# Planning Archive Storage Tiers

## Use Cases

Archive storage tiers are designed for one or more of the following use cases:

- Long-Term Retention for Backup Data

  Backup data which is not actively used to recover operational business services, but must be kept for policy, regulatory, or other purposes.

- Very Long-Term Retention for Archival Data

  Archival data which is no longer actively used in operational business services, but must be kept available for recovery (at cost), if required by business.

- Regulatory Retention for Archival Data

  Archival data which is no longer actively used in operational business services, but must be kept available for recovery (at cost), if required for regulatory/compliance reasons.

## Solutions

Commvault software supports the following methods to store data in archive storage tiers:

- Combined Storage Tier

  By default, Commvault software supports combined storage tier to store data in archive storage tiers.

  Commvault's combined storage tier stores a small portion of the frequently accessed indexing and metadata in the warm tiers, while storing a major portion of the actual data in the archive tiers, to provide a simplified, cheaper, and quicker data recalls when needed. For more information, see Combined Storage Tier.

- Archive Storage Tier

  Commvault also supports direct storage to the native archive cloud storage services provided by cloud vendors. For more information, see Archive Storage Tier.

  Archive storage tier defaults to combined storage tier.

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