AZ-104 Certification Notes

Chapter 8.6 - Replication Data Redundancy

Replication and Data Redundancy

When you create a Storage Account, you need to choose a Replication Type. Replication stores multiple copies of your data so that it's protected from:

• Planned events
• Transient hardware failures
• Network or power outages
• Massive natural disasters

The greater level of redundancy the more expensive the cost of replication:

• Primary Region Redundancy
  • Locally Redundant Storage (LRS)
  • Zone-redundant storage (ZRS)
• Secondary Region Redundancy
  • Geo redundant storage (GRS)
  • Geo-zone-redundant storage (GZRS)
• Second Region Redundancy with Read Access
  • Read-access geo-redundant storage (RA-GRS)
  • Read-access geo-redundant storage (RA-GZRS)

Practice Quiz

• Which Replication Type includes Locally Redundant Storage (LRS) and Zone-redundant storage (ZRS)?

  • Tertiary Region Redundancy
  • Primary Region Redundancy
  • Secondary Region Redundancy
  • Secondary Region Redundancy with Read Access

• Which Replication Type includes Read Replicas?

  • Zero Region Redundancy
  • Secondary Region Redundancy with Read Access
  • Primary Region Redundancy
  • Secondary Region Redundancy

• What is Replication?

  • Replication stores multiple copies of your data so that it is protected from planned events, transient hardware failures, network or power outages, and massive natural disasters.

• What is defined as the storing of the same data in multiple locations? E.g. Storing the same data on multiple data centers

  • Data Redundancy