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Architecture overview
The VCE-recommended backup solution includes two options, along with best practices for each:
Avamar on Vblock systems
Avamar with Data Domain on Vblock systems
1 Avamar is backup and recovery software.
2 Avamar is also a hardware platform where deduplicated backup data is stored.
3 It is “client side,” also referred to as “source-based,” deduplication technology.
1 Data Domain is a hardware target that deduplicates and stores backup data.
2 Data Domain requires backup and recovery software. Avamar is the VCE-
recommended software to use with a Data Domain target.
3 Data Domain performs in-line deduplication (as the data is streaming into the
target).
4 Certain Data Domain models are suitable for meeting archival backup
requirements.
The Avamar and Data Domain targets have different backup advantages. Which of them is best for a
particular customer situation depends on the backup workload. Where certain low commonality
workloads (data that does not deduplicate well) could bog down an Avamar-only solution, the addition
of Data Domain as a target for storing the backups allows for an integrated solution that takes
advantage of each product’s strengths.
With Avamar, client-side deduplication of the data is done right in the server whose data is being
backed up. During the backup, the Avamar deduplication process only sends variable-length blocks
of data that have not previously been backed up to the Avamar target. This process dramatically
reduces the nightly backup load on shared network components within the virtual infrastructure. A
typical server backup runs in minutes instead of hours. Therefore, more backups can be run in parallel
and completed within a given backup window.
Alternatively, Data Domain target-based deduplication requires the files that are being backed up to
flow through shared network components to the backup hardware, where it is deduplicated in-line.
The advantage of Data Domain target-based deduplication is its consistent and predictable ingestion
rate, regardless of whether the data has high commonality, making it easy to deduplicate, or low
commonality, which means there is less to deduplicate. Large databases are the most common
backup workload with low-commonality characteristics.
The architectures for the two solutions are shown in Figures 1 and 2.
EMC Avamar NDMP Accelerator
The EMC Avamar NDMP Accelerator is a dedicated single-node Avamar client. When used as part of
an Avamar system, the accelerator provides a complete backup and recovery solution for supported
EMC VNX IP storage systems by using Network Data Management Protocol (NDMP) to communicate
with the storage devices.
Data from the storage device is not stored on the accelerator. The accelerator performs NDMP
processing and real-time data deduplication, then forwards that data to the Avamar server. The
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