Disaster Recovery
Disaster recovery (DR) is the set of policies, tools, and procedures organizations use to restore IT systems, data, and operations after a disruptive event such as a hardware failure, cyberattack, or natural disaster.
22 resources across 2 libraries
Glossary Terms(4)
Block Storage
Block storage is a data storage architecture that splits data into fixed-size blocks, each addressed independently, and presents the result to a server as a ra…
Cold Storage
Cold storage is a class of data storage optimized for data that is accessed rarely, trading slower retrieval times and lower per-request performance for signif…
Disaster Recovery
Disaster recovery (DR) is the set of policies, tools, and procedures organizations use to restore IT systems, data, and operations after a disruptive event suc…
Colocation Hosting
Colocation hosting is an arrangement where a customer owns their physical server hardware but rents rack space, power, cooling, and network connectivity for it…
Interview Questions(18)
What is Database Replication?
Database replication is the process of continuously copying data from one database server (the primary) to one or more other servers (replicas), so multiple co…
Full vs Incremental Database Backups: What is the Difference?
A full backup copies every byte of the database at a point in time, while an incremental backup copies only the data that changed since the last backup of any…
What is Point-in-Time Recovery (PITR)?
Point-in-time recovery restores a database to its exact state at a specific past moment by combining a full backup with the replay of transaction logs up to th…
Why is Restore Testing Important for Database Backups?
Restore testing is the practice of regularly restoring a backup to a separate environment and verifying the data is complete and usable, because a backup that…
What are RPO and RTO in Database Disaster Recovery?
RPO (Recovery Point Objective) is the maximum acceptable amount of data loss measured in time, such as losing at most 15 minutes of writes, while RTO (Recovery…
Hot Backup vs Cold Backup: What is the Difference?
A hot backup is taken while the database stays online and serving reads and writes, using transaction-consistent snapshots or log coordination, whereas a cold…
What is Transaction Log Shipping and How is it Used?
Transaction log shipping is a high-availability technique where the write-ahead or transaction log records generated on a primary database are continuously cop…
What is Data Deduplication in Storage Systems?
Data deduplication is a storage technique that identifies duplicate chunks of data — whole files, fixed-size blocks, or variable-length content-defined chunks…
What Are Database Failover Mechanisms and How Do They Work?
Database failover is the mechanism by which a standby or replica database automatically (or manually) takes over as the primary when the original primary becom…
Automatic Failover vs Manual Failover: What Is the Difference?
Automatic failover lets a monitoring system detect a primary database failure and promote a replica without any human decision, while manual failover requires…
What Is Chaos Engineering for Databases and Why Practice It?
Chaos engineering for databases is the practice of deliberately injecting controlled failures, like killing the primary, introducing replication lag, or partit…
What is a Single Point of Failure (SPOF)?
A single point of failure (SPOF) is any component in a system whose failure alone causes the entire system, or a critical part of it, to become unavailable, an…
How Do You Design a Disaster Recovery Plan?
A disaster recovery plan is designed by first setting two business-driven targets — Recovery Time Objective (RTO, how fast you must be back up) and Recovery Po…
Active-Active vs Active-Passive: What is the Difference?
Active-active means two or more nodes simultaneously serve live traffic and share the load, while active-passive means only one node serves traffic at a time a…
What Are Geo-Replication Strategies?
Geo-replication is the practice of copying data across data centers in different geographic regions, so reads and writes can be served locally near users while…
What is Active-Passive Failover?
Active-passive failover is a reliability pattern where one instance (the active node) handles all live traffic while one or more standby instances (passive nod…
What Is Disaster Recovery and How Do RTO/RPO Work?
Disaster recovery (DR) is the set of policies, tools, and procedures that let an organization restore critical systems and data after a catastrophic failure —…
What Backup Strategies Would You Use in Production?
A production backup strategy combines full, incremental, and differential backups on a schedule driven by Recovery Point Objective (RPO) and Recovery Time Obje…