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Anyone know how to get Fiber Channel adapter performance statistics out of Linux? I.E throughput.

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You can treat it like normal I/O device and collect information using iostat during high I/O/. You can also use tools like iozone.

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You could look at the files in /sys/class/fc_host/hostX/statistics (where X is the number of your HBA), computing a rate from the absolute numbers. The number are in hex (0x...) for some obscure reason. This works for Emulex (lpfc) and Brocade (bfa) HBAs at least.

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