What are you going to deploy?

To deploy some application you can use Installer Manifest. 

Look at this article.

It is not so simple as would appear in the first time. Because you can have some mentions to old package in a source. In studio only possible to rename some class with refactoring feature. Unfortunately, this feature is not documented, or I have not found.

I think in this case better to use property ReplyTo, which will be used in mail clients as an address for response.

$zf(-1) can only return status code from called process

To get some output result, you should redirect this output to some file, and read result from this file after executing.

set status=$zf(-1, "find /tmp -name *.tmp > /tmp/result.log")
set fs=##class(%Stream.FileCharacter).%New()
set fs.Filename="/tmp/result.log"
set result=fs.Read()

Thanks, sure, fixed

As it is opened project, you can fill an issue directly on that repository. So, developer may get notification about it quite quickly to respond.

%-variables, stored in local memory of the current process.

Process-private globals, implicitly stored in database CACHETEMP. 

It means, that when you use %-variables, you limited by the memory of your process, (which can be increased programmatically by the way). While Process-private global works exactly as simple global and limited only by free size on the disk. 

And also you should remember that you can not store objects in global variables, even if it is Process-private one.

Access to process-private variables also could be a bit slower than %-variables.

I would recommend looking at HAProxy, I've used it only for HTTP, with about 10 ECP application servers. But while it can work with binary protocols as well, I think it should be useful. Quite easy to configure and monitor it.

I've been working with Caché now a bit less than before. But anyway I see that Atelier very slow, I'm typing much faster, then it can show what I wrote. And still exists some highlighting errors, which I've already described earlier.

Why do you ask about Postman here? 

For Postman does not matter which server do you use. Please go to their documentation, where you can also find some video tutorials.

Because, your UrlMap define only GET method, If you need more, you should add it to the same or any other methods.

And with CRUD, you should not put delete/insert inside URL, just use different HTTP methods with the same URL.

Why do you think it should be in this part of the documentation. It usual procedure. Almost everything possible to do programmatically, so, you can write a script for it. And there are lots of ways ho to do it. As for me, I think the bast way is to use Installer manifest.

Restoration database from the backup is only to restore database file CACHE.DAT. If you want to see this new database on that server, you should configure this server.