disk driver

The disk driver provides on-disk storage of data -- one file per object.

Each databank is mapped to a directory; each type is a sub-directory of the main databank directory.

Usage

To create a disk databank, use the Databank.get() method:

var Databank = require('databank').Databank;

var db = Databank.get('disk', {dir: '/var/lib/mydatabank'});

The driver takes the following parameters:

• schema: the database schema, as described in the Databank README.
• dir: main directory for the databank. Default is /var/lib/diskdatabank.
• mktmp: if truthy, dir will be ignored, and a new temporary directory under os.tmpDir() will be made. The temporary dir will be deleted when the databank is disconnected.
• mode: creation mode for the main databank dir and its subdirs; default is 0660.
• hashDepth: files under the type subdirs are stored according to a hash of the id; for more efficient retrieval, there are hashed subdirs under each dir. So the state object stored under BRh1Az3 will be found at <maindir>/state/B/BR/BRh/BRh1Az3.json. This value sets the number of subdirs to use.