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📕 What is MVCC (Multi-version concurrency control)?

A method used to achieve both performant concurrent access and strict isolation level. The idea is to give each transaction a unique versioned view of the data, thus each transaction can operate on their own. Only at the commit phase, the database system will perform the resolution, the conflict might arise at this point and may cause the transaction to abort. However, the assumption is such scenario is less likely to happen and that's why MVCC is referred as optimistic concurrency control. A classic saying for MVCC is 'Reads do not block Writes, writes do not block Reads'.

Safer and faster database change and version control for DBAs and Developers

Bytebase is an open source, web-based database schema change and version control tool for teams. It offers a web-based collaboration workspace to help DBAs and Developers manage the lifecycle of application database schemas.

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SQL Review

A dedicated review workflow and UI for Developers and DBAs to collaborate on schema changes. Assisted by built-in advisor such as backward compatibility checks.


Integrate with VCS hosting the migration scripts. Migration pipeline is triggered on observing new script push event.

Streamlined Deployment

Support multi-tenant (M), multi-environment (N) schema change in a single M*N change matrix pipeline.

SQL Editor

Easy-to-use query interface to SELECT database records.

Migration History

Record the full migration history with side-by-side diff comparison between versions.

Anomaly Center

Periodically scan all managed instances and databases and provide user a holistic view to see all anomalies.

Drift Detection

Periodically scan all managed instances and databases and provide user a holistic view to see all anomalies.

Backup and Restore

Per-database automatic and manual backup. Environment specific backup schedule policy. Restore to new database with the entire restored migration history chain.

Role-based Access Control

Two role set. Owner, DBA, Developer for workspace. Owner, Developer for project.