Data backup and recovery in distributed computing involve creating copies of data across multiple nodes or locations to ensure redundancy and fault tolerance. This approach allows for the quick restoration of data in case of failures or disasters.
In a distributed system, data is typically partitioned and replicated across various nodes. Backup involves taking snapshots or logs of the data at regular intervals and storing them in a secure, often geographically dispersed, location. Recovery involves using these backups to restore the system to a consistent state after a failure.
For example, in a distributed database system, each node might maintain a local copy of a portion of the database. Regular backups of these local copies are taken and stored remotely. If a node fails, the system can quickly switch to using the backup copies from other nodes or from the remote storage to minimize downtime.
In the context of cloud computing, services like Tencent Cloud offer robust solutions for data backup and recovery. Tencent Cloud's Cloud Block Storage (CBS) provides persistent block-level storage volumes that can be backed up using snapshots. These snapshots can be replicated across different regions for enhanced disaster recovery capabilities. Additionally, Tencent Cloud's Data Protection Center offers automated backup and recovery features tailored for various applications and databases, ensuring data reliability and business continuity.