DETERMINISTICALLY ACTIVE-ACTIVE FAILOVER OF REDUNDANT SERVERS IN A NETWORK STORAGE APPLIANCE

Title:

DETERMINISTICALLY ACTIVE-ACTIVE FAILOVER OF REDUNDANT SERVERS IN A NETWORK STORAGE APPLIANCE

Document Type and Number:

WIPO Patent Application WO2006019744

Kind Code:

A3

Abstract:

Deterministic active-active failover of redundant server blades hot-pluggable into a backplane of a network storage appliance chassis is disclosed. Each server monitors the other's heartbeat on a respective path in the backplane. Other paths between the two servers on the backplane enable one server to reliably kill the other server and take over its identity on the network in response to detecting a stopped heartbeat of the other server. The apparatus is superior to a conventional heartbeat link between servers in separate chassis, such as an Ethernet cable, because it is not prone to user removal or damage since the backplane cannot be removed by a user while the appliance is operational and enables each server to know a true heartbeat failure has occurred, as opposed to failure of a conventional external heartbeat link causing each server to each think the other has failed.

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Inventors:

DAVIES IAN (US)

Application Number:

PCT/US2005/024710

Publication Date:

September 14, 2006

Filing Date:

July 11, 2005

Export Citation:

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Assignee:

DOT HILL SYSTEMS CORP (US)
DAVIES IAN (US)

International Classes:

G06F11/20; G06F1/16; G06F13/40; H04L12/26; H05K5/00; H05K7/14

Domestic Patent References:

WO2002101573A2

2002-12-19

Foreign References:

US20030018927A1	2003-01-23
US6609213B1	2003-08-19
US20040111559A1	2004-06-10

Other References:

T. OKANO: "Future Trends of BladeServer: Virtualization and Optimization", NEC JOURNAL OF ADVANCED TECHNOLOGY, vol. 1, no. 2, 20 June 2004 (2004-06-20), pages 119 - 124, XP002374827, Retrieved from the Internet [retrieved on 20060327]
J. REGULA: "Using PCI Express and Non-transparent Bridging in Blade Servers", BLADE LETTER, March 2004 (2004-03-01), pages 12, XP002374828, Retrieved from the Internet [retrieved on 20060329]

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