Storage optimization of performance tuning methodology

Disk subsystem design

RAID 0
RAID 1
RAID 3
RAID 5
RAID 0+1

Filegroups

Plan database files to improve performance

By default, each database file can be processed at the same time 32 Asynchronous I/O
1 A database file = 32 Reads + 32 Writes
2 A database file = 64 Reads + 64 Writes
Store data files and transaction log files separately to different disk arrays
Data files ：RAID 5 or RAID 0 + 1
Transaction log file ：RAID 1

Use filegroups to improve performance

If the performance bottleneck is Disk I/O, Consider the following methods
Data tables that will be frequently queried or updated , Specify file groups stored in different disk arrays
Index non cluster , Specify file groups stored in different disk arrays
Divide and store commonly used existing data and historical data into different data tables , And specify file groups stored in different disk arrays

RAID+ Filegroups

Table partitioning

TempDB

Store the following objects :

Internal object
Version storage area
User defined objects

Suggest

Automatically expand as needed
Set a reasonable original size
Set the file growth percentage to a reasonable size
Put it in the fast I/O On the system
Create multiple database files , Number and server CPU The same number , Same file size
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