piece focused on the Telum’s redesigned cache, “downtime of these [IBM Z] systems is measured in milliseconds per year.” (If true, that’s at least seven nines.)
IBM’s own announcement of the Telum hints at just how different mainframe and commodity computing’s priorities are. It casually describes Telum’s memory interface as “capable of tolerating complete channel or DIMM failures, and designed to transparently recover data without impact to response time.”
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