> -----Original Message----- > From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On > Behalf Of Rajagopal Swaminathan > Sent: Thursday, March 24, 2011 14:49 > To: CentOS mailing list > Subject: [CentOS] {OT] Re: Installing IMA (Integrity Measurement > Architecture) on CentOS 5.5 > > Greetings, > > Having said that, I have this troubling thought for last decade: What > exactly is high availability: is it 24/7 power on time? or is ti "when > needed". Please not it am not talking about the maybe arrogant "on > demand" attitude of a human. > You probably don't want it to be your only reference, but in my opinion Wikipedia has a pretty good first pass definition of high availability [1] means between you and your boss, i.e., "...a prearranged level of operational performance will be met during a contractual measurement period." > This under extreme circumstances in India like 4 hours of (Electrical > Power Load Shedding) outage every day So have you and your boss prearranged a "level of operational performance will be met during a contractual measurement period"? Something like: The system will be available to the users in the building 90% of the time when the local power grid is powered up? [1] http://en.wikipedia.org/wiki/High_availability