Negotiated graceful takeover in a node cluster

Details Negotiated graceful takeover in a node cluster Negotiated graceful takeover in a node cluster

2005-07-19

2005-07-19

Beausoliel, Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S006130, C714S024000

Reexamination Certificate

active

06920580

ABSTRACT:
The invention is a method for operating a file server system in a cluster mode that provides for relatively rapid and reliable takeover of a failed file server in the cluster by a partner file server when the failed file server has detected a fault that will cause it to shut down. This is done by the failed file server requesting the one file server to take over its file services after detecting the fault in its operations, the one file server letting the failed file server complete existing file service requests from clients, refusing further file service requests addressed to the failed file server, and the one file server taking over by transferring file service requests to the one file server. As part of this takeover the one file server takes on the identity of the failed filer and activates network interfaces and network addresses that replicate the failed server's network addresses.

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Anupam Bhide, Elmootazebellah H. Elnozahy, Stephen P. Morgan, “A Highly Available Network File Server,” Proceedings of the Winter 1991 Usenix Conference, Jan. 21-25, 1991, pp. 199-205.

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