Deck 9: Backup and Recovery - Avamar Specialist for Implementation Engineers

Question 1

The EMC Avamar backup administrator is starting an ad-hoc backup using the Avamar Administrator interface. However, you notice that avtar is not starting on the client. Where is the first place you should look to begin troubleshooting?

A) avagent.log
B) err.log
C) avtar.log
D) avscc.log

Answer 1

avagent.log

Question 2

You are performing an ad-hoc backup from a Windows client. Which log file would you use to investigate communication issues between the Avamar client and the Avamar server utility node?

A) avagent.log
B) COD-workorder-Windows.log
C) MOD-workorder-Windows.log
D) err.log

Answer 2

avagent.log

Question 3

What does an HFS check do?

A) Performs server checkpoint rollbacks
B) Performs a snapshot of an Avamar server
C) Validates the integrity of a checkpoint
D) Checks for RAID controller errors

Answer 3

Validates the integrity of a checkpoint

Question 4

A customer is currently running a 1 x 2 Avamar server with 1 TB nodes. In order to add new clients to their Avamar environment, the customer needs more capacity. How can this be achieved?

A) Add one, 2 TB node to the 1 x 2 infrastructure with RAIN enabled
B) Add one, 1 TB node to the existing Avamar server with RAIN enabled
C) Upgrade the current Avamar 1 TB license to a 2 TB license
D) Migrate the backup data to a new 1 x 4 server using root-to-root replication

Question 5

What does an EMC Avamar Accelerator node provide?

A) Backup and recovery functionality for NAS storage devices
B) Ability to offload processing from a Utility node
C) Ability to offload processing from a Storage node
D) Enhanced access to the Avamar File System

Question 6

In what type of file is backup data stored in an EMC Avamar storage node?

A) Chunks
B) Hash
C) Stripes
D) Index

Question 7

What would be an appropriate reason to deploy an EMC Avamar database accelerator?

A) Reduces CPU utilization
B) Required for NDMP and RMAN backups
C) Increases network throughput
D) Reduces the recovery time

Question 8

Which is the minimum version of ESX Server required for a single-step restore of a Windows file from a VM Image level backup using EMC Avamar?

A) 3.0
B) 3.2
C) 3.5
D) 4.0

Question 9

By default, what does the asktime utility do when executed on the utility node?

A) Configures the current time on the utility node and on all storage nodes
B) Reports the NTP server's current time
C) Reports the time on the execution node
D) Configures the current time on the execution node only

Question 10

An EMC Avamar customer wants to run garbage collection outside the blackout window. What may prevent the garbage collection job from starting?

A) Restores are running.
B) System is running in degraded mode.
C) HFS check is running.
D) There is no garbage to collect.

Question 11

During an EMC Avamar server garbage collect maintenance activity, which backups are candidates for collection?

A) Backups that have been retired
B) Partial backups older than seven days
C) Backups performed manually
D) Root-to-root replicated backups

Question 12

In which directory are the EMC Avamar administrator logs located?

A) /usr/local/avamar/var/mc/server_log
B) /usr/local/avamar/var/log
C) /usr/local/avamar/etc
D) /tmp

Question 13

You have completed a file transfer of the EMC Avamar software tar file to the Avamar server. What would you use to verify that the contents of the EMC Avamar software tar file are not corrupt?

A) md5sum
B) sftp
C) winscp
D) tar

Question 14

You are performing an installation of the EMC Avamar software when you encounter the message "Error: You must place a valid Avamar license key in /usr/local/avamar/etc/license.xml ...". What is the relevance of this message?

A) You may fully use the system until the licensing grace period expires.
B) You will not be able to use the system at all.
C) You will be able to write backup data to the system, but not retrieve that data.
D) You may fully use the system, but for a limited amount of backup data only.

Question 15

What is the recommended replication method for moving all data and clients from a single node to a multinode EMC Avamar server?

A) /REPLICATE replication
B) Selective replication
C) Root-to-root replication
D) Normal replication

Question 16

In which format will a Windows file be restored when using the EMC Avamar client Web interface?

A) uncompressed
B) RAR
C) tagged
D) zip

Question 17

You have correctly executed the EMC Avamar network definition utility and rebooted all of the nodes in your Avamar server. To check that the nodes have been defined correctly, you execute the command  mapall --all --user=root date. Which nodes should respond by displaying the output of the command?

A) Utility node, active data nodes, and spare node
B) Utility node and active data nodes only
C) Active data nodes and spare node only
D) Active data nodes only

Question 18

Which field within the DPN Summary report indicates how much data has been transferred to the EMC Avamar server?

A) TotalBytes
B) ModReduced
C) Overhead
D) ModSent

Question 19

Which EMC Avamar utility is used to configure a multinode server within a NAT environment?

A) netconfig
B) ifconfig
C) avmaint
D) dpnnetutil

Question 20

What is the name of the default administration account in EMC Avamar Administrator?

A) Administrator
B) MCUser
C) dpn
D) admin

Question 21

The EMC Avamar client needs to backup a file and has performed sticky-byte factoring. This results in the following: Seven (7) chunks that will compress at 30% Four (4) that will compress at 23% Two (2) chunks at 50% compression How many chunks will be compressed prior to hashing?

A) 4
B) 7
C) 9
D) 13

Question 22

Starting at the bottom, what is the recommended order for racking components in an EMC Avamar Data Store rack?

A) Switch, utility, spare, storage
B) Switch, utility, storage, spare
C) Storage, switch, utility, spare
D) Spare, storage, switch, utility

Question 23

Which hash type represents an individual data chunk processed during an EMC Avamar backup?

A) Atomic
B) Root
C) Composite
D) Metadata

Question 24

Which command is used to configure basic networking on an EMC Avamar node?

A) dpnnetutil
B) ifconfig
C) netconfig
D) netstat

Question 25

Which command do you use to end all client activities when adding an EMC Avamar storage node?

A) dpnctl stop mcs
B) avmaint config -ava
C) avmaint suspend
D) dpnctl stop ems

Question 26

What is the benchmark duration for EMC AVE?

A) 1 hour
B) 8 hours
C) 12 hours
D) 24 hours

Question 27

Which time zone is used on EMC Avamar nodes?

A) Local time on the utility node; GMT/UTC on the storage nodes
B) GMT/UTC on the utility node; local time on the storage nodes
C) All node types use the local time
D) All nodes use GMT/UTC time

Question 28

What is the default passphrase when adding the admin ssh keys?

A) changeme
B) calvin
C) MCUser1
D) P3t3rPan

Question 29

What is the result of specifying only one NTP server during an EMC Avamar server software installation?

A) The utility node will be used as the secondary time source.
B) The installation will raise an error and fail.
C) Only one time source will be used.
D) A time source will be automatically selected.

Question 30

What is the path for the EMC AVE avqinstall.log file?

A) /usr/local/avamar/var/log
B) /usr/local/avamar/etc/log
C) /data01/cur
D) /tmp

Question 31

What is the purpose of NIC bonding in EMC Avamar?

A) Failover
B) Bandwidth
C) Latency
D) Dell DRAC

Question 32

Which Avamar utility modifies the operating system networking files on an Avamar utility node?

A) dpnnetutil
B) node.cfg
C) nodenumbers
D) dpnutils

Question 33

Which RAID level is used in an EMC Avamar 2 TB single-node server?

A) 0
B) 1
C) 3
D) 5

Question 34

How many simultaneous client connections per node will an EMC Avamar server support?

A) 10
B) 15
C) 18
D) 25

Question 35

Where do you copy the Avamar software tar file to for an AVE install?

A) ESX Server
B) Virtual machine
C) Virtual Center
D) Dedicated Avamar node

Question 36

You need to install a multinode EMC Avamar server. To which node(s) should you copy the Avamar software file?

A) Utility node and active data nodes
B) Utility node only
C) Utility node, active data nodes, and spare node
D) Active data nodes only

Question 37

What are three types of EMC Avamar hashes?

A) Composite, Root, and Atomic
B) Root, Atomic, and Index
C) Composite, Atomic, and Stripe
D) Root, Atomic, and Parity

Question 38

Which port on the Avamar server does the client connect to when performing a backup with encryption enabled?

A) 27000
B) 28001
C) 28002
D) 29000

Question 39

Which stripes are candidates for balancing when performing EMC Avamar server dynamic load balancing with the avmaint config balancemin=1 command?

A) Only composite stripes
B) Only data stripes
C) All stripes
D) Only index stripes

Question 40

For each file that is backed up in an EMC Avamar system, how many total bytes are added to the file cache?

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

Question 41

At which percentage of user capacity are new backups suspended in an EMC Avamar environment?

A) 85
B) 95
C) 96
D) 100

Question 42

How much RAM is required for an EMC Avamar Gen4 utility node?

A) 4 GB
B) 8 GB
C) 12 GB
D) 24 GB

Question 43

Which processes are started automatically during an EMC Avamar Windows client installation?

A) avagent and avscc only
B) avtar and avagent only
C) avtar, avagent, and avscc
D) avscc and avtar only

Question 44

What is the first process performed by avatar when running an EMC Avamar backup?

A) Traverses each directory in the backup dataset
B) Checks the client's file cache
C) Runs sticky-byte factoring
D) Writes to the hash cache file

Question 45

By default, which port is required to be open on the firewall for client communications with the EMC Avamar utility node?

A) 7778
B) 27000
C) 28001
D) 29000

Question 46

In steady state, what is the approximate rate of data removed from an Avamar grid during a daily garbage collection?

A) 10 GB per hour per node
B) 10 GB per hour per grid
C) 100 GB per hour per node
D) 100 GB per hour per grid

Question 47

An EMC Avamar storage administrator has 400 Microsoft Windows clients; 350 are production and 50 are development. The administrator wants to replicate only the production servers. If Enterprise Manager is used to only include the production servers, what will be replicated?

A) Clients
B) Clients and MC_Backups
C) Clients, MC_Backups, and EM_Backups
D) Clients, MC_Backups, EM_Backups, and checkpoints

Question 48

Which EMC Avamar replication mode allows for many-to-one and bi-directional replication?

A) Normal
B) Failover
C) Root-to-root
D) Selective root-to-root

Question 49

A customer is unable to connect to their EMC Avamar server when using the Avamar Administrator GUI. If default settings are being used, which port must be open for a successful connection?

A) 5555
B) 7778
C) 8443
D) 8080

Question 50

Which EMC Avamar Management Console navigation screen can be used to check when the last checkpoint and checkpoint validation occurred?

A) Server
B) Activity
C) Administration
D) Policy

Question 51

A storage administrator is using the Avamar Administrator console to configure replication. What is the default password for the "repluser" account?

A) 9RttoTriz
B) 8RttoTriz
C) changeme
D) P3t3rPan

Question 52

An EMC Avamar customer, without premium support, has a requirement to be able to recover from a failed storage node. What is the minimum amount of nodes, of all types, that is required to support this functionality?

A) 1
B) 2
C) 3
D) 5

Question 53

At which percentage of user capacity will EMC Avamar issue the first warning?

A) 70
B) 80
C) 85
D) 65

Question 54

Which user account and default password should be used when configuring an additional EMC Avamar server in Enterprise Manager?

A) MCUser / MCUser1
B) Avamar internal root / 8RttoTriz
C) O/S root / changeme
D) O/S admin / changeme

Question 55

Which interface is used to start Avamar Client Manager?

A) Enterprise Manager
B) Command Line
C) cron job
D) Avamar Administrator

Question 56

On an EMC Avamar server, what is the file extension of stripes that contain backup chunks?

A) *.dat
B) *.usd
C) *.chd
D) *.cdt

Question 57

At which percentage of the O/S capacity does garbage collection stop running in an EMC Avamar environment?

A) 85
B) 90
C) 96
D) 100

Question 58

Which client process listens for a work order from the EMC Avamar server?

A) avagent
B) avtar
C) avscc
D) mcs

Question 59

Where are replication log files stored on an EMC Avamar server?

A) /usr/local/avamar/var/cron/replicate.log
B) /usr/local/avamar/var/log/replicate.log
C) /usr/local/avamar/var/cron/log/replicate.log
D) /usr/local/avamar/log/replicate.log

Question 60

What is the behavior of an EMC Avamar HFS check when it detects an error in a stripe?

A) Attempts stripe repair
B) Aborts checking and restarts
C) Completes with exceptions
D) Stops the GSAN

Question 61

By default, what does the Avamar Email Home profile send?

A) Status of the daily integrity check
B) Avamar alerts once daily
C) Reports once daily
D) Avamar alerts as they occur

Question 62

The exhibit shows a portion of a DPN Summary report. Which field on the report indicates how much data has been transferred to the EMC Avamar server?

A) ModSent
B) TotalBytes
C) ModReduced
D) PcntCommon

Question 63

A Microsoft Windows user is about to initiate an on-demand backup from the client interface when the utility node fails on their multi-node EMC Avamar grid. What must be done prior to initiating the backup to ensure the backup will complete successfully?

A) Nothing. Backups are performed from the client to the storage nodes directly.
B) The utility node must be replaced and the configuration restored prior to starting the backup.
C) The spare node must be converted to a utility node and the configuration restored to it prior to starting the backup.
D) The client must be activated temporarily to the first storage node and then the backup can continue.

Question 64

A storage administrator has successfully configured EMC Avamar to use Microsoft Windows Active Directory external authentication. Which accounts and/or interfaces can be accessed by users set up to use this authentication?

A) Avamar Administrator, Enterprise Manager, and Web Access
B) MCUser, admin, and Enterprise Manager
C) Avamar Administrator, root, and dpn
D) MCUser, Web Access, and root

Question 65

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

Question 66

An EMC Avamar customer is analyzing the DPN Summary report shown in the exhibit. What does the field "TotalBytes" represent?

A) Number of bytes examined during the backup
B) Number of bytes from modified files not sent due to commonality
C) Total bytes reduced due to compression
D) Total bytes sent to the server during the backup

Question 67

A company wants to compare the amount of Avamar storage that a Microsoft Windows file server client consumes with that of a UNIX DB2 server. Which tool can be used to determine the amount of Avamar storage used by a particular client?

A) Avamar Administrator => Backend Capacity Report
B) Avamar Administrator => Group Status Summary
C) Command Line Utility => capacity.sh
D) Enterprise Manager => Capacity Usage Report

Question 68

What is a potential impact of having an undersized hash cache on an EMC Avamar client?

A) More queries to the Avamar server
B) Decreased memory swapping
C) More backup data sent to the Avamar server
D) More chunks are compressed

Question 69

According to EMC Avamar best practices, what is the maximum ratio of database data to file system data that should exist in an Avamar backup environment?

A) 10:90
B) 20:80
C) 30:70
D) 50:50

Question 70

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

Question 71

You are performing an ad-hoc backup from a Microsoft Windows client. Which log file would you use to investigate communication issues between the Avamar client and the Avamar server utility node?

A) avagent.log
B) COD-workorder-Windows.log
C) MOD-workorder-Windows.log
D) err.log

Question 72

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

Question 73

On an EMC Avamar Windows client host, what is the default location for the Avamar software?

A) C:\program files\avs
B) C:\program files\avamar
C) C:\avamar\avs
D) C:\avmrclnt

Question 74

Which factor(s) affect the capacity utilization in an EMC Avamar environment?

A) Total amount of primary data being backed up
B) How often the backups are scheduled to run
C) Size of the grid and license amount
D) Whether HFS check succeeds every day

Question 75

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

Question 76

By default, what is a characteristic of Avamar ConnectEMC?

A) Sends Avamar alerts as they occur
B) Sends Avamar alerts twice daily
C) Sends reports twice daily
D) Sends reports as they are created

Question 77

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

Question 78

A storage administrator wants to determine if the EMC Avamar server is running in steady state. Which command/script must be run?

A) capacity.sh
B) status.dpn
C) dpnctl status
D) healthcheck.pl

Question 79

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

Question 80

A company has 50 clients backing up to an EMC Avamar server. The storage administrator has decided to enable desktop/laptop (DTLT) support for several of the Microsoft Windows client machines. Where is this support enabled?

A) Avamar client software installation
B) Avamar Windows Client Options menu
C) Avamar Administrator Policy window
D) Windows File System plug-in