If you access a file stored in a General-purpose NAS file system less than twice a month, you can use the lifecycle management feature to transfer the file to the lower-cost Infrequent Access (IA) storage medium. This topic describes the scenarios, benefits, and workflow of the IA storage medium.

Scenarios

  • Web content management

    Most content management systems, such as WordPress, FTP, and Internet Information Services (IIS) are used to upload and download data. In most cases, the backends of the content management systems are used to provide shared file storage. However, an increasing volume of data that is less frequently accessed may become cold data after a period of time. IA storage medium provides a cost-efficient storage solution for cold data in web content management.

  • Big data analysis

    IA storage medium provides a cost-efficient storage solution for large volumes of unstructured data, such as gene sequencing data, GIS data, bill image data, and audio recording data. IA storage medium also provides the same throughput as General-purpose NAS file systems.

  • Backup storage

    If you use General-purpose NAS file systems as the backup medium for databases such as MySQL, Redis, and MongoDB, IA storage medium provides a cost-efficient storage solution. You can also integrate General-purpose NAS file systems with Volume Shadow Copy Service (VSS) to back up Windows servers.

Benefits

  • Easy configuration: You do not need to write scripts or manually migrate cold data.

    After you configure a lifecycle management policy for a directory, the files that meet the policy are automatically transferred from the directory to the IA storage medium. You do not need to manually perform complex and risky data migration.

  • Lower cost: You can transfer cold data by file to a lower-cost storage medium .

    The file system automatically identifies cold data based on the lifecycle management policy and transfers the cold data at the earliest opportunity. Compared with archiving data by directory, the lifecycle management feature provides a finer-grained transfer to minimize your costs.

  • Instant access: You can access cold data without the need to modify the lifecycle management policy and manually migrate cold data from the IA storage medium to the General-purpose NAS file system.

    The files in the IA storage medium are still accessible if you do not modify the content or path of the files. You can access the files in the IA storage medium without the need to modify the lifecycle management policy or interrupt your business.

Workflow

Workflow of lifecycle managementThe workflow of lifecycle management includes the following steps:
  1. A lifecycle management policy (1 in the figure) is configured for a General-purpose NAS file system. For more information about how to configure a lifecycle management policy, see Manage lifecycle management policies.
  2. Based on the lifecycle management policy, the lifecycle management module checks for cold data in the specified directory at a regular interval. If cold data is found, it is transferred from the General-purpose NAS file system to the IA storage medium.
  3. When you attempt to access cold data, the cold data is cached from the IA storage medium to the General-purpose NAS file system (3 in the figure). The access latency of data in the IA storage medium is higher than that of data in the General-purpose NAS file system. However, after the data is cached in the General-purpose NAS file system, the access latency is the same as that of data in the General-purpose NAS file system.