Concurrency Control

Deterministic Concurrency Control

* Read-Write locks

Data Model

Key/Value Document / XML

Foreign Keys

Supported

* Documents can refer each other and can be joined by their primary keys

Indexes

Skip List

EJDB2 defines indexes at the collection level and supports indexes of any field of JSON document. Supported unique and non-unique indexes for string, integer, floating point, array JSON value types

Logging

Shadow Paging

Query Execution

Tuple-at-a-Time Model

Query Interface

Custom API HTTP / REST

EJDB provides native query execution methods API. HTTP/Websocket endpoint can activated for querying and data modifications over network.

Storage Architecture

Disk-oriented

Storage Organization

Copy-on-Write / Shadow Paging Indexed Sequential Access Method (ISAM)

System Architecture

Embedded