Conference varese::basestar_open

##    	When we create B* Open objects, these objects are stored in the B*
##    Open Server(s) Node(s), aren't they ? I mean, the object is stored in
##    the node where the concerning activity is running (one node from
##    the node_list specified).

Correct.


##    	In B* Open Client nodes, there isn't any B* Open objects database to
##    store the objects in a dual configuration, is it ?

Sorry, but what do you mean by "dual configuration" ?
Do you mean a sort of "cache" kept in B* Client nodes ?


##	So, what the B* Open
##    Client must to do is, whenever he wants to update/inquiry a B* Open
##    data_point, it sends a put_value/get_value message to the B* Open
##    Server. Is this correct ?

Correct.


##    	Then, suppose we have 3000 analog data_points, changing their
##    value all the time. Will the B* Open Client send messages to the B*
##    Open Server for each change in these analog points ? If will, the
##    network perfomance won't be damaged ?

Here are some considerations.

First of all, B* allows the creation of structured data_points, that's to say
you can create arrays and structures in a way very close to the C language.

So,suppose you collect the 3000 data_point in an array or a struct, with a 
single get/put value you can transfer all of them (you say they change their 
value all the time, so it may have sense); then, you can use the Mapped Data 
Points feature to access them individually.

Second, if the data that are changing are on the Server side, you can use the
Trigger/Event/Event Parameters features to receive on the Client side only the
points that have changed their values.


##    	Where can i get information about the communication between B* Open
##    Clients and Servers ?

Just think of it like an RPC between the Clients and the Servers; then add a B* 
way of configuring where on the net to find the Realms you need.


## And about several realms running at the same time ?

There is no problem when several processes accessing diverse Realms on diverse
nodes on the net; the only limitation is that a single process cannot access
more than one Realm at the same time, but we will drop this limitation in one of 
the next releases.





		< Aldo >

    
    	Sorry.
    	When i say dual configuration i want to mean B* Open Client nodes
    store data_points contents locally, in a cache data area. So there
    would be two areas with the same information stored.
    	Thanks for your help.
    	Regards,
    	Marcius Machado
    

There is no cache data area inside the client.


		< Aldo >