Understanding How NetVault and DD Boost Work
For more information on this topic, please see the Administration Module 1 Introduction to NetVault Backup-Web-based Training
EMC Data Domain Boost software, also known as DD Boost, is designed to offload part of the Data Domain deduplication process to a backup server or application client. That prevents the Data Domain disk array from having to carry the full burden of the dedupe workload. The software is designed to increase backup speed while decreasing network bandwidth needs. This is particularly advantageous when backups are being written to an off-site Data Domain system over a wide-area network, which may have significant bandwidth limitations.
EMC Data Domain Systems provide disk-based storage with inline deduplication capabilities that reduce storage requirements by 10 to 30 times. NetVault Backup provides seamless integration with Data Domain systems through the EMC DD Boost™ software, allowing you to minimize your backup window and perform optimized disk-based backups while reducing your storage and network bandwidth requirements.
DD Boost components:-
The DD Boost software includes two components:
• DD Boost Library: This component runs on the NetVault Backup Server, and provides the interface to communicate with the DD Boost Server running on the Data Domain system.
• DD Boost Server: This component runs on the Data Domain systems.
DD Boost features :-
DD Boost offers the following features.
• Distributed segment processing: DD Boost offloads parts of the deduplication process to the backup client or server, enabling the client or server to send only unique data segments to the Data Domain system.
Distributed segment processing offers the following advantages:
• It increases the aggregate backup throughput of the storage system and reduces the amount of data transferred over the network.
• It decreases processor utilization on the backup server because sending data over the network is more CPU‑intensive than the distributed deduplication process.
Without this feature, the DD Boost Library sends all data (unique or redundant) to a Data Domain system for deduplication processing.
• Advanced load balancing and link failover: This feature lets you combine multiple Ethernet links into a group, and register a single interface with the backup application. The Data Domain system automatically balances the load for backup and restore jobs on multiple interfaces, and routes the jobs to the available interfaces if one of the interfaces in the group goes down.
• File replication: File-level replication enables transfer of deduplicated data directly between two or more DD Boost-enabled Data Domain systems, and thus reduces WAN bandwidth requirement by up to 99 percent. The Data Domain systems create and transfer the duplicate copies without using any resources on the backup server.
Replication requires optional DD Boost Replicator license. The license must be installed on all participating Data Domain systems.
If the source and target Data Domain systems are running different versions of the Data Domain OS, then for replication to be successful, the target system must be running the higher version of the OS.
*NOTE: The NetVault Backup Starter Edition does not include DD Boost.
Prerequisites :-
NetVault Backup supports systems with Data Domain OS versions 5.1 and above, and the minimum network requirement for NetVault Backup with DD Boost is a Gigabit Ethernet (GbE) link.
Best is to have the system up to date on DD OS and DD Firmware
DD Boost is integrated with the NetVault :-
As you can see below , When you add a Data Domain system to the NVBU Server, NVBU creates several metadata files on the device. Each NVBU Server (to which you add the Data Domain system) creates is its own set of metadata files. NVBU also writes “transfer statistics” to the stats.stnz file. The nvstatsmngr process uses this file and requires that it is regularly updated. However, frequent updates can have a significant performance impact on the system. By default, NVBU updates the file after every 5 seconds or 10 blocks of data transfer
Data Domain System Prerequisites
Overall, DD Boost increases aggregate throughput, substantially reduces backup windows, and improves backup server and application client efficiency.
The following are the key benefits of DD Boost:
• Seamless integration with NetVault Backup
—DD Boost integrates seamlessly with NetVault Backup because the distributed segment processing is handled by the DD Boost Library on the NetVault Client or NetVault Backup Server.
Simple configuration and management is available from within the NetVault console.
On a Windows client the dlls are present in:
C:\Program Files (x86)\Quest Software\NetVault Backup\dynlib\bit64\
libDataDomainoncrpc.dll
libDataDomainpthread.dll
libDDBoost.dll
If unable to load the DD-Boost DLLs & backup fails , please contact EMC Support for assistance regarding EMC maintained dlls.
For instance EMC have limited OS versions support for these DLLs and your OS may not be in the list of supported platforms.
Note:- Automatic deployment and tight integration Data Domain Boost software components are automatically deployed with a NetVault Backup installation, so there are no additional components to install. NetVault Backup tightly integrates with the DD Boost components through the DD Boost API to run parts of the deduplication process so that duplicate data is not sent whenever a DD Boost repository type is used for a NetVault Backup job. These components are available on any NetVault Client and NetVault Backup Server in a domain, so you have maximum flexibility and scalability when using DD Boost
NetVault backup server and clients supports DSP (source side de-dup) :-
Distributed segment processing: DD Boost offloads parts of the deduplication process to the backup client or server, enabling the client or server to send only unique data segments to the Data Domain system
From Data Domain Gui you can see the below :-
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