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Why Do You Need Database Archiving When You Already Have Database Compression?

In one of my earlier blogs, I wrote about why you still need database archiving, when you already partition your database.  On a similar vein, many people also ask me why you still need to archive when you already have database compression to reduce your storage capacity and cost. The benefits of archiving, which you can’t achieve with just compression and/or partitioning are still the same:

  1. Archiving allows you to completely move data volumes out of the production system to improve response time and reduce infrastructure costs.   Why keep unused data, even if compressed, on high cost server infrastructure when you don’t need to?  Why add overhead to query processing when you can remove the data from being processed at all?
  2. Avoid server and software license upgrades.  By removing inactive data from the database, you no longer require as much processing power and you can keep your existing server without having to add CPU cores and additional licenses for your database and application.  This further eliminates costs.
  3. Reduce overall administration and maintenance costs.  If you still keep unused data around in your production system, you still need to back it up, replicate it for high availability, clone it for non-production copies, recover it in the event of a disaster, upgrade it, organize and partition it, and consider it as part of your performance tuning strategy.  Yes, it will take less time to backup, copy, restore, etc., since the data is compressed and is smaller, but why even include that data as part of production maintenance activities at all, if it’s infrequently used?
  4. Remove the multiplier effect.  The cost of additional data volume in production systems is multiplied when you consider how many copies you have of that production data in mirrors, backups, clones, non-production systems, and reporting warehouses.  The size multiplier is less since the data is compressed, but it’s still more wasted capacity in multiple locations.  Not to mention the additional server, software license, and maintenance costs associated with the additional volumes in those multiple copies.  So it’s best to just remove that data size at the source.
  5. Ensure compliance by enforcing retention and disposition policies. As I discussed in my previous blog on the difference between archiving and backup, archiving is the solution for long term data retention.   Archiving solutions, such as Informatica Data Archive, have integration points with records management software or provide built-in retention management to enforce the retention of data for a specified period based on policies.  During that period, the immutability and authenticity of the archived data is ensured, and when the retention period expires, records are automatically purged after the appropriate review and approval process.  Regulated data needs to be retained long enough to comply with regulations, but keeping data for too long can also become a legal liability.  So it’s important that expired records are purged in a timely manner.  Just keeping data in production databases indefinitely doesn’t help you to reduce your compliance and legal risks.

Implementing enterprise application and database archiving is just plain best practices.   The best way to improve performance and reduce infrastructure and maintenance costs is to reduce the data volume in your production systems.  Why increase overhead when you don’t have to?  Today’s archiving solutions allow you to maintain easy access to the data after archival, so there is no reason to keep data around just for the sake of accessibility.  By moving inactive but regulated data to a central archival store, you can uniformly enforce retention policies.  At the same time, you can reduce the time and cost of eDiscovery by making all types of data centrally and easily searchable.

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This entry was posted in Application ILM, Application Retirement, Data Governance, Database Archiving, Governance, Risk and Compliance, Operational Efficiency and tagged , , , , , , . Bookmark the permalink.

2 Responses to Why Do You Need Database Archiving When You Already Have Database Compression?

  1. any recommendations for tools that can create highly compressed db archives?

  2. Claudia says:

    Informatica Data Archive allows you to extract dormant data from the database and convert it to what is called an optimized file archive format – extremely compressed (up to 98%), immutable, and secure. Once archived to the optimized file archive format, you can still maintain easy access through odbc/jdbc (so from any reporting or BI tool), without having to uncompress the data.

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