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Category: E20-816

Exam E20-816: Symmetrix Solutions Expert Exam for Technology Architects

How can the customer use SPA to determine the potential cause of the high response times?

A customer has the following storage configuration for a specific application:
– Symmetrix VMAX 4 engine with 128 GB cache per engine
– SRDF/A with two 1 Gbps links to remote site
– 4.2 TB of logical volumes configured for SRDF/A replication
– SMC / SPA installed for storage management
The customer is periodically experiencing high response times for the application.
How can the customer use SPA to determine the potential cause of the high response times?

What is the best practice HBA to FA mapping to ensure the required performance of the data warehouse?

A new data warehouse will be hosted on an existing 4-engine VMAX array. The database server
has 4 HBAs connected at 8Gb/s. Due to limited SAN switch ports only port 0 on each VMAX FA is
connected – also at 8Gb/s.
The workload is expected to require at least 1700MB/s of reads @ 128KB I/O size. It must
maintain performance in case of any major component failure in the host, switch or array. Assume
that the existing workload on the VMAX does not exceed 350MB/s per port. Also assume that the
ports can sustain up to 500MB/s without exceeding 70% utilization.
What is the best practice HBA to FA mapping to ensure the required performance of the data
warehouse?


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