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vRanger 7.8 - Integration Guide for EMC Data Domain Boost (DD Boost)

DD Boost features

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Understanding DD Boost > DD Boost features

This topic provides a technical overview of EMC® Data Domain® Boost (DD Boost™) features. Configuration information for these features is described in Configuring the Data Domain system.

Distributed segment processing

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Understanding DD Boost > DD Boost features > Distributed segment processing

Distributed segment processing allows parts of the deduplication process to be performed by the EMC® Data Domain® Boost (DD Boost™) Library, which avoids sending duplicate data to the EMC® Data Domain® system that is configured as a vRanger repository. The option to distribute the processing is enabled or disabled on the Data Domain system; for more information, see Configuring distributed segment processing. The DD Boost Library negotiates with the Data Domain system for the current setting of the option and behaves appropriately. Therefore, the DD Boost Library offers two modes of operation for sending backup data to a Data Domain system: one with distributed segment processing enabled and the other with the distributed segment processing disabled.
For more information about local compression and its configuration, see the EMC Data Domain Operating System Administration Guide.
You manage distributed segment processing by using the ddboost option commands, as described in Using the DD Boost commands.
In this mode, the EMC® Data Domain® Boost (DD Boost™) Library sends the data directly to the Data Domain system over the LAN. The Data Domain system then segments, deduplicates, and compresses the data before it is written to the disk. The DD Boost Library runs on the backup server.
In this mode, the deduplication process is distributed between the EMC® Data Domain® Boost (DD Boost™) Library and the Data Domain system.

Advanced Load Balancing and Link Failover

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Understanding DD Boost > DD Boost features > Advanced Load Balancing and Link Failover

vRanger supports a single host name and IP address per repository. For EMC® Data Domain® systems that require multiple 1 GbE links to obtain full system performance, you must set up multiple storage servers on the Data Domain systems — one per interface — and target the backup policies to different storage servers to spread the load on the interfaces.
The Advanced Load Balancing and Link Failover feature allows for combining multiple Ethernet links into a group. Only one of the interfaces on the Data Domain system is registered with vRanger. The EMC® Data Domain® Boost (DD Boost™) Library negotiates with the Data Domain system on the interface registered with vRanger to obtain an interface to send the data. The load balancing provides higher physical throughput to the Data Domain system compared to configuring the interfaces into a virtual interface using Ethernet level aggregation.
Since only one interface group is supported on the EMC® Data Domain® system, for connecting more than one backup server, a switch is needed in the middle.

Managed file replication

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Understanding DD Boost > DD Boost features > Managed file replication

File replication replicates a single file. The replication request is initiated by the application. By default, the backup servers set up replication jobs between two EMC® Data Domain® systems after authenticating them using the pre-configured EMC® Data Domain® Boost (DD Boost™) user name and password. If the replication feature is enabled, when an optimized job is set up by backup servers, the session between the source and destination Data Domain systems is encrypted using Secure Sockets Layer (SSL), ensuring all image data and metadata is sent encrypted over the WAN.
Both the source and the destination EMC® Data Domain® systems must be running Data Domain OS 5.2 or later to use this feature.
The low-bandwidth optimization option is available to EMC® Data Domain®s systems with an installed Replicator license. The option is enabled on a Data Domain system and applies to all replication jobs on that system.
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