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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
72 DS8800 Performance Monitoring and Tuning
If the same extent pool is specified and rotate extents is used as the EAM, the volume
migration is carried out as
manual volume rebalance, as described in “Manual volume
rebalance” on page 63.
Manual volume rebalance is designed to redistribute the extents of
volumes within a non-managed, single-tier (homogeneous) pool so that workload skew and
hot spots are less likely to occur on the ranks. During extent relocation, only one extent at a
time is allocated rather than preallocating the full volume and only a minimum amount of free
capacity is required in the extent pool.
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Publisher Resources

ISBN: 0738436836Purchase book