Data Deduplication Efficiency

The Growing Need for Efficient Data Storage

As companies generate data at exponential rates, storing it efficiently becomes a critical challenge. Reliable storage solutions can be costly, considering not only the price of storage devices but also associated expenses like electricity, cooling, maintenance, and floor space. Data deduplication offers a way to address these challenges by significantly reducing the amount of data that needs to be stored.

What is Data Deduplication?

Data deduplication ensures that only a single instance of a piece of data is saved. For example, if ten members of a workgroup each save a copy of the same PowerPoint presentation, deduplication replaces nine of those copies with pointers to the unique file. Users can still access the file seamlessly, but enterprises stretch their storage resources further. This process also improves recovery time objectives (RTOs) and reduces reliance on tape backups.

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Types of Data Deduplication

1. File-Level Deduplication
This method eliminates redundant files, such as identical copies of the same document or presentation, and saves only one unique file.

2. Block-Level Deduplication
This more granular approach saves only unique blocks of data within a file. When a file is updated, only the changed data blocks are stored, making it far more efficient than file-level deduplication.

Deployment Strategies for Data Deduplication

Source Data Deduplication

• Performed in primary storage before data is sent to a backup system.
• Reduces backup bandwidth requirements.
• May impact performance due to higher CPU usage and potential interoperability issues.

Target Data Deduplication

• Performed within the backup system, often on RAID storage arrays.
• Easier to deploy and available in two modes:
  • Post-Process Deduplication: Conducted after data is stored, requiring more initial storage capacity.
  • In-Line Deduplication: Conducted before data is copied, needing less storage capacity.

Maximizing Storage Efficiency

While data deduplication cannot reduce the sheer volume of data being generated, it makes storage significantly more cost-effective. Combining robust RAID arrays with in-line target data deduplication provides a practical solution for reducing stored data with minimal system impact, delivering improved storage efficiency for growing enterprise needs.

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