Recovery

Temporal tables – SQL Server

July 4, 2016 by Marko Zivkovic

What is a temporal table?

Temporal tables give us the possibility to retrieve data from any point in the past and for every data change (Update, Delete, Merge). With temporal table users can recover data from accidental changes (update/delete) as well as audit all changes to data, etc. Temporary table is a new feature in SQL Server available from SQL Server 2016 CTP2 version. Read more »

Low cost disaster recovery solution using Azure

August 31, 2015 by Murilo Miranda

We already talked a lot about Azure and hybrid deployments on this. In order to better understand this article I suggest the reading of the article “Azure Blob Storage – Placing database files in the cloud”, as the presented solution will be based on the same approach.

AlwaysOn Availability Groups – How to setup AG between a clustered and standalone instance (Part 1)

April 24, 2015 by Murilo Miranda

In this article we are going to explore how to configure an Availability Group between a clustered instance and a standalone instance, showing, step-by-step, how to setup a possible Disaster Recovery environment.

Introduced on SQL Server 2012, the Availability Groups brought the expectation to be an improved version of the database mirroring, which will be discontinued soon. The AlwaysOn Availability Groups was improved on SQL Server 2014, giving the capability of have more replicas, better troubleshooting possibilities and improving its availability. Comparing the Availability Groups with the database mirroring, in a very high level, we gained the possibility of have a listener to dynamically redirect the connection to the current active instance and also the capability of distribute the read workload between readable replicas. However, only the primary replica is able to write.

Disaster Recovery Planning with Always-On Availability Groups

December 17, 2014 by Derik Hammer

When I configured my first Always-On Availability Group, I setup a Windows Cluster and started with SQL Server Management Studio’s New Availability Group Wizard, scripting out the steps along the way. This entire process took only a matter of minutes. The minimum required steps for configuring the cluster and getting a database into an Availability Group (AG) are very few. This process, however, is deceptively simple. What some don’t realize is that the majority of work required for setting up an AG needs to occur in the planning phase, before a server is even requisitioned. Let us examine the questions that you should ask before implementing an AG.

What is backup and restore in SQL Server disaster recovery?

April 16, 2014 by Ivan Stankovic

Defining SQL Server backup and restore

The SQL Server backup and restore technique involves steps for creating backups, restoring databases, and saving a valid backup copy in a different location. It is a built in SQL Server feature, useful for disaster recovery plans. Read more »

What is SQL Server database mirroring?

March 15, 2014 by Ivan Stankovic

SQL Server database mirroring is a disaster recovery and high availability technique that involves two SQL Server instances on the same or different machines. One SQL Server instance acts as a primary instance called the principal, while the other is a mirrored instance called the mirror. In special cases, there can be a third SQL Server instance that acts as a witness Read more »

What is a SQL Server disaster recovery?

March 14, 2014 by Ivan Stankovic

A SQL Server disaster is an event that causes data loss or any serious SQL Server disruption. Causes of a disaster can be numerous: power failure, hardware failure, virus attack, natural disaster, human error, etc. Some SQL Server disasters cannot be prevented. That’s why a good disaster recovery plan is important Read more »

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