Disaster Recovery Using Failover Clustering in Sql Server

[VelMurugan]

Disaster Recovery Using Failover Clustering in Sql Server

The disaster recovery is the way, which you can use to help recover data and information, if any kind of data loss occurs. Disaster recovery mapping is the work which is devoted to preparing all of the actions that must take place in response to a disaster.

In Microsoft SQL Server, failover clustering is the most important and widely accepted process of disaster recovery. It is designed to failover automatically when a failure occurs.

The failover clustering of SQL Server can be used for creating failover cluster for a single or multiple instance(s) of SQL Server. It allows the database system to automatically exchange the processing of an instance of SQL Server from the failed server to a working one.

The failover clustering is useful in cases of operating system failure, database corruption, and database system resource up-gradation. It increases the server availability without downtime.

It is the automatic process which occurs in times of server failure. For failover clustering, it is necessary that clustered nodes must be geographically near to each other. It is not useful if a disk array failure takes place.

Along with the advanced features of failover clustering disaster recovery technique, there are several disadvantages also:

* The programs must be installed in order. If you mistakenly don't do the same, the server might fail and you may need to perform recovery by other means.

* You incur a larger expense. The maintenance of two server is very high and can not be afforded by the small organizations.

* If any organization have branches across the globe, the process is not possible as the servers should be at same geographical location.

* There is no protection against disk array failure

* You can not create failover clusters on the object level. It is possible only on database level.

Due to given disadvantages, the failover clustering is not always safe and the possibilities of server failure and database corruption still exists. In such situations, it becomes mandatory to repair the database for smooth running of your business.

The SQL recovery can be performed using the third party applications known as MDF recovery software. Using MDF recovery software is the quickest and easiest way to perform SQL repair.

Stellar Phoenix SQL Database Recovery is the most influential and robust MDF recovery software which is able to repair and restore damaged database in all possible situations. Carrying out SQL repair using this software is very easy due to its intuitive and cool looking user interface with prosperous graphical support.

An intensive scan of the damaged MDF file is done by this SQL recovery software using the powerful scanning algorithms to end up at absolute MDF recovery. You can repair all of the database objects using this SQL repair software including tables, reports, forms, queries, macros, stored procedures, and many alike.

Source : ArticleBase