kkllwww007 / sharkstore

distributed key - value persisted storage system

SHARKSTORE

中文版本

SharkStore is a distributed, persistent key-value store, whose database layer is based on the rocksdb and the replication works are based on raft.

Modules

• master-server(golang) -- metadata server
• data-server(c++) -- database server
• gateway-server(golang) -- proxy
• console(golang) -- web administration

Directory

|-- README.md
|-- console                 web administration tool
|-- data-server             business data storage service, where data is stored
|-- glide.yaml
|-- master-server           metadata service, where you get metadata
|-- model
|-- pkg-go                  common module
|-- proxy
    |-- gateway-server      sql/restful proxy

Architecture Design

See arch.md .

Install

See INSTALL.md .

Performance

We created a table named 'metric' witch 12 columns on 3 data servers with NVMe disk, and each of the columns is integer type. The first four columns(named salt, key, host, ts) are made a unified index together as the key. On the other hand, the table is pre-splitted to 100 ranges with 3 replicas running on raft.

• Batch Insert

  100-row records inserted each time, 61,000,000,000 records inserted totally.

  average response time: 54ms, best tps: 800,000

• Select

  • select one record by salt+key+host+ts

    average response time: 5ms

  • select 10-100 records by salt+key+host

    average response time: 50ms(before caching) VS 8ms(after caching)

Features

• SQL syntax compatible and restful api supported
  Users can access by sql client directly, and also by restful api.

• Dynamic table scheme
  Table columns is allowed to be added or renamed dynamically.

• Pre-sharding
  Pre-sharding is supported when creating a new table.

• Globally sorted data
  User can scan tables by primary key globally.

• Strong consistency.
  Strong consistency is guaranteed by the data replication works on raft group.

• Online scalability | Auto failover | Auto rebalance | Auto schedule
  

• NVMe+SPDK Supported
  Under testing...

License

Under the Apache 2.0 license. See the LICENSE file for details.