# Introduction
# Aim & composition of this manual
This manual explains the functions of GridDB.
This manual is targeted at administrators who are in-charge of the operational management of GridDB and designers and developers who perform system design and development using GridDB.
The contents of this manual are as follows.
- What is GridDB?
- Describes the features and application examples of GridDB.
- Structure of GridDB
- Describes the cluster operating structure in GridDB.
- The data model of GridDB
- Describes the data model of GridDB.
- Functions provided by GridDB
- Describes the data management functions, and operating functions provided by GridDB.
- Parameter
- Describes the parameters to control the operations in GridDB.
Attention
- GridDB Community Edition is only available in single configuration, and cluster configuration with multiple nodes is limited only to GridDB Enterprise Edition.
- OS user (gsadm) is created when GridDB is installed using the package.
- ODBC is Enterprise Edition only.