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Managing Your Data Archive in the AWS Cloud

Since the need for a reliable data archive is well known, there’s no need for us to focus on that. Instead, we’ll discuss the various data archive options AWS offers its customers. However, we should first make an important distinction between data archives and data backups – as the purpose and function of the two should not be confused.

A data archive is for data not actively in use, but that needs to be moved to a separate storage device for preservation and retention over the long term. Besides preservation, a key goal of a data archive is to reduce the cost of storage. A data archive is not intended to help your system recover from some disaster or failure. Backups – which are performed on both active and inactive data – are designed to permit recovery from data failure.

Bearing that in mind, being able to quickly restore data from a backup medium is likely far more important than it would be for an archive. Such considerations will define the kind of ideal solutions you might choose for your data archive vs. your data backup.

The data archive: traditional considerations

  • You would need to see far into the future, as the medium you are using today may not exist in ten years. It can therefore be a real challenge to identify a viable long-term storage platform.
  • While archived data may not be currently active, they are generally intended for production use. Therefore, reliable security over long periods of time becomes a critical goal.
  • Data archives tend to grow with time, so you will need to realistically consider future costs and scalable infrastructure needs upfront.
  • Most organizations – and especially governments – are very particular about the availability of archived data. The process of meeting such expectations may lead you to improved disaster recovery strategies, but it can also be really complicated and expensive.
  • Implementation can require significant skills and experience across multiple technologies.

However, many of these concerns simply wouldn’t apply to a data archive in the Cloud. Using AWS, for instance, means you never need to invest in a particular technology or medium, or worry about changing standards – that’s all Amazon’s headache. And your costs will always be a direct product of the services you actually use.

Your data archive and the AWS Cloud

Of course, AWS isn’t the only player offering out-of-the-box cloud archiving services, but they’re a good place to start.

S3 and Glacier are, one way or another, the primary AWS tools you’ll use for your data archive. We’ll look at three common use-case scenarios: archives for AWS-based data, on-premise data, and hybrid data solutions.

1. Applications deployed within AWS

If the application to be archived is running within the AWS environment, then integration with S3 or Glacier should be straightforward. Since a data archive doesn’t demand frequent reads, you would normally opt for the cheaper Glacier, which can require a lag of several hours for retrieval. If, however, you’re already storing some application data in S3 (like videos or application logs) and you may not want to write the extra code needed to move inactive data to Glacier, you may instead consider moving only the old, inactive data from S3 to Glacier.

AWS allows you to configure and manage the automated lifecycle of objects in your S3 buckets. You could therefore create a configuration that causes S3 objects to be moved to Glacier based on specified conditions or policies.

A sample policy may look like this:
Data Archive - sample policy

2. Applications deployed on premises

If the components of your application (like a webserver, database, application server, and NFS server) are running within your datacenter, but you still want to use AWS for archiving your backed up data, the simplest solution is to integrate your backup server with AWS S3 or Glacier. This diagram may help you visualize the architecture:
Data Archive ArchitectureIf you’re already using AWS S3 for your backups instead of a local backup server, then you can use S3 Lifecycle management to quickly add a data archive layer using Glacier to your infrastructure.

Even if your backup server doesn’t natively support AWS cloud integration, you can still create a seamless and secure interface between your data center and AWS’s storage infrastructure using AWS Storage Gateway. Storage Gateway won’t require a dedicated network setup between your corporate network and AWS infrastructure, and it is built to support industry standard storage protocols, while storing the encrypted data in AWS S3.
AWS Storage Gateway

3. Applications deployed in a hybrid setup

In this kind of setup, an application deployed on AWS might interact with on-premise components (or the other way around). In such cases, you may want to extend an existing archiving strategy to the cloud, requiring only a reliable way to connect your two networks via either a standard VPN setup or through AWS Direct Connect, which makes it easy to establish a dedicated network connection from your premises to AWS.

Data archive compliance and regulations

Many customers will have specific data retention policies, and must often comply with regulatory guidelines. AWS Glacier offers you Vault Locks. A Vault Lock Policy allows you to apply compliance controls to the contents of any Glacier vault.

To review, here are some of the key advantages you can enjoy by archiving your data in the cloud…and with AWS in particular:

  • No more need to rely on risky predictions of your data growth and corresponding data storage.
  • Reduced overhead of managing huge data stores for long periods.
  • Reduced cost.
  • Increased availability.
  • No more need to identify and invest in some particular hardware and skills to implement a reliable, long-term archival design.

Do you have your own cloud/local archiving experience? Let us know in the comments.

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Written by

Vineet Badola

Working as a cloud professional for last 6 years in various organizations, I have experience in three of the most popular cloud platforms, AWS IaaS, Microsoft Azure and Pivotal Cloud Foundry PaaS platform.Having around 10 years of IT experience in various roles and I take great interest in learning and sharing my knowledge on newer technologies. Wore many hats as developer, lead, architect in cloud technologies implementation. During Leisure time I enjoy good soothing music, playing TT and sweating out in Gym. I believe sharing knowledge is my way to make this world a better place.

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