EMC Avamar 6.1 Manual de usuario descargar pdf (Pagina 20)

Avamar with Data Domain architecture and best practices

The combination of Avamar and Data Domain permits deduplication algorithms to operate at both the

client and the storage system levels. From the Avamar Administrator management console, the

administrator can direct a backup data set to target either the Avamar server or the Data Domain

system.

Protection of Vblock systems with the combination of Avamar and Data Domain involves an

understanding of the differences and benefits of client-side deduplication and in-line deduplication.

Client-side deduplication and in-line deduplication trade-offs

A decision whether to deduplicate at the client or at the storage system relates to protecting a growing

amount of data within a certain time objective:

 Deduplication at the client offers the benefits of network traffic reduction and back-end storage

optimization.

However, this implementation can be less effective for high-change-rate environments, which

can negate some of its savings in backup time and network bandwidth.

 Deduplication in-line at the storage system offers the benefit of massive scale and very rapid

ingestion of data.

However, this implementation is not optimized for network-bandwidth utilization because the full

backup payload must be moved across the network to the storage system before it is

deduplicated.

Integration of Avamar and Data Domain allows some of the deduplication processes normally

run at the storage system to be distributed to a backup server. This can provide some of the

network relief offered by client-side deduplication, while retaining the data ingestion and scale

attributes of deduplication at the storage system.

Today, two challenges that face IT backup administrators are:

 Deploying two separate solutions to optimize for varying workloads

 Minimizing administrative costs for management of two solutions separately

With the features and implementation details highlighted in the sections below, one can clearly see

how the newly introduced integration of Avamar with Data Domain on Vblock systems addresses

these challenges.

Integration of Avamar and Data Domain with Vblock systems

Figure 2 in the architecture overview section depicts the high-level architecture of the combined

Avamar and Data Domain solution on Vblock systems.

At a high level, starting in Avamar v6.1, the administrator can direct whether specific datasets in an

Avamar backup policy will target an Avamar server or a Data Domain system.

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EMC Avamar 6.1 Manual de usuario Pagina 20