A Key-Value data storage system. - dorea db

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Database rust database storage
Overview

Dorea DB 🛰

Build GitHub Code

Dorea is a key-value data storage system. It is based on the Bitcask storage model

Documentation | Crates.io | API Doucment

简体中文 | English

Features

Some Information for dorea

Data Sturct

Dorea have the basic data type and some compound type.

  • String
  • Number
  • Boolean
  • List <DataValue>
  • Dict <String, DataValue>
  • Tuple <DataValue, DataValue>

Storage Model

dorea based on the Bitcask storage model. (Log)

All insert, update, delete operations are implemented as appends.

key: foo | value: "bar" | timestamp: 1626470590043 # Insert Value
key: foo | value: "new" | timestamp: 1626470590043 # Update Value (append info)
key: foo | value:  none | timestamp: 1626470590043 # Remove Value (append info)

When a storage file reaches a maximum capacity, it is archived and a new write file is created.

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Comments
  • overdue data can't be clean

    overdue data can't be clean

    I've changed the GET to un-mut, the get operation will not delete the overdue data (just return DataValue::None)

    but if change the get operation to mut, this operation cannot be async run.

    so I have to think how to fix this BUG.

    bug 
    opened by mrxiaozhuox 2
  • web-service api support

    web-service api support

    I think TCP + Protocol is not convenient for other language to connect, so I will create a web service for Dorea.

    The struct of API is look like this:

    https://domain.com:3451/@{group_name}/{operation}/

    Response:

    {
    "alpha": "{status}",
    "data": {},
    "message": "{error_message}",
    "resptime": "{timestamp}"
}

    the api validation will use JWT.

    enhancement 
    opened by mrxiaozhuox 1
  • 关于库卸载的探讨

    关于库卸载的探讨

    目前我正在完成库自动卸载的功能，目前正在完成相关的 缓存淘汰机制 构思

    我为它设计了 权重 这一概念，它会根据库近期的操作进行审断。

    • 插入（编辑）数据 +2
    • 删除数据 +1
    • 清空数据 +10

    我们认为：当一个库被清空时，会释放大量的 Index 空间给其他库或数据，所以我们会奖励 10 的权重值。

    卸载时的其他限制：

    • 当前被使用的库不会卸载
    • 索引数为零的库不会卸载

    当有线程（连接）尝试加载新的数据库时，我们优先卸载数据量较大的数据库（因为不确定新载入的库有多少数据）

    idea 
    opened by mrxiaozhuox 0
  • [Feature]: Fuzzy Search

    [Feature]: Fuzzy Search

    I think Dorea need focus on Read direction (because the storage model is not suitable for Write)

    So I want to add a command to fuzzy search some data from db:

    ~> search *.user key
[OK]: ["1.user", "2.user", "3.user"]

    Use this command, you can search some keyword from key. (Match-Grammar like Regular expression)

    opened by mrxiaozhuox 0
Releases(v0.3.1)
Owner
ZhuoEr Liu
何为世间锦绣词，我与明月两不知。
ZhuoEr Liu
GitHub https://dorea.mrxzx.info
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