What is Oracle database snapshot?
A snapshot is a transactionally (read) consistent reflection of its master table as the data existed at a specific point in time (that is, at creation or when a refresh occurs). To keep a snapshot’s data relatively current with the data of its master table, the snapshot must be periodically refreshed.
What are the characteristics and benefits of a database?
Characteristics and Benefits of a Database
- Self-Describing Nature of a Database System.
- Insulation between Program and Data.
- Support multiple views of data.
- Sharing of data and Multiuser system.
- Control Data Redundancy.
- Data Sharing.
- Enforcing Integrity Constraints.
- Restricting Unauthorised Access.
What do you need to know about Database snapshots?
Database Snapshots (SQL Server) 1 Feature Overview. Database snapshots operate at the data-page level. 2 Benefits of Database Snapshots. Snapshots can be used for reporting purposes. 3 Terms and Definitions. A transactionally consistent, read-only, static view of a database (the source database). 4 Related Tasks
Can you use database snapshots with database mirroring?
Using database snapshots with database mirroring permits you to make the data on the mirror server accessible for reporting. Additionally, running queries on the mirror database can free up resources on the principal. For more information, see Database Mirroring and Database Snapshots (SQL Server).
Is there support for database snapshots in SQL Server 2019?
Prior to SQL Server 2019, the source database could not contain a MEMORY_OPTIMIZED_DATA filegroup. Support for in-memory database snapshots was added in SQL Server 2019. All recovery models support database snapshots.
What happens to database snapshots after role switching?
If role switching occurs, the database and its snapshots are restarted, temporarily disconnecting users. Afterwards, the database snapshots remain on the server instance where they were created, which has become the new principal database. Users can continue to use the snapshots after the failover.