November 2001
Intermediate to advanced
158 pages
5h 10m
English
Content preview from IBM ESS and IBM DB2 UDB Working Together
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Appendix A. Data placement tests 109
Eight-path setup
Once a baseline of testing was done using the multi-path setup, we decided to enable eight
paths for all of the arrays which we would be using. This would ensure that (at least from an
ESS / AIX perspective) we should be able to drive the system evenly across all of the
resources we had available.
An important item to remember is that when the virtual pathing changes, the hdisks / vpaths
are also changed. In this case, most of the hdisks in the eight-path setup referred to different
underlying ESS logical disks than they had previously.
Three-path setup
During the course of the redbook internship, the system was moved to a new location. This
opportunity was taken to upgrade from SCSI conne ...
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