E20-598 시험 - EMC실제시험문제와 답 - 237문항

Question No : 1

Based on EMC best practice, what is recommended when creating Avamar domains?

A.A minimal number of domains
B.A domain for every client
C.A domain for each file system
D.A sub-domain for each hardware platform

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Question No : 2

According to EMC best practices, what is recommended when planning for an EMC Avamar client deployment?

A.Maximum of 5 million to 10 million files per client
B.Maximum of 5 TB of database data per client
C.Maximum of 10 TB of file system data per client
D.Maximum of 500 GB of database data per client

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Question No : 3

According to EMC best practices, what is the maximum percentage of physical RAM that should be allocated for the hash and file caches combined?

A.15
B.25
C.30
D.40

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Question No : 4

What is an advantage of performing VMware Image Level backups with EMC Avamar?

A.Backups can occur while virtual machines are powered on or off
B.Virtual machines are backed up like any other physical machine
C.Highest level of data deduplication is provided
D.Database plug-ins are supported for backups and restores

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Question No : 5

What is a characteristic of EMC Avamar VMware Image Level backups?

A.Change Block Tracking option can be used to shorten backup times 36
B.Avamar client software is installed on each VMware virtual machine
C.File-level restores are supported for all client operating systems
D.Image proxy must be located on a different ESX server from the ESX server hosting the target machines

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Question No : 6

What is an EMC Avamar best practice when performing an Microsoft Exchange 2003 Message Level restore of an individual message?

A.Restore to a temporary dedicated folder
B.Restore to the same folder
C.Restore to another Exchange database
D.Restore to a new temporary Exchange database

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Question No : 7

Based on EMC best practices, what is recommended when creating Avamar schedules?

A.Use a single schedule where possible
B.Use a different schedule for each group
C.Use multiple schedules to ensure backup jobs do not overlap
D.Use a separate schedule for each client

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Question No : 8

When a backup is initiated by the EMC Avamar client application, how is the retention determined?

A.End User On-Demand Retention policy
B.Retention policy of the default group
C.Retention policy of the clients group
D.Retention policy for the domain

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Question No : 9

A company has an EMC Celerra volume with 40 million files. They want to back up the entire volume using a single EMC Avamar accelerator.
According to best practices, what is the minimum number of backup streams that should be used?

A.1
B.2
C.4
D.5

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Explanation:

Question No : 10

In EMC Avamar, what is the purpose of the p_cache.dat file?

A.Determines if a chunk is already stored on the Avamar server
B.Determines if a file is already stored on the Avamar server
C.Stores storage node IP addresses
D.Sets backup flags and options

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Question No : 11

When sizing a large file server on an EMC Avamar, how many bytes per file are added to the file cache?

A.20
B.24
C.40
D.44

정답:
Explanation:
The most important thing to do on a client with so many files is to make sure that the file cache is sized appropriately. The file cache is responsible for the vast majority (>90%) of the performance of the Avamar client. If there's a file cache miss, the client has to go and thrash your disk for a while chunking up a file that may already be on the server.
So how to tune the file cache size?
The file cache starts at 22MB in size and doubles in size each time it grows. Each file on a client will use 44 bytes of space in the file cache (two SHA-1 hashes consuming 20 bytes each and 4 bytes of metadata). For 25 million files, the client will generate just over 1GB of cache data.
http://jslabonte.blogspot.com/2013/08/avamar-and-large-dataset-with-multiples.html

Question No : 12

When sizing a large database server on an EMC Avamar, how many bytes per entry are added to the hash cache?

A.20
B.24
C.40
D.44

정답:
Explanation:
The most important thing to do on a client with so many files is to make sure that the file cache is sized appropriately. The file cache is responsible for the vast majority (>90%) of the performance of the Avamar client. If there's a file cache miss, the client has to go and thrash your disk for a while chunking up a file that may already be on the server.
So how to tune the file cache size?
The file cache starts at 22MB in size and doubles in size each time it grows. Each file on a client will use 44 bytes of space in the file cache (two SHA-1 hashes consuming 20 bytes each and 4 bytes of metadata). For 25 million files, the client will generate just over 1GB of cache data.
http://jslabonte.blogspot.com/2013/08/avamar-and-large-dataset-with-multiples.html

Question No : 13

Due to a scheduling conflict, an EMC Avamar administrator had to cancel the backup of a client using the Avamar Administration GUI.
What happens to the backup data that had already been sent to the Avamar server?

A.Data is retained for seven days as a partial backup
B.Chunks from the incomplete backup will be removed at the next garbage collection
C.Data is retained for the remainder of the retention policy that was used for the backup
D.Data is tagged "corrupted" and will be marked recoverable at the next HFS check

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Question No : 14

On which cluster node(s) is the Avamar Windows File System client installed in a Microsoft Windows 2008 cluster?

A.All nodes
B.Only the active node
C.Only the passive nodes
D.None of the nodes

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Question No : 15

In which directory are the Avamar data server log files located in a multi-node Avamar server?

A./data01/cur on each storage node
B./sysinfo/log on the utility node
C./data01/cur on the utility node
D./var/log on each storage node

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EMC E20-598 시험