Update Sync Operations
----------------------

A new feature introduced in VOSS Automate 17.4 permits the partner to use the Change
Notification Feature of the CUCM to process update sync operations faster. The
feature is OFF by default, but can be turned on by the partner.

The information here provides guidelines for setting up a sync schedule and lists
the associated performance implications. Details on the operation of this feature
are provided in other documents such as the Core Feature Guide. The changes
mentioned here are not transactions. As a result, information is not displayed in
the translation log, but rather in the special logs created for this feature.

The guidelines presented here are derived from concepts related to total processing
capacity. The total number of updates processed in a time period is the sum of all
of the updates across the customers selected for update in that time period. In
our case, the time period is one hour. In this example, we assume that each customer
has 1000 CUCM-related changes in that hour. The recommendation noted in the table
that follows indicates that 5 customers can run in parallel (concurrently), and
therefore a total of 5,000 changes processed in total. 

If the partner exceeds the recommendation of 5 concurrent customers, a performance
degradation may be observed, and the full set of required changes may not complete
within that hour. Alternatively, if the number of changes for any customer is
significantly higher than the 1,000 or if the total number of changes is
significantly greater than 5,000, then the concurrency number supported may be
less than 5.

If some of the planned changes do not complete within the hour noted in the table
below, then those changes are completed the next time that particular customer is
scheduled for a sync. If the number of changes for any customer is so large that
the changes continually exceed those that can be processed in one hour, it will
eventually result in a full sync. For such customers, we advise to schedule within
an hour where less than 5 customers execute concurrently.

+------------------------------------------+----------------------------------------------------------------------------------------------+
| Configuration                            | Recommendation                                                                               |
+==========================================+==============================================================================================+
| Maximum number of concurrent CNF syn     | 5                                                                                            |
+------------------------------------------+----------------------------------------------------------------------------------------------+
| Maximum number of changes processed per  | 1,000                                                                                        |
| CNF sync                                 |                                                                                              |
+------------------------------------------+----------------------------------------------------------------------------------------------+
| CNF sync schedule frequency              | Once per hour per customer - This is subject to the staggering of CNF sync across customers. |
+------------------------------------------+----------------------------------------------------------------------------------------------+
| Staggering of CNF syncs across customers | Factor of maximum changes processed and                                                      |
|                                          | maximum number of concurrent CNF syncs.                                                      |
+------------------------------------------+----------------------------------------------------------------------------------------------+
| CNF collector frequency                  | Initial recommendation is 15 minutes.                                                        |
+------------------------------------------+----------------------------------------------------------------------------------------------+
| When is Full sync required?              | Weekends only or when there are CNF                                                          |
|                                          | alerts prompting for full sync.                                                              |
+------------------------------------------+----------------------------------------------------------------------------------------------+

If you experience a significant performance issue, you can turn the feature OFF again.
Contact your support representative if you have any performance concerns.