Thanos is a PHP library to automatically detect and remove unused chunks from Minecraft worlds. This can reduce the file size of a world by more than 50%.
Other than existing tools, this library does not use blocklists. Instead, the inhabited time value is used to determine whether a chunk is used or not. This prevents used chunks from sometimes being removed by accident and makes this library compatible with most mods and plugins.
Currently, only the Minecraft Anvil world format (Minecraft Java Edition) is supported.
composer require aternos/thanosTo work with LZ4 compressed chunks (Minecraft 1.20.5+), you should also install the PHP LZ4 extension.
This library includes a simple cli tool.
./thanos.php /path/to/world/directory [/path/to/output/directory]Thanos uses Taskmaster for asynchronous tasks, which can be configured using environment variables.
While Thanos will generally work on Windows, it will be much slower since asynchronous tasks are not supported. It is therefore recommended to use the Windows Subsystem for Linux to run Thanos on Windows.
World features like trees that cross chunk borders can sometimes look cut off, if the chunk containing half of the feature is removed while the other half is not. Details can be found in this issue: https://github.com/aternosorg/thanos/issues/20
A world object represents a Minecraft world with all its files. It allows iteration over all chunks and provides a function to copy all non-region files to the output directory.
$world = new Aternos\Thanos\World\AnvilWorld("/path/to/world/directory", "/path/to/output/directory");
$world->copyOtherFiles(); //copy non-region files
foreach ($world as $chunk){
echo $chunk->getInhabitedTime() . "\n"; //output inhabited time for each chunk
}After iterating over all chunks of a region file, it will be automatically saved to the output directory.
getPath() : string Get world directory path
getDestination() : string Get world output directory
getOtherFiles() : string[] Get all files, that are not region directories
copyOtherFiles() : void Copy all files, that are not region directories, to the output directory
static isWorld(string $path) : bool Check if $path is world directory
A chunk object represents a Minecraft world chunk. Due to performance reasons, chunk data is not completely parsed but only used to find metadata that helps to determine whether a chunk is used.
if($chunk->getInhabitedTime() > 0){
$chunk->save();
}If a chunk is not marked as saved, it will not be written to the output directory.
getOffset() : int Get offset of chunk data within the region file
getLength() : int Get length of raw chunk data
getData() : string Get raw chunk data
getInhabitedTime() : int Get InhabitedTime value from chunk data. Returns -1 if InhabitedTime could not be read.
getLastUpdate() : int Get LastUpdate value from chunk data. Returns -1 if LastUpdate could not be read.
setTimestamp(int $timestamp) : void Set last modification time
getTimestamp() : int Get last modification time
save() : void Mark chunk as saved
isSaved() : bool Check whether this chunk is marked as saved
Thanos automatically finds unused chunks in a world and reduces them to atoms.
$thanos = new Aternos\Thanos\Thanos();
$thanos->setMaxInhabitedTime(0);
$world = new Aternos\Thanos\World\AnvilWorld("/path/to/world/directory", "/path/to/output/directory");
$removedChunks = $thanos->snap($world);
echo "Removed $removedChunks chunks\n";setMinInhabitedTime(int $minInhabitedTime) : void Set min inhabited time for a chunk to not be removed
getMinInhabitedTime() : int Get min inhabited time
snap(WorldInterface $world) : int Remove unused chunks, returns the amount of chunks removed