# Partition a Knowledge Graph¶

For distributed training, a user needs to partition a graph beforehand. DGL-KE provides a partition tool dglke_partition, which partitions a given knowledge graph into N parts with the METIS partition algorithm. This partition algorithm reduces the number of edge cuts between partitions to reduce network communication in the distributed training. For a cluster of P machines, we usually split a graph into P partitions and assign a partition to a machine as shown in the figure below.

## Arguments¶

The command line provides the following arguments:

• --data_path DATA_PATH The name of the knowledge graph stored under data_path. If it is one ofthe builtin knowledge grpahs such as FB15k, DGL-KE will automatically download the knowledge graph and keep it under data_path.
• --dataset DATA_SET The name of the knowledge graph stored under data_path. If it is one of the builtin knowledge grpahs such as FB15k, FB15k-237, wn18, wn18rr, and Freebase, DGL-KE will automatically download the knowledge graph and keep it under data_path.
• --format FORMAT The format of the dataset. For builtin knowledge graphs, the format is determined automatically. For users own knowledge graphs, it needs to be raw_udd_{htr} or udd_{htr}. raw_udd_ indicates that the user’s data use raw ID for entities and relations and udd_ indicates that the user’s data uses KGE ID. {htr} indicates the location of the head entity, tail entity and relation in a triplet. For example, htr means the head entity is the first element in the triplet, the tail entity is the second element and the relation is the last element.
• --data_files [DATA_FILES ...] A list of data file names. This is required for training KGE on their own datasets. If the format is raw_udd_{htr}, users need to provide train_file [valid_file] [test_file]. If the format is udd_{htr}, users need to provide entity_file relation_file train_file [valid_file] [test_file]. In both cases, valid_file and test_file are optional.
• --delimiter DELIMITER Delimiter used in data files. Note all files should use the same delimiter.
• -k NUM_PARTS or --num-parts NUM_PARTS The number of partitions.