Kluger.PA@PARC-MAXC.ARPA@sri-unix.UUCP (07/19/83)
Guy M. Lohman Research Staff Member IBM Research Laboratory San Jose, CA R* Project The R* project was formed to address the problems of distributed databases, with the objective of designing and building an experimental prototype database management system which would handle replicated and partitioned data for both query and modification. The R* prototype supports a confederation of voluntarily cooperating, homogeneous, relational database management systems, each with its own data, sharing data across a communication network. Two seemingly conflicting goals of distributed databases have been resolved efficiently in R*: single-site image and site autonomy. To make the system easy to use, R* presents a single-site image: a user's request for data need not be aware of or specify either the location or the access path for retrieving that data, requiring close coordination among sites. On the other hand, to make local data available even when other sites or communication lines fail, each R* database site must be highly autonomous. The talk will discuss how these goals were compatibly achieved in the design and implementation of R* without sacrificing system performance. Thursday, July 21, 1983 4:00 pm Stanford Park Labs Hewlett Packard 5M Conference room 1501 Page Mill Road *** Be sure to arrive at the building's lobby ON TIME, so that you may be escorted to the conference room.