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March 23rd, 2010 19:00
AIX Dynamic Tracking
The newer versions of AIX allow you to enable Dynamic Tracking so that you do not need worry about the FCID changing. EMC's PowerPath install guide says to enable Fast Fail but does not tell you to enable Dynamic Tracking. Why would you not enable this? Why doesn't EMC tell you to?
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Brion2
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March 24th, 2010 07:00
Hi. With regards to PowerPath, Fast Fail has a direct impact on the number of I/O retries which will affect how quickly a path fails over. Dynamic Tracking is used to support fabric changes without impacting FCIDs. This is why you only see Fast Fail in the PowerPath documentation. There is more information on both of these features in the AIX Host Connectivity Guide on Powerlink. (See link below.) In general, E-Lab recommends enabling Dynamic Tracking when administrators intend to perform those actions associated with this feature.
I hope this helps.
http://powerlink.emc.com/km/live1/en_US/Offering_Technical/Technical_Documentation/300-000-608.pdf?mtcs=ZXZlbnRUeXBlPUttQ2xpY2tDb250ZW50RXZlbnQsZG9jdW1lbnRJZD0wOTAxNDA2NjgwNGE5MDdmLG5hdmVOb2RlPVNvZndhcmVEb3dubG9hZHMtMQ__