leveldb

开源

LevelDB是一个由Google所写的快速密钥值存储库,提供从字符串密钥到字符串值的有序映射.

39.3K stars0 点赞2 次浏览

工具介绍

LevelDB是一个由Google所写的快速密钥值存储库,提供从字符串密钥到字符串值的有序映射.

LevelDB是一个由Google所写的快速密钥值存储库,提供从字符串密钥到字符串值的有序映射. 这个仓库的维护非常有限。我们只审查以下类型的变化。修复关键错误,如数据丢失或内存腐败改变内部支持的leveldb 客户端绝对需要. 这些通常会固定由语言/标准库/OS更新引入的断裂作者:Sanjay Ghemawat ([email protected])和Jeff Dean ([email protected]) 特性键和值是任意字节数组. 数据按密钥排序。呼叫者可以提供自定义比较功能来覆盖排序顺序. 基本操作是Put(键,值),Get(键),删除(键). 在一个原子批次中可以进行多处改变. 用户可以创建一瞬间快照,以获得一致的数据视图. 前进和后退的远征..

核心特点

•Keys and values are arbitrary byte arrays.
•Data is stored sorted by key.
•Callers can provide a custom comparison function to override the sort order.
•The basic operations are Put(key,value), Get(key), Delete(key).
•Multiple changes can be made in one atomic batch.
•Users can create a transient snapshot to get a consistent view of data.
•Forward and backward iteration is supported over the data.
•Data is automatically compressed using the Snappy compression library, but Zstd compression is also supported.
•External activity (file system operations etc.) is relayed through a virtual interface so users can customize the operating system interactions.
•This is not a SQL database. It does not have a relational data model, it does not support SQL queries, and it has no support for indexes.