N-way buffering for PI clients

You can use PI Buffer Subsystem to control the PI point data written by a PI client to Data Archive. When Data Archive is not available, the buffering service temporarily stores the PI client data. Once the server is available, the buffering service sends the data to Data Archive.

To support Data Archive HA for PI clients, you configure PI Buffer Subsystem to use n-way buffering. With n-way buffering, the buffering service fans data to all Data Archive collective members.

There are some important differences between PI client buffering and PI interface buffering:

• You can buffer PI client data only with PI Buffer Subsystem. API Buffer Server cannot buffer client data.

• If your PI clients write data using PI SDK, use PI SDK Utility to configure buffering.

• If your PI clients write data using AF SDK, use PI System Explorer to configure buffering.