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If /usr for regular WPARs is just a link to the global AIX copy, why are devices and bos filesets being applied?

April 26, 2017AIx copy Devices filesets global link regular usr wpars

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If /usr for regular WPARs is just a link to the global AIX copy, why are devices and bos filesets being applied?

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Each WPAR will have its own /etc and /var and other files that make up parts of AIX. These are built by the installation of the right filesets. The shared /usr is (or should be) static and read only and large in comparison. AIX is something like 2 GB but by sharing /usr and /opt each WPAR size comes down to 50 to 60MB in size.