Which three metrics can Unisphere QoS control?

A customer has an application with a large sequential I/O pattern and wants to design the storage
for the best possible performance.
Which design solution would you recommend?

A customer maintains a mission-critical database with a small transaction logging file. The
customer would like to have the transaction log share array resources with other applications while
maintaining a specified response time for the database. What Unisphere Quality of Service control
mechanism will provide the necessary functionality?

A customer has implemented Unisphere Quality of Service to ensure that an application obtains
the resources necessary to meet the required service level based on a consistent IOPS level.

However, when the storage administrator reviewed performance of the application, the IOPS were
variable and lower than expected. Other applications are receiving exactly the resources defined
through the performance policies. What might be the problem?

When setting up QoS for a host’s LUNs, what software must be loaded on the host system?

A customer system has the watermark processing disabled. To which value will the low water
mark (LWM) default?

What is the default cache page size in KB on a VNX?

A customer has reported degraded performance with several of the applications that run on a
VNX. After going through the performance data on the array, you find that all the performance
issues are centered around the same RAID 6 group, and that the RAID group is supplying 50
percent less IOPS than before.
What is the most likely reason?

Refer to the exhibit.

The Unisphere Analyzer data shows all disks in a VNX. Using EMC best practices, what would be

the best way of allocating storage from the unbound disks?

Refer to the exhibit.

This VNX has the disks shown in the front view. They are all 300 GB 10K disks.
What is the maximum number of drives that you can add to a new RAID group in this situation?