Updating Chunks Based on the Comparison of the Hashes

Hello there. I have a question about updating of chunks.

A Japanese documentation says as follows:

  • When you want to update only a specific part of chunks, you can just build the package and replace it with the older one on the server without changing build version of the chunks.

  • Chunks which are not updated will not be downloaded again because their hashes are not updated.

Documentation: 徹底解説!UE4を使ったモバイルゲーム開発におけるコンテンツアップデートの極意!

I personally confirmed that:

  • When you build a package, windowsnoeditor.manifest file will be created under CloudDir directory.

  • The .manifest file has a list of hashes of all chunks you built. A hash in the list will be updated when the chunk is updated.

I’m using “Request Content” node on blueprint to update chunks.
It will always download the chunk regardless of whether the hash is updated or not.

What is the proper way to update chunks?

Chunking is a rather new feature of UE4 and the information is very scarce on the internet.
Do you know anything about the implementation of updating chunks?
Any kinds of clues are welcome.
Thank you.