Policies

The following graphic shows file-status changes, including transitions of file entries between FSE HSM lists. The MinFileAge parameter is one of the configuration parameters for an FSE partition. It represents the period of time during which a file must be left intact to become a migration candidate.

Figure 25 Changes of states of files under FSE

Example scenario of migration and release

This example presents how the configured migration and release policies affect everyday work of FSE users.

1.An FSE user created a new file and saved it with a name myfile.doc. He then continued working on the file and updating it. Hierarchical Storage Manager (HSM) noticed the change and added myfile.doc to the dirty file list.

2.The user finished working on myfile.doc and closed it. After 10 minutes, the file was moved from the dirty file list to the migration candidate list.

The time interval of 10 minutes is defined by the parameter MinFileAge in the migration policy. It represents a period between the moment of the last file change and the moment when the file is put on the migration candidate list.

3.After 20 minutes myfile.doc was migrated to media, and moved from migration candidate list to the release candidate list.

The time interval of 20 minutes is defined by the parameter MaxWaitTime in the migration policy. It represents the maximum period of time between the moment when the first file is added to an empty migration candidate list and the moment when migration of files on the migration candidate list is started.

4.After the used capacity of the HSM file system exceeded 85%, HSM triggered a corresponding release process. myfile.doc was released together with other files on the release candidate list. Its status was set to offline.

The percentage of 85% is defined by the parameter HighWatermark in the release policy. It represents the percentage of used disk space on an HSM file system that triggers a release job.

FSE control over the files in use is based on user-defined policies. These are rules by which migration, release, and deletion jobs are executed. Each process requires its own policy, thus migration policy, release policy, and deletion policy. Each FSE partition has its own set of policies.

Different policies can be defined for individual FSE partitions, according to the partition’s purpose and the way it is used. Policies are defined in FSE partition configuration files as a series of parameters. These are read and used by the Hierarchical Storage Manager and the Partition Manager at startup (migration and

126 Migration, release, recall, and deletion

File System Extender (FSE) specifications

HP File System Extender (FSE) is a sophisticated solution designed to optimize data storage management for enterprises that deal with large volumes of unstructured data. This technology addresses the challenges of data growth and the need for effective data retention strategies, enabling organizations to store and manage their information more efficiently.

One of the main features of HP FSE is its ability to intelligently migrate data between primary and secondary storage. By utilizing policies that determine when to move infrequently accessed files to lower-cost storage environments, FSE helps reduce the strain on primary storage systems and saves on costs associated with high-performance storage solutions. This tiered approach to data management ensures that organizations can access the data they need quickly while still maintaining an efficient overall storage architecture.

Another notable characteristic of HP FSE is its seamless integration with existing storage infrastructures. The solution works with a variety of storage systems, allowing organizations to utilize their current investments without the need for significant changes to their infrastructure. This interoperability is powered by advanced technologies that facilitate data migration and retrieval, ensuring a smooth transition for organizations looking to optimize their storage strategies.

Additionally, HP FSE is equipped with robust reporting and analytics capabilities. This functionality provides organizations with insights into their storage usage, helping them understand data patterns and optimize their storage environments accordingly. By having visibility into which files are accessed most frequently and which are rarely used, organizations can make informed decisions on data retention policies and storage management.

Security is paramount in data management, and HP FSE addresses this concern by implementing advanced data protection features. This includes data encryption, secure access controls, and compliance with industry regulations, ensuring that sensitive information is safeguarded throughout its lifecycle.

Overall, HP File System Extender is a comprehensive data storage solution that combines intelligent data management, seamless integration, insightful analytics, and robust security features. By leveraging these capabilities, organizations can efficiently manage their unstructured data, lower costs, and enhance operational efficiency, making it an invaluable tool in today’s data-driven landscape.

HP File System Extender (FSE) manual Policies, Changes of states of files under FSE

Models: File System Extender (FSE)

Figure 25 Changes of states of files under FSE

Policies

File System Extender (FSE) specifications