Red Hat LINUX VIRTUAL SERVER - FOR ENTERPRISE LINUX 5.2 REV 05-2008 Instrukcja Użytkownika Pobierz pdf (Strona 17)

System z kernel features – FCP

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FCP performance data collection:I/O statistics (2.6.25)

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The FCP adapter statistics (available since IBM System z9) provide a variety of

information about the virtual adapter (subchannel). In order to collect this

information the zfcp device driver is extended on one side to query the adapter

and on the other side summarize certain values which can then be fetched on

demand. This information is made available via files (attributes) in the sysfs

filesystem.

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FCP performance data collection: adapter statistics (2.6.26)

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The zFCP adapter collects a number of statistics about the virtual adapter. This

information is fetched by the driver and is exported to user space via sysfs.

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This support is available only on IBM System z9 or later.

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FCP qdio rate improvements (test only)

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The ops/second rate of the zFCP adapter has been increased significantly (x2).

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This support is available only on IBM System z9 GA3 or later.

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4G FICON Express support (test only)

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Ensure that the new 4G FICON links work with the existing zFCP driver.

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Red Hat LINUX VIRTUAL SERVER - FOR ENTERPRISE LINUX 5.2 REV 05-2008 Instrukcja Użytkownika Strona 17