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What is MDF LDF and NDF?

Article. A Microsoft SQL database consists a primary data file (mdf) a secondary data file (ndf) and a transaction log file (ldf). For this article, we will concern ourselves with the mdf and ldf files. MDF stands for Main Database File and contains all the information in a database. 8 июн. 2020 г.


What is difference between MDF and NDF?

NDF is secondary storage file because SQL server stores user specified data in primary storage file known as MDF. NDF data file is optional and is user-defined to manage data storage in case the primary MDF file uses all the allocated space.

What is SQL LDF and MDF file?

MDF file is the primary file in SQL server database. The LDF is a supporting file. The latter stores the information related to transaction logs. MDF contains database record data. LDF, on the other hand records information related to changes made in the server as well as all the actions performed.

What is NDF file?

An NDF file is a user defined secondary database file of Microsoft SQL Server with an extension . ndf, which store user data. Moreover, when the size of the database file growing automatically from its specified size, you can use . ndf file for extra storage and the . ndf file could be stored on a separate disk drive.

What does LDF file stand for?

An LDF file is a log file created by SQL Server, a relational database management system (RDBMS) developed by Microsoft. It contains a log of recent actions executed by the database and is used to track events so that the database can recover from hardware failures or other unexpected shutdowns.

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