MS SQL Server Database Recovery Models
SQL database recovery models are the basic need within the context of backup and restore operations. The main purpose to develop the recovery model is to handle and store the transaction log safely. SQL server recovery model elaborates a property of the database which is recommended to manage the transaction logs, that is required in backing up and the availability of restore operation.
There are three specific recovery models in SQL server database, you can switch your database to any one of them at any time.
- Simple Recovery Model
- Full Recovery Model
- Bulk logged Recovery Model
What SQL Database Recovery Model Are?
Simple Recovery Model
Each recovery models has its unique properties which makes distinguishes between them. Simple recovery model doesn't include the backup of log files. It has the ability to automatically reclaim the space occupied by log data by reducing the requirement related to its size as well as eliminating the needful resource which manages the transaction log space. Simple recovery model doesn't support to those operations that requires transaction log backups.
Some unsupported features of simple recovery model are:-
- Log shipping
- Database mirroring
- Media recovery without data loss
- Point-in-time restores
Full Recovery Model
Whereas in full recovery model, the transaction log is kept preserve by the SQL Server until back it up. It is very helpful for creating disaster recovery plan which includes both full and differential database backups with transaction log backups. Full recovery model is prominent and flexible restoring resource for the SQL database when it turns to failure or in inactive state. The point in time feature helps you to restore a database which got modified and stored in the transaction log, But at certain level of discrepancy like log file damage and redone changes in the recent log backup made this recovery strategy faiure.
BULK-LOGGED Recovery Model
As we talk about the bulk-logged recovery model it a simple and feasible special-purpose model and its prototype is very similar to the full recovery model. The capability to handles bulk data modification operations makes it different from full recovery model. Bulk-logged recovery model uses transaction log files to maintain and stores the whole operations which saves processing time and whole process is knows as minimal logging. Bulk-logged recovery model performs high-performance bulk copy operations; minimal log space is used by bulk operations.
Both recovery models in SQL Server i.e. Full Recovery and Bulk-Logged Recovery are highly reliable and provide secure protection for data in case of disaster recovery.
Possibilities and Reliability Issues
In MS SQL server backup strategies there are specific limitations which restrict to recover SQL Server database from backup. There are many possible reasons for this event failure like log file damage or backup got corrupted due to some malicious activities like virus attack or hardware failure, SQL injection etc. To get out from such type of disastrous situation and to recover SQL database backup the use of SQL database backup repair tool is a relevant solution which gives assured results. It is very helpful and needful at certain point of recovery when you need to recover large database backup files and export to the SQL Server directly. And in some of the cases the SQL administrators and users doesn't maintain or creates a backup due to insufficient time. In such types of complicated situations you may prefer SQL server database recovery tool which is a better resource to fix your problem.
