EMC E20-598 Online Practice Questions and Exam Preparation

EMC E20-598 Online Questions & Answers

• Question 11:

  On an EMC Avamar server, the maintenance schedule is enabled. If the server is over a certain capacity, when will the server automatically cancel backups that are running under the default configuration?

  A. At the start of the blackout window
  B. At the start of the maintenance window
  C. After the first checkpoint in the blackout window
  D. After the backup has fully completed
  A. At the start of the blackout window

• Question 12:

  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
  B. The backup is deleted from the Data Domain system

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  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 13:

  A customer manually runs a backup job with a retention time of 60 days. After the backup completes, they notice that the retention tag was set to "N".

  Why?

  A. End User on Demand Retention was set to "no end date"
  B. The default retention of the default group was set to "N"
  C. On-demand backups are always assigned a retention tag of "N"
  D. On-demand backups do not use retention times
  C. On-demand backups are always assigned a retention tag of "N"

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  There are several way to set flags for on-deman backups. Server Side backup:

  1.

  "Backup and Restore" View, Can specify through "advanced"

  2.

  "Policy" View, "Backup Up Group Now", Defined flags for group

  3.

  "Policy" View, "Backup Up Client Now", Defind flags for selected group Client Side Backup:

  1.

  Avtar command line mode, user can specify flags

  2.

  GUI, can not specify. N flag. https://community.emc.com/thread/99800

• Question 14:

  

  What is the smallest supported RAIN configuration for EMC Avamar?

  A. 1 utility node, 0 spare nodes, 3 storage nodes
  B. 1 utility node, 0 spare nodes, 1 storage node
  C. 1 utility node, 1 spare node, 4 storage nodes
  D. 1 utility node, 1 spare node, 2 storage nodes
  A. 1 utility node, 0 spare nodes, 3 storage nodes

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  Also known as the Non-RAIN (Redundant Array of Independent Nodes) configuration. This is the entry level configuration in which the single node acts as the utility node and the data storage node. When using this configuration 2 single

  nodes are needed. 1 is the main backup node, and the 2nd is used for replication purposes for fault tolerance. Used in small to medium sized environments.

  Muti-Node Non RAIN.

  This is basically is a 3 node setup consisting of 1 Utility Node and 2 Data Storage Nodes. It allows for double the storage capacity of a Single Node device. This configuration also needs a duplicate setup for replication, so a total of 6 Nodes

  would be needed for fault tolerance. Used in medium sized environments.

  Multi-Node RAIN.

  The Standard RAIN configuration has 1 Utility Node, 4 Data Storage Nodes and 1 Spare Node. This configuration can be expanded for a total of 16 Data Storage Nodes max. All of the nodes work together to balance the storage equally

  across all of the other Data Storage Nodes. This architecture is easily scaled by adding as many Storage nodes as necessary. Typically used in large environments, this configuration can be initially setup with 3 Storage nodes instead of the

  standard 4 Storage nodes. It is recommended to setup a duplicate Multi-Node RAIN for replication, typically at a DR site. Although it is recommended, it is not a necessity like the Non-RAIN configurations, because there is a spare node that

  can be configured at any point for fault tolerance.

• Question 15:

  Starting at the bottom, what is the recommended order for racking components in a Gen4 EMC Avamar Data Store rack without premium support?

  A. Utility, spare, storage, switches
  B. Switches, utility, storage, spare
  C. Switch A, utility, spare, storage, Switch B
  D. Switch A, spare, storage, utility, Switch B
  A. Utility, spare, storage, switches

• Question 16:

  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
  A. avagent.log

• Question 17:

  In steady state, what is the approximate rate of data removed from an EMC 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
  A. 10 GB per hour per node

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  http://gregandthenetwork.blogspot.com/2013/12/design-imapact-of-avamar-system.html Garbage Collection is the single most important process to ensure a consistent state of the Avamar. If garbage collection is running, the system is in a read-only state and no other maintenance or backup can run. Coincidentally, if backup is still running, garbage collection will not begin. Garbage collection can free up about 10GB/node/hour once the Avamar is in a steady state, but this will take longer as utilization of the Avamar grows.

• Question 18:

  When accessing the utility node using a bash shell (putty) session as `admin', you receive a message referencing a possible Man-In-The-Middle attack stating:

  "REMOTE HOST IDENTIFICATION HAS CHANGED!"

  How do you repair this condition?

  A. Remove the IP address in question from /home/admin/.ssh/known_hosts
  B. Remove the IP address in question from /root/.ssh/known_hosts
  C. Remove "admin" from /etc/passwd on the utility node
  D. Remove "admin_key" key from /home/admin/.ssh
  A. Remove the IP address in question from /home/admin/.ssh/known_hosts

• Question 19:

  A storage administrator wants to migrate from a single-node EMC Avamar server to a Avamar multi-node server. Which method of replication should be used?

  A. Root-to-root
  B. Root-to-replicate
  C. Selective
  D. Normal
  A. Root-to-root

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• Question 20:

  A company is using an EMC Avamar multi-node server with 2 TB storage nodes. The company wants to add 3 TB of Avamar storage to the multi-node server. How can this be achieved?

  A. Add one 3.3 TB storage node
  B. Add two 2 TB AVEs
  C. Add two 2 TB storage nodes
  D. Add three 1 TB storage nodes
  C. Add two 2 TB storage nodes

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