High-Availability Scheme Using Data Partitioning for Cluster Systems

Yuzuru MAYA  Akira OHTSUJI  

IEICE TRANSACTIONS on Information and Systems   Vol.E82-D   No.11   pp.1457-1465
Publication Date: 1999/11/25
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Computer Systems
cluster system,  hot-standby computer system,  data partitioning,  availability,  

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For cluster systems consisting of multiple nodes and shared servers which consist of an on-line and a backup server, we propose a hot-standby scheme of shared servers. In this scheme for shared servers, the shared servers have user data and control data. The on-line shared server sends only the control data to the backup server when it receives an update command. When the on-line shared server fails, the backup shared server reconstructs the shared data by using the latest control data sent from the on-line server and the user data sent from each node. We evaluated the system recovery time and the performance overhead for the hot-standby scheme. This enables the system recovery time to be shortened to 30 seconds and the performance overhead to be reduced to 2%.