Modis

Modis implements access layer and data struct layer for OBKV, compatible with Redis protocol.

Quick Start

Build Modis

bash build_modis.sh

Create table in the OceanBase database:

-- string
create table modis_string_table(
  db bigint not null,
  rkey varbinary(16384) not null, # 16K
  value varbinary(1048576) not null, # 1M
  expire_ts timestamp(6) default null,
  primary key(db, rkey)) 
  TTL(expire_ts + INTERVAL 0 SECOND) 
  partition by key(db, rkey) partitions 3;

-- hash
CREATE TABLE modis_hash_table(
  db bigint not null,
  rkey varbinary(8192) not null, # 8K
  is_data tinyint(1) default 1,
  insert_ts timestamp(6) DEFAULT NULL,
  expire_ts timestamp(6) default null,
  field varbinary(8192) not null, # 8K
  value varbinary(1048576) default null, # 1M
  PRIMARY KEY(db, rkey, is_data, field))
  KV_ATTRIBUTES ='{"Redis": {"isTTL": true, "model": "hash"}}'
  PARTITION BY KEY(db, rkey) PARTITIONS 3;

-- set
CREATE TABLE modis_set_table(
  db bigint not null,
  rkey varbinary(1024) not null, # 1K
  is_data tinyint(1) default 1,
  insert_ts timestamp(6) DEFAULT NULL,
  expire_ts timestamp(6) default null,
  member varbinary(15360) not null, # 15K
  PRIMARY KEY(db, rkey, is_data, member))
  KV_ATTRIBUTES ='{"Redis": {"isTTL": true, "model": "zset"}}'
  PARTITION BY KEY(db, rkey) PARTITIONS 3;

-- list
CREATE TABLE modis_list_table(
  db BIGINT NOT NULL,
  rkey VARBINARY(16384) NOT NULL, # 16K
  is_data tinyint(1) default 1,
  insert_ts TIMESTAMP(6) DEFAULT NULL, 
  expire_ts timestamp(6) default null,
  value VARBINARY(1048576) DEFAULT NULL, # 1M
  `index` BIGINT NOT NULL,             
  PRIMARY KEY(db, rkey, is_data, `index`)
)
KV_ATTRIBUTES ='{"Redis": {"isTTL": true, "model": "list"}}'
PARTITION BY KEY(db, rkey)            
PARTITIONS 3;

-- zset
CREATE TABLE modis_zset_table(
  db bigint not null,
  rkey varbinary(1024) not null, # 1K 
  is_data tinyint(1) default 1,
  insert_ts timestamp(6) DEFAULT NULL,
  expire_ts timestamp(6) default null,
  member varbinary(15360) not null, # 15k
  score double default null,
  index index_score(db, rkey, score) local,
  PRIMARY KEY(db, rkey, is_data, member))
  KV_ATTRIBUTES ='{"Redis": {"isTTL": true, "model": "zset"}}'
  PARTITION BY KEY(db, rkey) PARTITIONS 3;

config.yaml file exmaple:

{
  "server": {
    "listen": ":8085",
    "max-connection": 1000, # limit 10000
    "password": "",
    "databases": 256, # databases idx range [0, databases)
    "channel-size": 10,
    "supervised": "no",
    "TLS": {
      "ssl-cert-file": "",
      "ssl-key-file": ""
    }
  },
  "log": {
    "filepath": "./", # filename is fixed as modis.log
    "single-file-max-size": 256, # MB
    "max-backup-file-size": 10, # 0 is not delete
    "max-age-file-rem": 30, # 30 day
    "compress": false,
    "level": "info" # info/error/warn/debug
  },
  "storage": {
    "backend": "obkv",
    "obkv": {
      "config-server-url": "",
      "full-user-name": "",
      "password": "",
      "sys-user-name": "root",
      "sys-password": "",
      "connection-pool-size": 64
    }
  }
}

NOTE:

1. config-server-url is generated by ConfigServer, which format is config_url&database={database_name}
2. full-user-name: the user for accessing obkv, which format is user_name@tenant_name#cluster_name
3. passWord: the password of user in fullUserName.
4. sys-user-name: root or proxy, which have privileges to access routing system view
5. sys-password: the password of sys user in sysUserName.

Documentation

[TODO]

Licencing

Modis is under Apache License, Version 2.0 licence. For details, see the LICENSE file.

Contributing

Contributions are warmly welcomed and greatly appreciated. Here are a few ways you can contribute:

• Raise us an Issue
• Submit Pull Requests. For details, see How to contribute.

Support

In case you have any problems when using OceanBase Database, welcome reach out for help:

• GitHub Issue GitHub Issue
• Official forum Official website
• Knowledge base [Coming soon]