Buffering

Buffering of data occurs on the interface nodes while Data Archive is unavailable. Buffering processes include PI Buffer Subsystem (pibufss) and API Buffer Server (bufserv).

• API Buffer Server (bufserv)

  The API Buffer Server buffers data from PI interface nodes and client nodes in case the Data Archive server receiving the data becomes unavailable for any reason. This might occur during a network outage, maintenance, or backup.

• PI Buffer Subsystem (PIBufss)

  PIBufss is designed to enhance the high availability (HA) features of PI Server. PIBufss has most of the same capabilities of bufserv, with a few differences. PI Buffer Subsystem buffers data only to one non-replicated PI Server or one PI collective (with its various member nodes). PI Buffer Subsystem works with PI Server 3.4.375 or later.

  Note: Only one Buffer Type can be enabled on a machine at any time. If the Buffering dialog detects that both types are enabled, an error message is displayed.