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Let’s Do (Basics correct before DR discussion)

Hello Friends,

Production Services you might have heard one word Disaster recovery and we before going to DR we should understand few basic steps and then we will move towards DR.

Backup Strategy:

1)      Backup Method
2)      Backup Window
3)      Retention Period
4)      Recovery Method


What is RPO and RTO?

RPO: Recovery Point Objective
How much data you can afford to lose (Or how long it has been since you saved your data, the recovery point)

RTO: Recovery Time Objective 
It is the length of time you can afford to take to return to normal service.


Technologies can be used for RPO and RTO?

Recovery Point (RPO)
Tape Backups
Snapshot
Asynchronous replication
Synchronous replication


Recovery Time (RTO)
Bare Metal Restore
Disk Restore
Tape Restore


Role difference between Master Media and EMM?

Media Server: These servers had some form of storage attached either network storage, Physical storage or tape library. Media servers performs following tasks.
1)     Reading & writing  of data to and from Disk or Tape
2)     They combines clients data into GNU tar archive files called backup images.
Multiple Media Servers can be managed by one master server

Master Server:
Master server controls the backup and recovery activities for the client assigned to it.
Master server tracks which files is backup-ed using which media and media server by which backup policy.

Enterprise Media Manager:
Enterprise Master server is central data storage and number of services which manages and allocate resources for backup function its operation.
This is usually on the host as master server.


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