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Tag: Exam E20-816 (update October 25th, 2015)

Exam E20-816: Symmetrix Solutions Expert Exam for Technology Architects (update October 25th, 2015)

What is a likely cause for this performance issue?

Refer to the exhibit. A customer requested that you conduct a performance evaluation test
for migration of a DB2 database server to new Symmetrix VMAX storage. The test storage
is configured as 20 logical volumes allocated on four FE ports to two HBAs in the server.
Each volume is 50 GB and is configured as a 4 way striped meta. The results of the test
indicate 20% less throughput than was expected. The exhibit shows results from the data
collected during the time frame of the test. What is a likely cause for this performance
issue?

What should the customer change to enhance performance of the host?

Refer to the exhibit. A customer engaged technical support for a performance issue with
their application. The exhibit shows IOPS for the four FA processors utilized to connect the
HPUX host to the storage. The FA processors are dedicated to the application. All logical
volumes, ports and storage are part of a single masking view. What should the customer
change to enhance performance of the host?

what is the minimum number of spindles required to satisfy the performance needs of the database?

Click on the calculator icon in the upper left corner. Refer to the exhibit. You are designing
the Symmetrix VMAX architecture for a DAS-to-SAN SQL Server migration. Currently all
user databases reside on a single locally attached disk enclosure, mounted to “N:\”. You
have decided on RAID-5 protected 15,000 RPM drives for the new SQL database and
RAID-1 for the transaction log. Last week, you configured Perfmon to record the current

IOPS load of the databases during the 8- hour business day, Monday thru Friday as shown
in the exhibit. During an average business day, the transaction log processes 87 GB worth
of data. Following EMC best practices, what is the minimum number of spindles required to
satisfy the performance needs of the database?

What action should be taken to improve Site-A performance?

Refer to the exhibit. A customer has a three-site configuration, where Site-A is running
critical production applications, Site-B receives data from Site-A in SRDF/S mode and is
used exclusively for disaster recovery. Site-C is a new location designed to receive data
from Site-B using Cascaded SRDF. During the initial establish of data between Site-B and
Site-C, significant performance issues were encountered at Site-A. What action should be
taken to improve Site-A performance?

which discount can be taken from the overall write IOPS, when calculating for the database writes?

Click on the calculator icon in the upper left corner. Refer to the exhibit. You are designing
the Symmetrix VMAX architecture for a DAS-to-SAN SQL Server migration. Currently all
user databases reside on a single locally attached disk enclosure, mounted to “M:\”. You
have decided on RAID-1 protected 15,000 RPM drives for the new SQL environment. Last
week, you configured Perfmon to record the current IOPS load of the databases during the
8- hour business day, Monday thru Friday as shown in the exhibit. During an average
business day, the transaction log processes 43 GB worth of data. Following EMC best
practices, which discount can be taken from the overall write IOPS, when calculating for the
database writes?


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