Network Failure Protection (NFP)

Often it is useful to store important data on a central data server computer. In case the network connection is interrupted or the central data server computer crashes, data acquisition should continue, of course. For this purpose, all data that are relevant for the Chromeleon server are stored locally on the server's hard disk before the sequence is started. If the network connection is interrupted, the Chromeleon Server can thus continue to process these sequences.

Interruption of the network connection is logged in the Audit Trail (see Data Management  Audit Trails). The Chromeleon server continues to process the Batch using the last conditions. All data are first saved locally. After a network failure, the Chromeleon server attempts, at certain intervals, to write back all data that were temporarily stored on the local drive to their proper locations on the network data server.

In some cases, network recovery might fail due to problems of the ODBC or network driver. Restart the Chromeleon server after batch processing is complete. In order to ensure that Windows and all other applications work properly again Dionex recommends rebooting your PC first.

In addition to the network-failure protection, Power Failure Protection is available.

 Tip:

If the network fails while Chromeleon accesses an Access databases, it may happen that the Chromeleon datasource (mdb file) is damaged. Therefore, Dionex recommends using an MS SQL or Oracle server as central database to protect your data even if the network fails.
Also, refer to How to …: Working with Files, Databases, and Networks  Network Failure/Non-Availability.