Summary: In this technical essay I am going you tell the in-built SQL server 2016 disaster recovery options. And the alternate solution for SQL disaster recovery.
Disaster does not spare anyone whether natural or man-made. And not even the essential and most successful applications for several companies. SQL Server might be a victim of disasters anytime. So, a DBA must have a database backup and disaster recovery procedures. So To save the database files from any sort of damage in case of the before-mentioned circumstances. It is necessary to have a restoration plan before to make the organization to be pressure-free or jolt-free during the time it confronts any failure.
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The latest versions of SQL Server offer few opportunities to set up SQL disaster recovery solutions which can be helpful for SQL DBA directors under challenging conditions. We will be covering them all in the next segment of this article.
You can read: Professional Windows Data Recovery Software
In-built SQL server 2016 disaster recovery options
- Taking Database Backups Periodically
- Practicing Always-On and Basic Database Availability Groups
- Fail-over Clustering
- Database Replication
#Taking Database Backups Periodically
Most of the administrators are knowledgeable of this choice although all don’t take it sincerely. Let us know what an administrator can do for the disaster recovery:
- Database backup using PowerShell, SQL Server Management Studio or using T-SQL backup commands
- Utilize compression as well as encryption while making a database backup
- Use 3 types of database backup techniques:
- Full Database – It is a full backup of the database.
- Differential Database – It is the backup of what has altered after the full-back.
- Partial Database –Backup of only the important data.
- Transaction Log Files – Backup of log files. Done regularly.
- Recover the database from backups when needed.
#Practicing Always-On and Basic Database Availability Groups
SQL Server Enterprise Edition promotes Always-On Database Availability Groups technology which preserves SQL databases by implementing automatic failover. With SQL Server 2017 Standard edition Basic Availability Groups, a DBA can take supervision of a single database. Let us know how they work in details:
- Always-On Availability Groups works on Linux/Windows Server/Windows Failover Cluster.
- It offers synchronization with secondary databases and also synchronized secondary databases for the disaster recovery process.
- Always-On Availability Groups take primary database backups and restore it to another system securely (can be more than one system).
- Then once the Always-On Availability Group is started, it sends all the primary database transactions to the secondary databases.
- Basic Availability Groups work exactly the same as Always-On Availability to protect the SQL database.
- The Basic Availability Groups provide options like synchronous replication or asynchronous replication.
- Basic Availability Groups works for a single primary database and a single secondary server target (though there can be multiple Basic Availability Groups on a single server).
Log-Shipping is accessible in all SQL versions from 2000 including SQL 2017 standard, enterprise editions and for earlier SQL versions.
- In log shipping, the DBA takes the backup of the transaction logs on the primary database.
- Then moving this back up to one or more than one secondary database.
- So Now, restore transactions log backup on the secondary SQL server.
- SQL Database Administrator can choose the time between primary and secondary server database backup.
Always-On Fail-over Clustering Instances helps server protection from unanticipated damage or failure. It helps in disaster recovery through geo-clustering with different cluster nodes are placed at different physical positions.
- Runs on Windows Server with Windows Server Failover Cluster and with Pacemaker on Linux
- Support SQL Server 2017 Standard and Enterprise editions but with nodes limitations on Standard (2 nodes are allowed).
- In this method, the DBA installs SQL Server instances on shared storage.
- Infrastructure is develope with different cluster nodes (failover, primary and other clients) connecting to the shared storage disk
- Whenever any cluster node collapse, the service host on that node can be automatically or manually shift to another node which is known as failover.
This method includes copying SQL Server database data and then distributing it to another database. So let us go through some major points about it:
- Replication technology comprises Publishers which are databases that offer data and Subscribers.
- Any modification in Publishers gets automatically update to Subscribers with synchronization.
- It offers load balancing which allows sharing data and query loads with a number of servers.
Time to End
So, those are the SQL server 2016 disaster recovery options that an SQL DataBase Administrator can carry out and make the database safe & secure against any coming disaster. But if you have corrupted SQL database files along with you, we provide you the latest scheme for its recovery with our SQL database recovery tool. So ShDataRescue SQL Database Recovery carries out the restoration of any damaged database. It deals with database files of all SQL Server versions.