EMC EMC Certifications E20-598 Questions & Answers

• Question 61:

  An organization is looking for EMC AVE as a backup solution for their remote site. They have two file servers with a daily change rate of 2 GB. They have three SQL servers with a daily change rate of 7 GB.

  Which AVE capacity edition should they use, assuming typical retention?

  A. 0.5 TB

  B. 1.0 TB

  C. 2.0 TB

  D. 4.0 TB

  Correct Answer: B

  

• Question 62:

  During EMC Avamar garbage collection, which backups are candidates for deletion?

  A. Backups that failed HFS check

  B. Backups that were replicated to Data Domain

  C. Backups of clients that have been retired

  D. Partial backups older than seven days

  Correct Answer: D

  For initial backup of Avamar clients, it's best to start with a small number of clients to produce a dataset from which commonality will be generated. This will increase the backup speed of following clients. On a new Avamar system, consider enabling overtime because all the data is new and there won't be much maintenance to take place. Never enable overtime on an existing Avamar, rather configure the use of partial backups to be saved. Partial backups are saved for 7 days and are not deleted by the garbage collection process. When an unfinished job ends before completing and partial backups are enabled, the backup job will continue from the last known state and will complete faster. http://gregandthenetwork.blogspot.com/2013/12/avamar-configuration-design-best.html https://communities.vmware.com/message/2166196

• Question 63:

  What is the maximum number of 1.0 TB EMC AVE servers that can be installed on a single ESX server?

  A. 1

  B. 2

  C. 3

  D. 4

  Correct Answer: B

  

• Question 64:

  A company has just deployed a VMware environment. The EMC Avamar storage administrator wants to ensure they receive the highest level of de-duplication within the environment for backups of certain clients. Which type of backup should be performed for those clients?

  A. ESX Console

  B. Guest

  C. vSphere Image

  D. VCB Image

  Correct Answer: B

  

  

• Question 65:

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

  A. Avamar client software installation

  B. Avamar Administrator Policy window

  C. Windows File System plug-in options

  D. Avamar Windows Client Options menu

  Correct Answer: A

• Question 66:

  An EMC Avamar backup client is backing up the Windows file system and SQL database using the same dataset for their backup policy. What backup behavior is expected to occur?

  A. One backup is created, then executed

  B. Two backups are created, then run one at a time

  C. Two backups are created, then run simultaneously

  D. Backup will fail; a backup group must be created for each backup type

  Correct Answer: B

• Question 67:

  What is the physical memory requirement for an EMC AVE with 1 TB capacity?

  A. 6 GB

  B. 8 GB

  C. 16 GB

  D. 32 GB

  Correct Answer: B

  AVE 7

  

  AVE 6

  

• Question 68:

  An EMC Avamar server is integrated with an EMC Data Domain system. A backup has expired on the Avamar server and garbage collection runs.

  What is the impact to the backup stored on the Data Domain system?

  A. The backup is deleted based on Data Domain retention policies

  B. The backup is deleted from the Data Domain system

  C. HFS check is run on the backup on the Data Domain

  D. The backup is immediately replicated to another Data Domain

  Correct Answer: B

  Server maintenance activity monitoring Avamar performs the system maintenance operations for backup data on the Data Domain system, including HFS checks, checkpoints, rollbacks, garbage collection, and secure backup deletion. The ddmaint utility implements all required operations on the Data Domain system for the Avamar server. The ddrmaint utility is installed on the utility node of a multi-node server, or the single node of a single-node server, during Avamar server installation. The ddrmaint utility is not installed on the data nodes of the Avamar server. The ddrmaint utility logs all maintenance activities on the Avamar server in the ddrmaint.log file. The following directory on either the utility node of a multi-node server or the single node of a single-node server contains the log file: /usr/local/avamar/var/ddrmaintlogs/ddrmaint.log The ddrmaint.log file is rotated when it reaches 25 MB in size.

• Question 69:

  What happens when files fail to find a match in the file cache during a backup of an EMC Avamar client computer?

  A. An "is present" call to the Avamar server

  B. Fewer chunks are compressed

  C. More files are processed for backup

  D. Increased memory swapping

  Correct Answer: C

• Question 70:

  During a backup, which EMC Avamar server process communicates with the avtar process on the client?

  A. EMS

  B. MCS

  C. GSAN

  D. avagent

  Correct Answer: C

  

  Are next type of node is the Storage Node, which run a process called gsan. This service communicates with the avtar command on the individual backup clients. Avtar communicates with a storage nodes gsan process, then that storage node spreads the data across the available data nodes. Avamar Node Types and Processes There are several different types of Nodes within an Avamar Server. The Utility node is the identity of the Avamar Server and provides the bulk of the internal Avamar server processes such as: Avamar Administrator (used to manage the Avamar Server from a gui), cron jobs, DNS, NTP, external authentication, web access, MCS and EMS. MCS (Management Console Server) provides centralized management including scheduling of backups, restore of backups, monitoring and reporting. EMS (Enterprise Manager Server) provides web based management for multiple Avamar Servers as well as monitoring and configuration for Avamar Replication. Web Access provides access to documentation, backup plug-ins as well as remote File System restore access to end users. Are next type of node is the Storage Node, which run a process called gsan. This service communicates with the avtar command on the individual backup clients. Avtar communicates with a storage nodes gsan process, then that storage node spreads the data across the available data nodes. A Spare Node is an active node that is present in a multi-node RAIN (Redundant Array of Independent Nodes) grid. The interesting thing about the Spare Node is that it is NOT a hot spare. There is a procedure in place that needs to be followed when a failed Storage Node occurs. In fact, the Avamar Server doesn't even care if the Spare Node is powered on, so if you are a "Green" conscience company, feel free to leave the Spare Node powered down. EMC Best Practice is to leave the Spare Node up and active though. Avamar Backups clients can be installed with 2 different types of client plug-ins: File System and Databases. The Avamar client uses 2 processes in the backup and restore process: Avtar and Avagent. The Avagent process listens for backup/restore work orders from the MCS service on the Utility Node using port 28002 and executes the avtar command that handles the backup/restore processes and communicates with the gsan service on the storage nodes. This process is depicted in the included picture above. Lastly, in a previous blog, I discussed the 2 different licensable options for Avamar and how the disks are comprised in each Storage Nodes type. These are depicted in the picture above as well as a breakdown of how the disks are structured. http://whughgriffin.wordpress.com/2009/06/03/avamar-system-overview/