Browse Prior Art Database

Platform Independent Server System Availability

IP.com Disclosure Number: IPCOM000013990D
Original Publication Date: 2002-Feb-26
Included in the Prior Art Database: 2003-Jun-19
Document File: 5 page(s) / 225K

Publishing Venue

IBM

Abstract

Disclosed is a method to accurately provide historic information about past planned shutdowns and reboots on servers regardless of the installed operating system.

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Platform Independent Server System Availability

Disclosed is a method to accurately provide historic information about past planned shutdowns and reboots on servers regardless of the installed operating system.

Not all operating systems have a unique, time accurate event log indicating a planned server shutdown or reboot. For most of the Unix based systems, the only information available is the length of time the system has been up and running. There is no scheme to acquire accurate time history of the server's shutdowns and reboots, which is universally applicable across various operating systems. Further more, there is no mechanism to acquire the server uptime and downtime histories.

The proposed technique makes available an event list with accurate time stamps of when the server was shut down and rebooted. This information can then be used to precisely measure and chart server downtimes or uptimes. This kind of information will be made available as a part of any system management tool that determines System Availability. For example, Figure 1 represents one graphical way this information is used by System Availability Life Cycle Tool (LCT). Users responsible for determining System Availability for large set of systems require this information. This information is also useful for the IBM Netfinity Software Rejuvenation LCT.

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Figure 1: Graphical Representation of System Availability

The proposed technique makes available a history of unique, time accurate, event logs indicating planned server shutdowns or reboots for any operating system. Currently, during the server boot up stage, the system log is made up of a series of system events of various predetermined processes and services being started. A similar series of system events get logged during the server shut down stage, indicating termination of the processes and services. This includes numerous logs for the kernel processes and also various daemons. Thus, there is no...