| config option | default value | descrition |
|---|---|---|
| backend | cassandra | The data store type, available values are [memory, cassandra, rocksdb, scylladb, mysql] |
| serializer | cassandra | The serializer for backend store, available values are [text, cassandra, binary, mysql] |
| store | hugegraph | The database name like Cassandra Keyspace. |
| store.graph | graph | The graph table name, which store vertex, edge and property. |
| store.schema | schema | The schema table name, which store meta data. |
| vertex.default_label | vertex | The default vertex label. |
| vertex.tx_capacity | 10000 | The max size(items) of vertices(uncommitted) in transaction. |
| edge.tx_capacity | 10000 | The max size(items) of edges(uncommitted) in transaction. |
| graph.cache_capacity | 10485760 | The max cache size(items) of graph data(vertex/edge). |
| graph.cache_expire | 600 | The expire time in seconds of graph data(vertex/edge). |
| gremlin.graph | com.baidu.hugegraph.HugeFactory | Gremlin entrence to create graph |
| schema.cache_capacity | 1048576 | The max cache size(items) of schema data. |
| schema.illegal_name_regex | .\s+$|~. | The regex specified the illegal format for schema name. |
| snowflake.datecenter_id | 0 | The datacenter id of snowflake id generator. |
| snowflake.force_string | false | Whether to force the snowflake long id to be a string. |
| snowflake.worker_id | 0 | The worker id of snowflake id generator. |
| rate_limit | 0 | The max rate(items/s) to add/update/delete vertices/edges. |
| config option | default value | descrition |
|---|---|---|
| cassandra.host | localhost | The seeds hostname or ip address of cassandra cluster |
| cassandra.port | 9042 | The seeds port address of cassandra cluster |
| cassandra.connect_timeout | 5 | The cassandra driver connect server timeout(seconds) |
| cassandra.read_timeout | 20 | The cassandra driver read from server timeout(seconds) |
| cassandra.keyspace.strategy | SimpleStrategy | The keyspace strategy |
| cassandra.keyspace.replication | 3 | The keyspace replication factor |
| cassandra.username | The username to use to login to cassandra cluster. | |
| cassandra.password | The password corresponding to cassandra.username | |
| cassandra.compression_type | none | The compression algorithm of cassandra transport: none/snappy/lz4. |
| config option | default value | descrition |
|---|---|---|
| rocksdb.allow_mmap_reads | false | Allow the OS to mmap file for reading sst tables. |
| rocksdb.allow_mmap_writes | false | Allow the OS to mmap file for writing. |
| rocksdb.bulkload_mode | false | Switch to the mode to bulk load data into RocksDB. |
| rocksdb.compaction_style | LEVEL | Set compaction style for RocksDB: LEVEL/UNIVERSAL/FIFO. |
| rocksdb.compression_type | snappy | The compression algorithm of RocksDB: snappy/z/bzip2/lz4/lz4hc/xpress/zstd. |
| rocksdb.data_disks | [] | The optimized disks for storing data of RocksDB. The format of each element: STORE/TABLE: /path/to/disk |
| rocksdb.data_path | rocksdb-data | The path for storing data of RocksDB. |
| rocksdb.log_level | INFO | The info log level of RocksDB. |
| rocksdb.max_background_compactions | 4 | The maximum number of concurrent background compaction jobs. |
| rocksdb.max_background_flushes | 4 | The maximum number of concurrent background flush jobs. |
| rocksdb.max_bytes_for_level_base | 536870912 | The upper-bound of the total size of level-1 files in bytes. |
| rocksdb.max_bytes_for_level_multiplier | 10.0 | The ratio between the total size of level (L+1) files and the total size of level L files for all L |
| rocksdb.max_open_files | -1 | The maximum number of open files that can be cached by RocksDB. |
| rocksdb.max_subcompactions | 4 | The value represents the maximum number of threads per compaction job. |
| rocksdb.max_write_buffer_number | 6 | The maximum number of write buffers that are built up in memory. |
| rocksdb.max_write_buffer_number_to_maintain | 0 | The total maximum number of write buffers to maintain in memory. |
| rocksdb.min_write_buffer_number_to_merge | 2 | The minimum number of write buffers that will be merged together. |
| rocksdb.num_levels | 7 | Set the number of levels for this database. |
| rocksdb.optimize_mode | true | Optimize for heavy workloads and big datasets. |
| rocksdb.sst_path | The path for ingesting SST file into RocksDB. | |
| rocksdb.target_file_size_base | 67108864 | The target file size for compaction in bytes. |
| rocksdb.target_file_size_multiplier | 1 | The size ratio between a level L file and a level (L+1) file. |
| rocksdb.use_direct_io_for_flush_and_compaction | false | Enable the OS to use direct reads and writes in flush and compaction. |
| rocksdb.use_direct_reads | false | Enable the OS to use direct I/O for reading sst tables. |
| rocksdb.wal_path | rocksdb-data | The path for storing WAL of RocksDB. |
| rocksdb.write_buffer_size | 134217728 | Amount of data in bytes to build up in memory. |
| config option | default value | descrition |
|---|---|---|
| jdbc.driver | com.mysql.jdbc.Driver | The JDBC driver class to connect database |
| jdbc.url | jdbc:mysql://127.0.0.1:3306 | The url of database in JDBC format |
| jdbc.username | root | The username to login database |
| jdbc.password | The password corresponding to jdbc.username | |
| jdbc.reconnect_interval | 3 | The interval(seconds) between reconnections when the database connection fails |
| jdbc.reconnect_max_times | 3 | The reconnect times when the database connection fails |