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DS8800 Performance Monitoring and Tuning
book

DS8800 Performance Monitoring and Tuning

by Gero Schmidt, Bertrand Dufrasne, Jana Jamsek, Peter Kimmel, Hiroaki Matsuno, Flavio Morais, Lindsay Oxenham, Antonio Rainero, Denis Senin
July 2012
Intermediate to advanced content levelIntermediate to advanced
726 pages
26h 28m
English
IBM Redbooks
Content preview from DS8800 Performance Monitoring and Tuning
616 DS8800 Performance Monitoring and Tuning
Figure 18-15 Remote storage server with D volumes
Figure 18-15 shows the three Global Mirror volumes and the addition of D volumes that you
can create for test purposes. We suggest, as an alternative, a rank with larger and slower
DDMs. The D volumes can be read from another host, and any other I/O to the D volumes
does not affect the Global Mirror volumes in the other ranks. A
nocopy relationship between B
and D volumes reads the data from B when coming through the D volume. So, you might
consider a physical COPY when you create D volumes on a different rank, which separates
additional I/O to the ...
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Publisher Resources

ISBN: 0738436836Purchase book