What are nodeapps (node applications )?

Http://inthirties.com: 90/thread-1372-2-1.html
I have been discussing nodeapps with Ricky over the past few days.

What are nodeapps and what are nodeapps?

I found it in Metalink and couldn't find a clear description. I just found this sentence in the guideline of RAC management and mentioned nodeapps.

-On 10.2 and later, running root. Sh on the last node in
Cluster also will create the nodeapps (VIP, GSD and ONS). On 10.1, vipca
Is executed as part of the RAC installation.

I searched online. This topic is discussed in both orafaq and OTN.

Http://asktom.oracle.com/pls/asktom/f? P = 100: 11: 0: p11_question_id: 2068700700346489486

Http://www.orafaq.com/forum/t/73465/2/

Nodeapps includes VIP, GSD, and ONS, and the package does not include listener. This is the focus of the debate here.

One idea is that Listener is not included. As mentioned in Oracle reference, nodeapps (VIP, GSD and
ONS) only this includes the three, but does not include the listener here. I prefer such an answer. I also think that in the RAC system, there are CRS and CRS
The HA applications built at the layer should be divided as follows. VIP, GSD, and ONS constitute a high-availability infrastructure. RAC
Applicate can be deployed on it. If it is an Oracle database, so here
Listener, ASM, instance, database, and service all depend on the cluster application of the Work architecture. In this case, it is clear.
As you can see, the listener must be out of nodeapps. On nodeapps, apart from the Oracle database architecture
Cluster. You can also use HTTP cluster and MySQL
Cluster and so on. It can be seen as the application running on CRS, just like listener. I think this is a rational explanation. I like it theoretically
Ricky shares the same opinion here.

However, the listener is included in the listener. I don't know how others divide them. At least from the management of RAC, I also feel that the actual management structure tends to be
In this conclusion.

To create an experiment. Run on a node of RAC

Srvctl stop nodeapps-N XXXXX

What is the result.

The result is that VIP, GSD, ONS, and lsnr applications are offline. This phenomenon is well explained. lsnr depends on VIP, so
To disable VIP, you must offline the lsnr first.

Let's take a look at the result of srvctl start nodeapps-n xxxxx.

As you can see, the results are all online. As mentioned above, lsnr depends on VIP. The above situation occurs during all the stop operations, but in the start operation, since
Lsnr depends on VIP. Starting VIP should be unrelated to lsnr, but it is not the case that lsnr is enabled together.

Let's take a look at srvctl status nodeapps-N xxxxxx.

Here, the lsnr is also provided to the status. According to this well-founded conclusion, I am stuck in an uncertain thinking. According to the architecture, LSNRCTL should be independent of the three,
However
In the implementation of Oracle, the relationship between the lower layer and the upper layer is unclear. Is it a problem with the implementation of Oracle. In terms of implementation, Oracle may have shown this for some advantages.
Poor. Therefore, in Oracle documents, this is also a flickering word, without a clear description.

You can only see if you can find a clearer answer in a later version.

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