EMC Symmetrix DMX-3, Product Manual

Page: 139 / 326

Optimizing Symmetrix system performance 139
Performance and Optimization
Optimizing Symmetrix system performance
Achieving optimal performance requires careful and detailed
planning of the Symmetrix configuration according to the
requirements of the hosts you are connecting to the Symmetrix
system and your performance needs.
Carefully review the issues listed below with your EMC
representative before the EMC Customer Engineer installs the
Symmetrix system.
Appendix C, “Planning and Installation,”
includes sample worksheets and checklists to assist you in this
process.
Performance
guidelines for open
system devices
Resolve the following open system device issues before installing
your Symmetrix system:
◆
Rank distributed workloads from the busiest to the least busy
(when configuring multiple hosts to a Symmetrix unit).
◆
Determine data storage capacity required for each host connected
to the Symmetrix system.
◆
Determine the number of channels available from each host.
◆
Analyze the nature of the applications executed on the host
connected to the Symmetrix system.
◆
Determine the availability of a Logical Volume Manager (LVM)
on the host and the use of data striping.
◆
Determine and record the use of hypervolumes on the Symmetrix
system, hypervolume size, and the allocation of hypervolumes
between different hosts, different channels, and different
applications.
◆
Determine the maximum drive and file system sizes supported
by each host connected to the Symmetrix system.
◆
Analyze the requirements for device sharing.
◆
Define the number of Fibre Channel directors used and the
number of ports used on each director.
◆
Define any special considerations for host-level mirroring for
device distribution in the Symmetrix system.
◆
Plan for the possibility of upgrading the Symmetrix system with
additional drives in the future and its effect on the configuration
if the system installed is not at maximum capacity.