AlwaysOn and Transaction Log

Availability Groups must retain all transaction log records until they have been distributed to all secondary replicas. Slow synchronization to even a single replica will prevent log truncation. If the log records cannot be truncated your log will likely begin to grow. This becomes a maintenance concern because you either need to continue to expand... » read more

AlwaysOn Synchronous vs Asynchronous

Availability modes There are two availability modes, synchronous commit and asynchronous commit. Selecting a mode is equivalent to selecting whether you want to favor data protection or transaction performance. Both availability modes follow the same work flow, with one small yet critical difference. With synchronous commit mode, the application does not receive confirmation that the... » read more

Database Partition and Performance

A partitioned table is one where the data is separated into smaller physical structures based on the value for a specific column (called the partitioning column, which is defined in the partition function). If you want to separate data by year, you might use a column called DateSold as the partitioning column, and all data... » read more

Azure SQL: Recover Deleted Records

Via Azure Portal, restore a copy of the database from a backup at specific point in time. Via SSMS, copy over deleted records from recovered database back to the original database. Note: In Azure Portal, go to the original database and select “Retore”. Select a point in time before the accidental delete occurred. Time is... » read more

Always On Automatic Failover Jobs

In addition to the automatic failover that occurs for Always On setup, these jobs also needs to be created on both the Primary and the Secondary server to help with the automatic failover. In the event of a failover, all user jobs should be disabled on the Secondary server and enabled on the Primary server... » read more

Add New Job Category

2 Options to add new Job Category via Script via GUI Via Script Via SSMS In Management Studio, the same process is exposed via a dialog located under the SQL Server Agent Jobs node in the Object Explorer as shown below: Right-click the highlighted item and you are presented with the Manage Job Categories dialog... » read more

Create SQL Login for SQL Azure Database

Generating Logins Logins are server wide login and password pairs, where the login has the same password across all databases. Here is some sample Transact-SQL that creates a login: You must be connected to the master database on SQL Azure with the administrative login (which you get from the SQL Azure portal) to execute the... » read more