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Method For Synchronizing Start of Multi-node Systems Operation

IP.com Disclosure Number: IPCOM000011755D
Original Publication Date: 2003-Mar-12
Included in the Prior Art Database: 2003-Mar-12

Publishing Venue

IBM

Abstract

In a multi-node system environment where each node has different attachments and resources, rebooting into synchronous multi-node operation may often not be successful. This is due to the differences in delays of various attachments initialization, diagnostics, and application loading. For example, in a multi-node system, one system has RAID storage devices attached while others typically do not. Starting the RAID controller and its attached devices, say 50 attached drives, can take more than 30 minutes because typically one to two devices are spun up in a staged and predetermined sequence. When such a condition occurs, the system having been delayed for 30 minutes after other nodes have already been brought up, jeopardizes the start up of synchronous multi-node operation and as such, often causes synchronous multi-node operation to fail to start properly. This invention discloses a method that will prevent or avoid such a condition from occurring and at the same time maximizes the efficiency in multi-node bring up time.