Question 1

What's the difference between data redundancy and backups?

Accepted Answer

Data redundancy keeps multiple copies of the same data available at the same time (often automatically) so a failure doesn’t interrupt access. Backups are point-in-time copies kept separately so you can restore data after accidental deletion, corruption, ransomware, or a bad update. Redundancy helps with availability; backups help with recovery.

Question 2

When should I use data redundancy?

Accepted Answer

Use data redundancy when you need high availability and durability—such as customer-facing apps, critical databases, shared file storage, and compliance-sensitive data. Choose multi-zone or cross-region redundancy when downtime is expensive or when you need disaster recovery protection from a full data center outage.

Question 3

How much does data redundancy cost?

Accepted Answer

Cost depends on how many copies are kept and where they are stored. Multi-zone or cross-region redundancy typically costs more than single-zone because it uses more storage capacity and may add replication and data transfer charges. Object storage often prices redundancy through storage classes (for example, locally redundant vs geo-redundant options), while databases and block storage may charge for replicas, additional nodes, snapshots, and cross-region replication.

Data Redundancy

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