PowerServer deployments are different from traditional PowerBuilder client/server application deployments in the following ways:
During the PowerServer project compilation and deployments:
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All DataWindows/DataStores are automatically converted to .NET models, and then automatically exposed via REST/JSON APIs;
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All embedded SQLs will be deployed to the server side, and then automatically exposed via REST/JSON APIs;
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All PBD files are broken down very granularly into each individual object/definition file.
When an end user starts an installable cloud app for the first time:
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Each client must download and install a supporting program, Cloud App Launcher, and also download the supporting runtime files;
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Each client will download the app files from the web server. There are two possible ways: Download the app files as necessary, or download all the app files at app startup.
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It is possible that some preload events (e.g., commands for environment detection or control registration) shall be executed before the app starts.
When an installable cloud app starts to run:
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The app has no dependency on a web browser (type, version, or settings), and will run and update itself as needed over the Internet;
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The app runs in a web or cloud environment instead of the on-premise environment. It is powered by REST APIs that interface with the data sources, and such REST APIs is hosted in PowerServer in a public or private cloud.
Due to the above differences, it can be well expected that the relevant performance behavior will be different from the client/server applications. This document will provide you with some common performance tuning techniques to get maximum performance out of the PowerServer project development and implementation.
