Predefined CSV file import folders
- Last UpdatedFeb 27, 2025
- 2 minute read
By default, import folders are created in the main AVEVA Historian data folder when the product is installed. For example, if you specified D:\Historian\DATA\Circular as the circular data folder, the CSV data import folder is D:\Historian\DATA\DataImport,.
Important: If you leave the data import path at the default location (on the drive hosting the circular data folder), placing large CSV files in a data import folder may prompt the AVEVA Historian disk management subsystem to immediately start moving or deleting history blocks to maintain the configured amount of required free space on the disk. It is highly recommended to change the data import folder to a different drive than your circular storage.
The different import folders are described in the following table:
|
Import Folder |
Description |
|---|---|
|
\DataImport |
Used for normal CSV import files. |
|
\FastLoad |
Used for "fast load" CSV import files. Files in this folder are processed one at a time, in the order that they appear in Windows Explorer as you are viewing the folder contents. |
|
\Manual |
Used by MDAS for tags. If the amount of data spans multiple 64 KB chunks, files are collected in the \Support subdirectory until all of the data is received. The files are then copied to the \Manual folder for inclusion into history. |
To manually change the predefined import folder
-
Use Windows Explorer to create the new folder.
Note: Be sure that you maintain the \Manual\Support subfolder and optional \FastLoad subfolder. You cannot change the name of the \FastLoad or the \Support folder to another name.
-
Edit the DataImportPath system parameter to specify the new data import folder.
For more information on editing system parameters, see Edit system parameters.
-
Restart the AVEVA Historian.