Prevent archive data loss

After receiving data from an interface, PI Snapshot Subsystem places data in the event queue. PI Archive Subsystem retrieves this data almost instantly. With this waypoint for data, Data Archive continues data collection if the archives or disk become unavailable.

To take advantage of this data waypoint, do not place the event queue on the same physical disk as the archives. Check the location of the event queue on your server and make sure it is on a different disk from the primary archive.

1. Open PI SMT.

2. Under System Management Tools, click Operation > Tuning Parameters, and then click the Snapshot tab.

3. Double-click the Snapshot_EventQueuePath parameter.

   The parameter window opens.

4. Set Value to the desired path for the event queue. Make sure the path is on a different disk from the primary archive. Run the command pidiag -updateFolderSecurity to make sure proper permissions are set in the new path.

5. Restart PI Snapshot Subsystem.

   This moves the event queue file location. You can delete the old event queue file.