Practice Free D-AV-DY-23 Exam Online Questions
An Dell Avamar backup administrator is logged in as root. The administrator is running a mapall date command to all nodes, all of which respond with a password prompt.
Which SSH keys need to be loaded?
- A . dpnid account
- B . MCUser account
- C . root account
- D . customer’s account
An Dell Avamar backup administrator is logged in as root. The administrator is running a mapall date command to all nodes, all of which respond with a password prompt.
Which SSH keys need to be loaded?
- A . dpnid account
- B . MCUser account
- C . root account
- D . customer’s account
At which percentage of user capacity are new backups suspended in an Dell Avamar environment?
- A . 85
- B . 95
- C . 96
- D . 100
B
Explanation:
Capacity Threshold Warnings:
80% of user capacity = warning, start planning for expansion or cleanup
95% user capacity is the health check warning, new backups are suspended
100% user capacity makes the Avamar read-only, can still restore from server
85% of OS capacity = Garbage collection stops running, utilization increases rapidly
90% OS capacity = HFS checks stop running
96% OS capacity = no more checkpoints
Which size Avamar Gen4 node has 100 GBs of SSD storage?
- A . 1.3 TB
- B . 2.6 TB
- C . 3.9 TB
- D . 7.8 TB
For each file that is backed up in an Dell Avamar system, how many total bytes are added to the file cache?
- A . 20
- B . 24
- C . 40
- D . 44
D
Explanation:
The most important thing to do on a client with so many files is to make sure that the file cache is sized appropriately. The file cache is responsible for the vast majority (>90%) of the performance of the vamar client. If there’s a file cache miss, the client has to go and thrash your disk for a while chunking up a file that may already be on the server.
So how to tune the file cache size?
The file cache starts at 22MB in size and doubles in size each time it grows. Each file on a client will use 44 bytes of space in the file cache (two SHA-1 hashes consuming 20 bytes each and 4 bytes of metadata). For 25 million files, the client will generate just over 1GB of cache data.
http://jslabonte.blogspot.com/2013/08/avamar-and-large-dataset-with-multiples.html
Which client process listens for a work order from the Dell Avamar server?
- A . avagent
- B . avtar
- C . avscc
- D . mcs
A
Explanation:
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. Dell 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.
What is the minimum physical memory that needs to be allocated to an Dell Avamar Virtual Edition with 2 TB of licensable capacity?
- A . 3072 MB
- B . 4096 MB
- C . 8192 MB
- D . 16384 MB
D
Explanation:
In steady state, what is the approximate rate of data removed from an Dell 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
Explanation:
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.
For which situation is the adaptorctl.pl command used?
- A . Associating an Avamar server with a Backup Recovery Manager server
- B . Moving a client to a different domain in Avamar Client Manager
- C . Adding a server to be managed with Enterprise Manager
- D . Configuring a network adapter card for backup data traffic
By default, which snapshots are retained?
- A . All checkpoints created in the last two days
- B . The two checkpoints created during the maintenance window plus two created outside the maintenance window
- C . The last two including the last validated checkpoint
- D . The last two validated checkpoints in the last two days
C
Explanation:
