EMC E20-598 Online Practice Questions and Exam Preparation

EMC E20-598 Online Questions & Answers

• Question 181:

  Under which node replacement option do you need to generate a new EMC Avamar license key?

  A. When swapping disks from a failed utility node to a new node
  B. When performing a rebuild on an existing utility node
  C. When performing a rebuild on an existing storage node
  D. When swapping disks from a failed storage node to a new node
  A. When swapping disks from a failed utility node to a new node

• Question 182:

  Which basic network settings are required when configuring an EMC Avamar node at installation?

  A. IP address, DNS parameters, subnet, hostname and domain, gateway
  B. IP address, SMTP server, subnet, hostname and domain, gateway
  C. IP address, DNS parameters, duplex, hostname and domain, gateway
  D. IP address, DNS parameters, subnet, MTU size, gateway 54
  A. IP address, DNS parameters, subnet, hostname and domain, gateway

• Question 183:

  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
  C. More files are processed for backup

• Question 184:

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

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

• Question 185:

  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
  A. Traverses each directory in the backup dataset

• Question 186:

  Which port is used by EMC Avamar for Management Console Database access?

  A. 5555
  B. 7778
  C. 7781
  D. 8443
  A. 5555

  ---

  

• Question 187:

  Which type of data can be restored by a user with EMC Avamar Desktop/Laptop (DTLT)?

  A. Only data owned by the user
  B. Any data backed up from the client
  C. All data stored on the Avamar server
  D. All data belonging to clients in the same Avamar domain
  A. Only data owned by the user

• Question 188:

  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. /data01/cur
  A. /usr/local/avamar/var/mc/server_log

• Question 189:

  

  A Microsoft Windows user is about to start an on-demand backup using avtar when the utility node fails on their multi-node EMC Avamar server. What must be done to ensure the backup will run and complete successfully?

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

  ---

  

  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. Please stop back by later, I plan to talk about the NDMP Accelerator and it's role in the Avamar System.

• Question 190:

  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
  D. 5

  ---

  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.