Administrator Guide

– 3 Terabytes per hour (TB/hr) for passthrough write operations

– 4 TB/hr for optimized write operations

ANMERKUNG: Passthrough writes are when data is sent from a media server to the DR Series

system without applying any optimization to the data. By contrast, optimized writes are when data

is sent from a media server to the DR Series system after optimization is applied to the data.

• Supported OST operations

– Backup (Passthrough writes and Optimized writes)

– Restore

– Replication

ANMERKUNG: To check for the latest supported OST software components and operating guidelines, see the

Dell

DR Series System Interoperability Guide

. This document is available at support.dell.com/manuals.

Rapid Data Storage (RDS): DR Series System

Rapid Data Storage (RDS) is developed by Dell Quest and provides a logical disk interface for use with network storage

devices. RDS allows for better coordination and integration between DR Series system backup, restore, and optimized

duplication operations with Dell Quest NetVault Backup (NVBU).

The DR Series system and NVBU integration is done using the Rapid OFS (ROFS) plugin developed by Dell. The ROFS

plugin allows NVBU control over backup image creation, deletion, and duplication. RDS allows deduplication and

compression operations to happen on the client-side so that network traffic can be reduced.

The RDS protocol allows the supported backup applications to communicate directly with the DR Series system and

determine whether a specific chunk of data already exists on the system. If the data already exists, only the pointers

need to be updated on the DR Series system, and the duplicate chunk of data does not need to be transferred to the

system. This process provides two benefits: it improves the overall backup speed, and also reduces the network load.

Rapid OFS (ROFS) API

ANMERKUNG: Rapid OFS (ROFS) is an internal API used by RDS. The term ROFS is not used in the web user

interface or CLI.

The Rapid OFS (ROFS) API is an application programming interface that allows disk-based devices like the DR Series

system to natively integrate with the Dell Quest NetVault Backup. For example, because the DR Series system supports

both data deduplication and replication, the ROFS API allows these supported DMAs to use the DR Series system

appliance features and duplicate the optimized data from one storage appliance to another.

Unlike replication configured directly on the DR4

00 for CIFS and NFS, the ROFS API allows the Data Management

Application (DMA) to be aware of the replication copy. The ROFS API allows the DMA to restore directly from any

DR4x00 that are on the same subnet and can communicate with each other.

The ROFS API enables the writing of data to disk and allows NVBU (the DMA) to interact with the DR Series system (the

data backup and deduplication device) using the ROFS API.

DR Series System and Data Operations

Data is stored and resides on the Dell DR Series system, a two-rack unit (RU) appliance, which comes preinstalled with

the system software. Starting with the 2.0 release. the DR Series system comes in two types:

• DR4000 system: This consists of preinstalled DR4000 system software on a Dell PowerEdge R510 appliance

platform.

• DR4100 system: This consists of preinstalled DR4000 system software on a Dell PowerEdge R720xd appliance

platform.