CONFIG 语法

    相关的 gflags 参数有四个，其中，max_edge_returned_per_vertex 用来控制一个点最多可以搜索返回的边数，rocksdb_db_options，rocksdb_column_family_options，rocksdb_block_based_table_options 三个参数均为 json 格式，其中每个参数 key 和 value 均为 string 格式。例如可以在 storage 的 conf 文件中做如下设置：

    1.     // rocksdb_column_family_options
    2.     max_write_buffer_number
    3.     level0_file_num_compaction_trigger
    4.     level0_slowdown_writes_trigger
    5.     level0_stop_writes_trigger
    6.     target_file_size_base
    7.     target_file_size_multiplier
    8.     max_bytes_for_level_base
    9.     max_bytes_for_level_multiplier
    10.     ttl
    11.     disable_auto_compactions
    13.     // rocksdb_db_options
    14.     delete_obsolete_files_period_micros
    15.     max_background_jobs
    16.     base_background_compactions
    17.     max_background_compactions
    18.     stats_dump_period_sec
    19.     compaction_readahead_size
    20.     writable_file_max_buffer_size
    21.     bytes_per_sync
    22.     wal_bytes_per_sync
    23.     delayed_write_rate
    24.     avoid_flush_during_shutdown
    25.     max_open_files

    示例

    1. nebula> UPDATE CONFIGS storage:rocksdb_column_family_options = \
    2.         { disable_auto_compactions = false ,         level0_file_num_compaction_trigger = 10 }
    1. nebula> SHOW CONFIGS meta
    2. ============================================================================================================================
    3. | module | name                                        | type   | mode      | value                                        |
    5. ----------------------------------------------------------------------------------------------------------------------------
    6. | META   | help                                        | BOOL   | IMMUTABLE | False                                        |
    7. ----------------------------------------------------------------------------------------------------------------------------
    8. | META   | port                                        | INT64  | IMMUTABLE | 45500                                        |
    9. ----------------------------------------------------------------------------------------------------------------------------
    1. GET CONFIGS [graph|meta|storage :] var

    例如

    1. nebula> GET CONFIGS load_data_interval_secs
    2. =================================================================
    3. | module  | name                    | type  | mode      | value |
    4. =================================================================
    5. | GRAPH   | load_data_interval_secs | INT64 | MUTABLE   | 120   |
    6. -----------------------------------------------------------------
    7. | META    | load_data_interval_secs | INT64 | IMMUTABLE | 120   |
    8. -----------------------------------------------------------------
    9. | STORAGE | load_data_interval_secs | INT64 | MUTABLE   | 120   |
    10. -----------------------------------------------------------------
    1. UPDATE CONFIGS [graph|meta|storage :] var = value

    例如