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What is transaction edit log?
Edit log is a logical structure behaving as transaction logs. It’s stored by NameNode’s directory configured in dfs. Globally, everything that concerns file system: file or directory creation, file metadata changes (permissions, replication) and so on. The list of logged operations can be found in org.
What is in a transaction log?
A transaction log is a sequential record of all changes made to the database while the actual data is contained in a separate file. The transaction log contains enough information to undo all changes made to the data file as part of any individual transaction.
What can you do with a SQL Server transaction log?
Read a SQL Server transaction log. SQL Server transaction logs contain records describing changes made to a database. They store enough information to recover the database to a specific point in time, to replay or undo a change.
What are the operations of the transaction log?
Operations supported by the transaction log. The transaction log supports the following operations: Individual transaction recovery. Recovery of all incomplete transactions when SQL Server is started. Rolling a restored database, file, filegroup, or page forward to the point of failure.
How to reduce transaction log size in SQL Server?
Some operations can be minimally logged to reduce their impact on transaction log size. Log truncation deletes inactive virtual log files (VLFs) from the logical transaction log of a SQL Server database, freeing space in the logical log for reuse by the Physical transaction log.
Is it possible to have multiple transaction log files?
Yes, that is possible, but it’s only recommended in the specific situations. Adding multiple transaction log files will not improve performance of the SQL Server database in any way. Writing can occur only into one file at the time, so parallel I/O operations are not possible.