 Distributed Database System *

The RAID distributed database system has proven to be a valuable tool for the experimental investigation of reliability, adaptability, communication, and checkpointlng in transaction-based systems. As we studied these issues and others, we realized that some of design decisions that we made had alternatives that could improve the flexibility and the reliability of the system. OUf experience with RAID has prompted us to re-examine these alternatives and implement a second version. In titis paper, we present a brief synopsis of the original RAID system and our motivation for modifying it. We detail the changes and enhancements that distinguish the new version. We then give examples of the experimental studies that can be conducted using the RAID software. Finally, we list some insights about adaptability and reliability obtained -This research is supported in part by a grant from AIRMICS, and National Science Foundation grant IRI-8821398.