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EMC E20-818 Dumps

EMC
Symmetrix Solutions Expert On Implementation Engineers
EMC
Symmetrix Solutions Expert On Implementation Engineers

Questions & Answers for EMC E20-818

Showing 1-15 of 161 Questions

Question #1

A customer has an Oracle 11g production environment that is being remotely replicated

A. Synchronize the remote RBCVs against the R2s. Alter database begin backup. SRDF/A checkpoint, split the RBCVs from the R2. Alter database end backup. Apply online Redo Logs.

B. Alter tablespace begin backup. SRDF/A checkpoint. Apply online Redo Logs. Synchronize the BCVs with the R2s.

C. Split the BCVs from the R2s, SRDF/A checkpoint. Alter tablespace begin backup. Apply online Redo Logs. Synchronize the BCVs with the R2s.

D. Synchronize the BCVs to R2, SRDF/A checkpoint. Alter tablespace begin backup. Apply online Redo Logs. Split the BCVs from the R2s.

Question #2

Which type of read workload produces the worst Symmetrix cache performance?

A. Large block, random access

B. Small block, random access

C. Large block, sequential access

D. Small block, sequential access

Question #3

A customer has asked you to help implement an SRDF/EDP solution. They use a file called
devicefile to create the pairing between the R1 devices at the primary site and the target
devices at the secondary site. The createpair -establish operation fails.
What might be causing the problem?

A. Target devices have no disk space to hold the data from the R1

B. SRDF mode is set to synchronous mode

C. Target devices are write-enabled to the host

D. SRDF mode is set to semi-synchronous mode

Question #4

A Symmetrix V-Max array is configured with RAID 1 and RAID 6 (14+2) devices. In order to
implement Symmetrix Optimizer, which types of devices need to be configured?

A. RAID 1 DRVs

B. RAID 1 DRVs and RAID 6 (14+2) DRVs

C. Unprotected DRVs and RAID 1 BCVs

D. RAID 1 DRVs and unprotected BCVs

Question #5

Flexible Dynamic Cache Partitioning has been implemented on a Symmetrix V-Max array.
Monitoring of the partition used by the mission-critical application shows that the cache
utilization is always at the "Target %". The "Maximum %" has been set higher than the
Target %.
What is a reason for this behavior?

A. Fall Through Time for the cache slots in the other partitions is always less than the Donation Age

B. Donation Age is set to zero seconds for all partitions

C. Donation Age for the mission-critical partition is set higher than the other partitions

D. Fall Through Time for the cache slots in the other partitions is always more than the Donation Age

Question #6

A customer has a critical business application that is supported by a Microsoft SQL Server
database. The transaction log files generated on a daily basis are between 100 and 150
GB. The customer requires that the logs be replicated to the secondary site.
The customer wants to minimize both disk usage and network with disk usage being the
highest priority. They also have an RPO for the logs of four hours.
What is the most appropriate solution for the customer's environment?

A. SRDF/A

B. SRDF/S

C. SRDF/AR

D. SRDF/DM

Question #7

A customer has been creating replicas of several Microsoft Exchange mailbox servers
using Replication Manager. They have recently added a new Exchange Server 2007
mailbox host to the environment.
In addition, the customer has created a scheduled job to create replicas of five storage
groups in consecutive order. Since doing so, they notice that the newly added replica jobs
seem to take a very long time to complete.
What is the source of the problem?

A. NTFS volumes containing the databases were not formatted with the correct cluster size

B. Replication Manager job should have been configured to create the replicas simultaneously

C. Latest Replication Manager Client Service Pack was not installed on the Exchange server

D. Exchange management utilities were not installed on the Replication Manager mount host

Question #8

A Symmetrix V-Max SE array has eight servers attached. The array is currently
experiencing a back-end utilization of about 70%. You would like to increase the workload
on the array by 10%.
Based on Little's Law, what is the expected change in the host response time?

A. Greater than 10%

B. 10%

C. Less than 10%

D. Remains the same

Question #9

A customer wants to provide remote disaster recovery (DR) for several critical mailbox
servers in their Microsoft Exchange Server 2007 environment. Local recoverability is
provided by creating replicas of their critical databases.
The customer's DR site is located 20 km away. They have already provisioned the
necessary failover host on the DR site, as well as the required Active Directory
infrastructure needed to support a failover. However, they want to minimize the total
number of database copies required to provide basic failover capabilities for the Exchange
server.
Which solution would you recommend to provide remote point-of-failure recovery with the
fewest local and remote database copies?

A. R1-R2-BCV

B. Mixed Mirroring

C. STD-R1BCV-R2-BRBCV

D. STD-R1BCV-R2

Question #10

A customer is migrating their Microsoft Exchange 2007 server from DAS to a new
Symmetrix V-Max array. Perfmon was used to create a log view of an average day's
activity against the database LUN of the busiest datastore in the Exchange environment.
This will serve as the performance benchmark for all other database LUNs. There are an
additional three mailbox databases on this server.
How many RAID 1-protected 10k rpm spindles are required to satisfy the performance
needs of the customer for the measured mailbox database on this server?

A. 10

B. 12

C. 14

D. 16

Question #11

A customer is using Oracle Automatic Storage Management (ASM) to manage their Oracle
database. Altogether, eight LUNs are included in the ASM disk group. What should be
done if the customer wants to use TimeFinder/Clone to generate a point-in-time replica?

A. Create a device group that includes the eight LUNs as the source devices. Add another eight LUNs, of the same size, into the device group and use symclone to generate a point-in-time replica.

B. Create a device group that includes only data LUNs as the source devices. Add the same number of LUNs and use symclone to generate a point-in-time copy.

C. Create a device group that includes only the redo LUNs as the source devices. Add another LUN, of the same size, into the device group and use symclone to generate a point-in-time copy.

D. Create a device group that includes the flashback LUNs as the source devices. Add another LUN, of the same size, into the device group and use symclone to generate a point-in-time replica.

Question #12

A Symmetrix V-Max customer is installing Microsoft Exchange Server 2007 and needs to
configure log devices. What is the recommended protection for these devices?

A. RAID 1 only

B. RAID 5 only

C. RAID 5 or RAID 6

D. RAID 1 or RAID 5

Question #13

An Oracle customer has purchased a new Symmetrix V-Max array with a large number of
Enterprise Flash Drives (EFD). However, they still need to place part of the database on
traditional Fibre Channel drives.
Which database component is least likely to benefit from being placed on EFDs?

A. Redo Logs

B. Lookup Tables

C. High Transaction Tables

D. Indexes

Question #14

A customer plans to lay out their Oracle 11g OLTP database across four Symmetrix V-Max
LUNs. Which Oracle component can be combined with the Control files for optimal
performance?

A. System Tablespace

B. Data files

C. Redo Log files

D. Undo Tablespace

Question #15

As reflected a composite group spanning two Symmetrix arrays is set up to run SRDF/Star
using Cascaded SRDF. What is one of the necessary conditions before the SRDF daemon
at Site A will perform an MSC cycle switch?

A. Apply delta sets have finished at Site C

B. Transmit delta sets from Site A to Site B have finished

C. Invalid track count between Sites A and C less than 30,000

D. SYMCLI_STAR_ALLOW_CASCADED_CONFIGURATION option must be enabled in the option file

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