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Message Posted: Thu, 21 Jun 2001 @ 19:40:34 GMT

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Subj:   Re: Graceful shut down of Teradata
From:   Keith Roloson

Let me ask the question:

Isn't there a difference between a graceful shutdown of unix, with the associated ability to gracefully shutdown and protect the Teradata database, and a catastrophic electrical disruption?

There is a "gotcha" here with the AWS - the Admin Work Station that manages and controls the config. If the AWS is set to Run with Dual Power, then it perceives the loss of one of two legs of the power supply as a disaster, and the cabinet fails. If you set that to No, then it understands that it has enough power from the other UPS to maintain the integrity of the config.

It seems to me that, if there is an unanticipated power outage, it is a catastrophe, and the rules of fault resiliency and graceful shutdown are not straightforward. Only if........ maybe............ The battery backups are capable, or the AWS is set to not be on Dual Power, could automated rules be fired to have a "tpareset -x" executed to bring down the database gracefully.

Just some thinking out loud here.

Keith Roloson
Teradata Tech Svcs
IBM Global Services/AT&T Acct
Alpharetta Control Center

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