background Secure Payment Systems has been around since 1996 processing payments to 10,000+ entities across North America. Providing transactions at the POS or over the web, they require 99.9% uptime. In addition to downtime being unacceptable, Secure Payment Systems is often audited, where High Availability is a fundamental requirement. Altogether, it is imperative that Secure Payment Systems protects their customer transaction data from both unexpected outages and data-loss. business challenge After years of using SCO Unix technologies, Secure Payment Systems wants to upgrade to Linux. They must retain the same High Availability features and functionality they had with their past system. In addition, one new requirement states that they must have data availability in multipl

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