Quick Start

The storage can be based on commodity hardware that does not have built-in data redundancy. For

hardware that has built-in data redundancy, this mode provides an additional software redundancy

layer.

At least eight nodes are required. The system can survive a failure of two nodes without data loss.

The data redundancy overhead is 40 percent, which means that 1.4 GB of disk space is required to

store 1 GB of data.

Express mode

This mode is designed to provide an additional software redundancy layer when deployed on virtual

hosts that share a common storage device that has built-in data redundancy.

At least six nodes are required. The system can survive a failure of one node without data loss. The

data redundancy overhead is 20 percent, which means that 1.2 GB of disk space is required to store 1

GB of data.

This mode assumes a smooth transition to the advanced mode.

Evaluation mode

This mode does not provide software-level redundancy; therefore it creates no data redundancy

overhead.

This mode is designed for product evaluation and assumes a mandatory transition to either the

express or the advanced mode. For this purpose, we recommend six virtual nodes. The system

cannot survive a node failure.

Do not use the evaluation mode in your production environment!