FTB Revelation Server Hosting

6 GB, which is FTB's own recommended figure against a 4 GB minimum. That covers a group of around six well. Because this is a Java 8 pack, adding a lot more memory is rarely the fix people hope for: very large heaps make garbage collection pauses longer on that runtime, so a laggy Revelation server is usually a chunkloading or worldgen problem instead.

Revelation uses FTB Utilities rather than the modern FTB Chunks, so the limits are rank permissions rather than config settings. Edit the ranks file under `local/ftbutilities` on the server and set `ftbutilities.claims.max_chunks` and `ftbutilities.chunkloader.max_chunks` for the rank you want to change. The file must be valid JSON, so validate it before restarting the server.

No. Minecraft 1.12.2 requires Java 8, and the pack will not boot on Java 17 or 21. The installer selects the Java 8 image for you when it deploys the pack, so this is handled, but it is worth knowing if you are comparing packs: anything on 1.12.2 is locked to that runtime, which is also why heap tuning behaves differently here.

For the right group, yes. It is finished rather than abandoned, still gets occasional maintenance releases, and the mods in it are left close to stock so every wiki and tutorial still applies. What you give up is modern Minecraft: no newer blocks, no current mod ecosystem. If your group wants a settled server that will not change under them, that trade is often the point.

It helps, because this is a normal overworld with a lot of mod worldgen layered into it, and several players exploring at once is the classic source of lag spikes. The pack ships no pregeneration tool, so add Chunk Pregenerator to `mods/` on the server, run it before you invite people, and let it finish. Remove it afterwards if you prefer a clean mod list.

Yes, within 1.12.2 Forge, and every player needs the identical jars since Forge compares the mod list on connect. Upload them into `mods/` through the file manager or SFTP and share the same files with your group. Back up first. Bear in mind the 1.12.2 mod scene is frozen, so what you find is stable but no longer maintained.