What is a transaction log file?

What is a transaction log file?

A transaction log is a file – integral part of every SQL Server database. It contains log records produced during the logging process in a SQL Server database. The transaction log is the most important component of a SQL Server database when it comes to the disaster recovery – however, it must be uncorrupted.

How do I read a transaction log file?

View Log Files

1. In Object Explorer, expand Management.
2. Do either of the following: Right-click SQL Server Logs, point to View, and then click either SQL Server Log or SQL Server and Windows Log. Expand SQL Server Logs, right-click any log file, and then click View SQL Server Log. You can also double-click any log file.

How do I check log shipping in sync?

To display the Transaction Log Shipping Status report on a server instance

1. Connect to a monitor server, primary server, or secondary server.
2. Right-click the server instance in Object Explorer, point to Reports, and point to Standard Reports.
3. Click Transaction Log Shipping Status.

Why is my transaction log filling up?

When the recovery mode for a database is set to Full, then a transaction log backup job must be created in addition to backing up the database itself. …

What type of file is a transaction log file?

A SQL Server transaction log file is the part of every SQL Server database. Along with the data file, which has an MDF extension, the transaction log file with a LDF extension, makes a SQL Server database. A SQL Server database can have more than one data file. These additional data files have an NDF extension.

How do I check my SSMS logs?

View the logs

1. In SQL Server Management Studio, select Object Explorer.
2. In Object Explorer, connect to an instance of SQL Server, and then expand that instance.
3. Find and expand the Management section (assuming you have permissions to see it).
4. Right-click SQL Server Logs, select View, and then choose SQL Server Log.

Why is SQL log file large?

There are a number of reasons a log file can fill to extreme sizes. The most common one by far is that the database is in full recovery model, and Transaction Log backups are not happening fast enough, or not happening at all. ldf file is backed up (or checkpointed if you are in Simple Recovery).

What is transaction log What are the typical kind of records in a transaction log?

A transaction log basically records all database modifications. When a user issues an INSERT, for example, it is logged in the transaction log. This enables the database to roll back or restore the transaction if a failure were to occur and prevents data corruption.

What is TUF file in log shipping?

.TUF file is the Transaction Undo File, which is created when performing log shipping to a server in Standby mode. When the database is in Standby mode the database recovery happens when the log is restored; and this mode also creates a file on destination server with .TUF extension which is the transaction undo file.

How do I reinitialize log shipping?

2 Answers

1. Disable the log shipping jobs on both servers.
2. Back up the database on Server A.
3. Restore the database with the backup you just created and with norecovery on Server B.
4. Re-enable the log shipping jobs on both servers.

How do I fix a full transaction log?

Answers

1. Backing up the log.
2. Freeing disk space so that the log can automatically grow.
3. Moving the log file to a disk drive with sufficient space.
4. Increasing the size of a log file.
5. Adding a log file on a different disk.
6. Completing or killing a long-running transaction.