Coalescing change notifications in an I/O virtualization system
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United States of America Patent
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Jun 4, 2013
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N/A
app pub date -
Aug 25, 2010
filing date -
Aug 25, 2010
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Abstract
Efficient and effective mechanisms for coalescing change notifications such as Registered State Change Notifications (RSCNs) are provided. Multiple hosts are connected to an I/O director that allows virtualization of I/O resources including Host Bus Adapters (HBAs) for the various hosts. The I/O director is connected to a Fiber Channel switch. When an RSCN is received by the I/O director, the I/O director queries to Fiber Channel fabric to identify the state change and maintains information about the RSCN so that subsequent redundant RSCNs can be discarded. Change notification information is forwarded to the appropriate hosts connected to the I/O director.
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