Leveldb

Fast and lightweight key/value database library by Google

LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values.

Features

• 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 Putkey,value, Getkey, Deletekey.
• 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.
• External activity file system operations etc. is relayed through a virtual interface so users can customize the operating system interactions.
• Detailed documentation about how to use the library is included with the source code.