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Scott Drummonds on Virtualization

SIOC Event: Ignore or Panic?

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A colleague of mine recently reported an alarming event witnessed at a customer of both EMC and VMware. After enabling Storage IO Control (SIOC), vCenter reported a possible problem with a datastore. The specific text of the event is:

External I/O workload detected on shared datastore running Storage I/O (SIOC) for congestion management

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