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For larger databases and transactional database workloads,
put the database files and the database log files on Logical
Volumes (using LVM or EVMS). When setting up
a Logical Volume the number of stripes is important. The
number of stripes must be equal to the number of disks
comprising the Logical Volume. The LVM only uses disks
up to the number of available stripes.
For more information see Volume management.
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If the storage server is an IBM TotalStorage
Enterprise Storage Server (ESS), then distribute the disks
for Logical Volumes over several raid arrays and clusters
to achieve best performance. Don't organize them in only
one raid array!
For more information see Disk performance optimizing.
It is also possible to change the ESS subsystem
operating mode (used caching algorithm) for the
ECKD disk devices.
For more information see ESS subsystem operating
modes.
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