Experimental Physics and
Industrial Control System

On 01/05/2016 09:55, Zhang, Dehong wrote:

3. does the CA server have its own buffers for each field/broadcasts?  Or it shares the same

    memory locations with the records?

    Here the answer seems to be "yes" for scaler fields, BUT "no" for string or array fields

Correct.
Scalar fields are put in the per-client-queue as values, arrays and strings are put in the queue as pointers.

    does this mean that there is NO guarantee that string/array fields will have the correct

    time stamps?

Correct.
In the congestion case, i.e. when the array data in the record gets updated before an older event is posted, the CA server will send an update to the client that combines the old time stamp (taken from the queue) with the newer data (taken from the record).