There are differences between backup and archive. It is clear that these are two different and complementary technologies. While most IT experts are familiar with backup, many are less comfortable with archive solutions. Here are 5 critical considerations in choosing an archive system.

1. Scale 

Most customers find that their primary data is growing at a rate of somewhere between 20% and 50% per year. Naturally, this challenges storage infrastructures, but remember that much of that data may eventually be archived. Thus, you must assume that your archive data will grow at least as fast as your primary data both now and into the foreseeable future. This is a critical factor in choosing a system because you must be prepared for the future. Additionally, while it is possible to migrate data between archive systems, the process can be lengthy and painful. so you want to minimize the frequency of these massive data moves. Key questions to ask include:

• How large can this archive scale in capacity?
• Is there a way to upgrade the performance of my archive?
• Do you offer migration tools to/from this platform?

2. Protection

Your archive will likely contain the only copy of vital business data, so you must ensure that it is protected. Data loss events can happen to any system at any time. Therefore, a comprehensive backup and DR strategy is critical. Most pundits suggest that you rely on native archive platform technology for protection such as snapshots and replication. However, these embedded mechanisms can add significant cost and complexity. Ask your vendor the following:

• What is your recommended protection strategy for this solution?
• Using this strategy, what ability do I have to roll back my archive to a previous point-in-time?
• Do I need an identical appliance at the remote site for DR purposes and if so, how much will it cost?

3. Compatibility

Archive storage platforms typically integrate tightly with archive applications and server OSes. Thus, it is vital to validate that your choice in archive system is compatible with your existing infrastructure and chosen archive application. Critical questions to ask include:

• Is your system listed on the compatibility list of my chosen archive software?
• What is your process of getting your device qualified when new software releases come out?
• How is support added for new applications?

4. Tiering

Archive systems are optimised for storing data for long periods of time. While most systems rely on disk for long-term storage, tiered archives including tape can deliver meaningful cost savings with only a modest reduction in access time. Ideally, you want an archive system that incorporates a range of storage options to optimize access times and cost. Ask your vendor:

• Does your solution include a concept of storage tiering?
• Is tape a part of your solution?
• How does the economics of your system change over time?

5. Compliance

Often data is stored on an archive for compliance purposes. Industries are different, but many have specific requirements pertaining to long-term data retention and access. For example, some industries require Write Once Read Many (WORM) technology which ensures that data cannot be modified once stored in the archive. As you consider an archive solution, you must carefully consider your compliance requirements and how the solution aligns with your needs. Common questions include:

• Please explain the technologies contained in your device that help me meet my compliance requirements such as WORM or data destruction?
• Can you provide examples of other companies in my industry who are using this solution?
• Have any of your customers faced a legal challenge related to your solution? If so, what was the result?

When considering an archive solution it is vital to consider these key elements to assess how the device will meet your requirements. Of course, not all companies will value each of those criteria, but these provide a good framework to help analyze the options.

Jay Livens has over 10 years of experience working in the data protection industry and is responsible for product and solutions marketing for Iron Mountain’s Data Backup and Recovery products and services.