2.2.3 Configuration when standard adaptors are used

This subsection describes the configuration of an adaptor group when the standard adaptors are used and the mode of connection between the standard adaptors and the SDP server. It also discusses the relationship between the standard adaptors and streams.

Organization of this subsection
(1) Configuration of an adaptor group
(2) Mode of connection between standard adaptors and SDP server
(3) Relationship between standard adaptors and stream queue (stream)

(1) Configuration of an adaptor group

In the case of using standard adaptors, the group of adaptors is called an adaptor group. The following figure shows an example of a configuration of an adaptor group.

Figure 2-5 Example configuration of an adaptor group

[Figure]

Only one adaptor group can be run by a single SDP server. You run standard adaptors in an adaptor group.

You can manage a maximum of 64 input adaptors and 64 output adaptors per adaptor group. In the adaptor group, a thread is assigned to each adaptor and all adaptors are run in a single process.

(2) Mode of connection between standard adaptors and SDP server

As mentioned in 2.2.2(2) Connection mode between adaptors and SDP server, the modes of connection between adaptors and the SDP server are the in-process connection and the RMI connection.

Standard adaptors are connected with the SDP server in adaptor groups. An adaptor group used in the in-process connection mode is called an in-process group, and an adaptor group used in the RMI connection mode is called an RMI group.

Note that adaptors in the in-process connection mode and adaptors in the RMI connection mode cannot be intermixed in the same adaptor group. For example, you cannot have a configuration in which the input adaptors form an RMI group and the output adaptors form an in-process group.

The following discusses the configurations of an in-process group and an RMI group.

(3) Relationship between standard adaptors and stream queue (stream)

With standard adaptors, there is a 1-to-n correspondence between an input adaptor and input stream queues (input streams). That is, one input adaptor can send stream data to multiple input stream queues. The following figure shows the relationship between an input adaptor and input streams.

Figure 2-8 Relationship between input adaptor and input streams

[Figure]

On the other hand, there is a 1-to-1 correspondence between an output adaptor and an output stream queue (output stream). That is, one output adaptor receives stream data from a single output stream queue. This means that if there are multiple output streams, you must create an output adaptor for each output stream. The following figure shows the relationship between output adaptors and output streams.

Figure 2-9 Relationship between output adaptors and output streams

[Figure]