How to change the number of shared data buffers

You can change the number of shared data buffers by creating the following file(s) on the media server. In the files, enter an integer number of shared data buffers.

Linux/UNIX
For tape:
```
/usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS
/usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS_RESTORE
```
The value specified by NUMBER_DATA_BUFFERS determines the number of shared memory buffers for all types of backups and restores if none of the following NUMBER_DATA_BUFFERS_xxxx files exists.
For disk:
```
/usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS_DISK
```
For multiple copies (Inline Copy):
```
/usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS_MULTCOPY
```
For the FT media server:
```
/usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS_FT
```
```
/usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS_RESTORE_FT
```
Note:
To change the FT media server buffer sizes, contact Veritas support first.
Windows
For tape:
```
install_path\NetBackup\db\config\NUMBER_DATA_BUFFERS
install_path\NetBackup\db\config\NUMBER_DATA_BUFFERS_RESTORE
```
The value specified by NUMBER_DATA_BUFFERS determines the number of shared memory buffers for all types of backups and restores if none of the following NUMBER_DATA_BUFFERS_xxxx files exists.
For disk:
```
install_path\NetBackup\db\config\NUMBER_DATA_BUFFERS_DISK
```
For multiple copies (Inline Copy):
```
install_path\NetBackup\db\config\NUMBER_DATA_BUFFERS_MULTCOPY
```
For the FT media server:
Note: The FT media server is not yet supported on Windows.

More Information

Notes on number data buffers files

Testing changes made to shared memory

How to change the number of shared data buffers

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