> Reliable HA is hard and a lot of work to get right. That's why products > like IBM Tivoli Systems Automation for Multiplatform exist.
Reliable full HA is also usually very expensive and it's easy to get sucked into the 'and if we add this we get XX benefit' catalogue shopping or sales spiel. Start with a risk assessment not a catalogue. If you don't know the cost of a failure, a guess at fail rates or the expected recovery time without HA you don't know how much you need to improve and what the justifiable spend is. Sometimes a little bit of redesign to remove the HA requirement from a system can be a lot cheaper than HA, often however with shared consistent data it's not easy or not possible. Alan ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
