E20-598 Latest Exam Braindumps
Question 8: During a backup, which EMC Avamar server process communicates with the avtar process onthe client?
A. EMS
B. MCS
C. GSAN
D. avagent
Correct Answer: C
Explanation:
Are next type of node is theStorage 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 tomanage 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
accessto 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 communicateswith 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 hotspare.
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 isto 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 isdepicted 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 howthe disks are structured.
http://whughgriffin.wordpress.com/2009/06/03/avamar-system-overview/
