EMC E20-816 Actual Free Exam Questions & Community Discussion

Which Symmetrix VMAX component is involved in measuring sampled average response time?

A data warehouse team is reporting poor performance on their batch reports. The database runs on a Solaris host connected to a DMX-4 array with Fibre Channel drives sized to support a sequential read workload. Which metrics in Performance Manager would be useful in diagnosing the performance issue?

When setting up Symmetrix Access Control, what must be completed before all hosts have been granted Access Control rights (via the Unknown Group)?

When selecting Symmetrix data protection on a VMAX, why would you propose CHAP?

The links between an R1/R2 pair are logically suspended and a half swap is performed on the R2 device. What describes the RDF pair configuration?

Performance Manager is reporting more than 70% utilization on two VMAX FA ports, but the total IOPS per port is low. What is the likely cause and recommended resolution for the high FA utilization?

Refer to the exhibit.

A customer has been performing VLUN Migrations between identical pools and noticed the migration times have varied from minutes to hours. What would explain the variations in the rate of migration?

A customer reports their hosts are performing slowly after migration to a new VMAX array.
You review performance data from the VMAX and note the following:
-I/O sizes are 16 KB.
-The front-end director ports are operating at 1 GB auto-negotiate.
-Several front-end director ports are approaching 100% utilization.
-A few director ports show little or no utilization.
What do you advise the customer?

Within a VMAX storage environment, what would be a benefit of implementing OFA (Oracle Flexible Architecture) supporting an Oracle database application environment?

A customer is implementing a new ESXi cluster and will be provisioning 50TB of storage from Symmetrix Pool Storage. The size of the LUNS being presented is 150GB. Based on EMC Best Practices, on how many storage ports should LUNS be presented?

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?

Click on the calculator icon in the upper left corner. A new Oracle database is being deployed on a VMAX array. The DBA requests 4TB of usable capacity to be managed by Oracle ASM. This includes 2TB for primary data and 1TB for Oracle Flashback capacity. Devices will be provisioned from a single VP pool and will be fully pre-allocated. No remote replication is planned. Which configuration will provide the best performance and availability for the database?