Nov 11, 2015

EMC Data Domain DD Boots

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Data DomainBoost extends optimization capabilities of Data Domain solutions. The main advantages for DD Boost are improved throughput, backup server managed file replication and backup server replication awareness.






The benefits of DD Boost include improved throughput. This is improved throughput of retaining data backups that is accomplished with the open storage technology (OST) protocol, and the Data Domain Distributed Segment Processing, DSP. OST, when compared to CIFS and NFS protocols, has a faster throughput.
The Distributed Segment Processing offloads part of the deduplication process to the backup server. Why is backup server managed file replication beneficial?
Without DD Boost, replication is initiated and managed by the Data Domain system. The backup server is not aware of the data written on the replica Data Domain system, system B in the diagram. With DD Boost, the backup server can now control and manage file replication. Why is this backup server awareness of the replica Data Domain system beneficial? Because DD Boost allows for the backup server to be aware of the replica system, it can directly restore and recover from the replica. Prior to DD Boost, the backup server didn't control or manage replica data. This made restoring the data from replica a manual process.




Let's compare deduplication process with and without DSP. in this illustration, the deduplication process is performed on the Data Domain system without DSP. Without DSP enabled, the entire deduplication process is performed on one system.
The Data Domain goes through the process of segmenting, fingerprinting, filtering, compressing, and finally writing the data to disk. The backup server has no part in the deduplication process



With DSP enabled, the process is distributed between the backup server and the Data Domain system. The creation of segments and fingerprints, along with the segment compression, is performed on the backup server. The Data Domain system filters the fingerprints and writes the segments to the Data Domain system disk.
Note that the overall deduplication process remains the same with or without DSP. Enabled DSP merely changes which component – whether the backup server or the Data Domain system – performs parts of the process




The DD Boost advanced load-balancing and link failover functionality supports transparent failover of jobs. In-flight jobs on failed ports on the DD system are transparently moved to healthy links on the Data Domain system, and subsequent jobs are sent to the healthy links. This further improves the enterprise robustness of the backup environments that use Data Domain Boost.

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