Storage Management in MS SQL 2019 |Storage Management in MS SQL 2019

Database Files and Filegroups
At a minimum, every SQL Server database has two operating system files:
a data file and
a log file.
Data files contain data and objects such as tables, indexes, stored procedures, and views.
Log files contain the information that is required to recover all transactions in the database.
Data files can be grouped together in filegroups for allocation and administration purposes.
Logical and Physical File Names
logical_file_name: 
The logical_file_name is the name used to refer to the physical file in all Transact-SQL statements.
os_file_name: 
The os_file_name is the name of the physical file including the directory path.
It must follow the rules for the operating system file names.
Data File Pages
Pages in a SQL Server data file are numbered sequentially, starting with zero (0).
Each file in a database has a unique file ID number.
To uniquely identify a page in a database, both the file ID and the page number are required.
The example shows the page numbers in a database that has a 4-MB primary data file and a 1-MB secondary data file.
A file header page is the first page that contains information about the attributes of the file.
Several other pages at the start of the file contain system information, such as allocation maps.
File Size
SQL Server files can grow automatically from their originally specified size.
When you define a file, you can specify a specific growth increment.
Every time the file is filled, it increases its size by the growth increment.
Each file can also have a maximum size specified.
If a maximum size isn’t specified, the file can continue to grow until it has used all available space on the disk.
Database Snapshot Files
The form of file that is used by a database snapshot to store its copy-on-write data depends on whether the snapshot is created by a user or used internally:
A database snapshot that is created by a user stores its data in one or more sparse files.
Database snapshots are used internally by certain DBCC commands.
Filegroups
The filegroup contains the primary data file and any secondary files that aren’t put into other filegroups.
User-defined filegroups can be created to group data files together for administrative, data allocation, and placement purposes.
Default (Primary) Filegroup
When objects are created in the database without specifying which filegroup they belong to, they are assigned to the default filegroup.
At any time, exactly one filegroup is designated as the default filegroup.
Rules for designing Files and Filegroups
A file or filegroup cannot be used by more than one database.
For example, file sales.mdf and sales.ndf, which contain data and objects from the sales database, can’t be used by any other database.
A file can be a member of only one filegroup.
Transaction log files are never part of any filegroups.
Recommendations
Most databases will work well with a single data file and a single transaction log file.
If you use multiple data files, create a second filegroup for the additional file and make that filegroup the default filegroup.
To maximize performance, create files or filegroups on different available disks as possible.
Use filegroups to enable placement of objects on specific physical disks.
Put different tables used in the same join queries in different filegroups.
Put heavily accessed tables and the nonclustered indexes that belong to those tables on different filegroups.
Don’t put the transaction log file(s) on the same physical disk that has the other files and filegroups.
SQL Server 2019, SQL Server Database Files and Filegroups, SQL Server 2019 Database Files, SQL Server 2019 Logical and Physical File Names,
SQL Server 2019 File Size, SQL Server 2019 Database Snapshot Files,
SQL Server 2019 Filegroups, SQL Server Files and Filegroups,
SQL Server The Memory Optimized Filegroup, SQL Server Delete Data or Log Files, SQL Server File & Filegroup, SQL Server 2019 Moving Files,
SQL Server 2019 Initializing Files
sql server 2019,sql server management studio,sql server management studio 2019,microsoft sql server 2019 installation,sql server 2019 storage engine,ms sql server 2019,how to install sql server 2019,server name in sql management studio,storage,how to install microsoft sql server 2019,sql server 2019 shared memory,microsoft sql server management studio,install sql server 2019 developer,sql management studio 2012,how to import database in sql server 2019
To learn latest technology online, visit https://www.skillpedia.co