Re: Fault tolerant Informix-Online based Unix systems?

Spetc@aol.com wrote: > > We now have a 24 hour, high user system. We are about to upgrade to 7.1. We > use use the latest SCO Unix (can't remember the number!). > > My question is this : > > We want to try and eliminate downtime. Is there a hardware / software > confuguration which would provide this? > > In other words if a disk drive, ram chip, disk controller, etc. goes down on > master system A, another system (system B?) invisibly kicks in, seamlessly to > the users, and informs the operator of the hardware error. > > I'm guessing this would have to at least involve disk mirroring and I'm told > it's better to use "hardware mirroring", as opposed to 7.1 mirroring? > > I'm guessing it could never be perfect. For example if we got a long > transaction error on system A then, by virtue of the wonderful mirroring, we > would also have it on system B! > > Any comments, as ever, gratefully received. :) Hi, do you know Tandem Computers? We have a fault tolerant Unix System called Integrity FT. Integrity FT systems use replicated processors, memory boards, I/O processors, and power and cooling subsystems linked by redundant data paths. No single hardware failure can stop the Integrity FT. Integrity FT systems can detect, isolate, and recover from component failures without the operating system or applications being affected. No modifications to applications are required to enable this transparent recovery. To ensure that data is handled throughout the system without loss or corruption, Integrity FT systems offer data integrity through data replication and comparison, write-protection logic, parity checking, end-to-end checksums, disk mirroring, and power-fail protection. And the most wonderful thing is: We have Informix on it. For more information see: http://www.tandem.com Ciao, Peter Ludwig