Nancy P. Kronenberg

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A VAXcluster is a highly available and extensible configuration of VAX computers that operate as a single system. To achieve performance in a multicomputer environment, a new communications architecture, communications hardware, and distributed software were jointly designed. The software is a distributed version of the VAX/VMS operating system that uses a(More)
his article describes several aspects of porting the Open VMS TM operating system from the VAX TM architecture to the Alpha AXP TM architecture. The VAX architecture is an example of Complex Instruction Set Computing (CISC). The Alpha AXP architecture is an example of Reduced Instruction Set Computing (RISC) and is very different from VAX [5]. It is well(More)
This paper describes VAXclusters, a highly available and extensible configuration of VAX computers that operate as a single system. A VAXcluster is a "closelycoupled" structure in that it shares characteristics of both looselyand tightly-coupled systems. For example, it has separate processors and memories connected by a message-oriented interconnect, yet(More)
Adtlitional features were needed in the VMS softw;~rc t o accommodate accessing disks on multiple systems. The distributed lock manager, described by Sandy Snaman and Dave Thiel, provides the synchronization needed to accon~plish transparent data transfers between cluster members. Other changes were also needed to broaden the file functions performecl by(More)
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