EMC EMC Certifications E20-598 Questions & Answers

• Question 201:

  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 repl_cron.cfg is changed to exclude only the development servers, what will be replicated?

  A. Production clients, MC_Backups, and EM_Backups only

  B. Production clients only

  C. Production clients and MC_Backups only

  D. Production clients, MC_Backups, EM_Backups, and checkpoints

  Correct Answer: A

• Question 202:

  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

  Correct Answer: A

  

  

• Question 203:

  Which functionality is only available with EMC Avamar selective replication?

  A. Replication of selected clients

  B. Replication of selected datasets of selected clients

  C. Replication to selected destinations

  D. Replication on selected days of the week

  Correct Answer: A

• Question 204:

  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

  Correct Answer: A

• Question 205:

  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

  Correct Answer: A

• Question 206:

  Based on the configuration represented in the exhibit, which type(s) of EMC Avamar replication can be used?

  

  A. Normal

  B. Full copy

  C. Root-to-root

  D. Normal and root-to-root

  Correct Answer: A

• Question 207:

  Which feature is available through the Avamar Enterprise Manager, but not available through the Administrator console?

  A. Configuring selective replication

  B. Generating reports

  C. Viewing policy information

  D. Viewing system status information

  Correct Answer: A

• Question 208:

  In EMC Avamar, what is a variable-size unit of deduplicated data?

  A. Chunk

  B. Stripe

  C. Hash

  D. Block

  Correct Answer: A

  

• Question 209:

  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

  Correct Answer: D

  Single Node.

  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 210:

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

  A. avagent

  B. avtar

  C. avscc

  D. mcs

  Correct Answer: A

  

  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.