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CHEYENNE
Cheyenne Hierarchical Storage Manager for UNIX offers full functionality network storage management including automatic file migration, library management and high-speed backup. Files are migrated transparently between magnetic and optical disk libraries to maximize performance, capacity, cost-effectiveness and ease of administration. Cheyenne HSM optimizes your storage resources by automatically and effectively assigning data to less expensive storage media. Whether you are using image processing and design automation (CAD, AEC, GIS), Computer-Aided Software Engineering (CASE), or multimedia databases, Cheyenne HSM satisfies your storage-intensive needs. Automatic Data ManagementThe data capacity of an optical disk presents a barrier for larger files or data sets. Cheyenne HSM overcomes this limitation by spanning the file across multiple disks and supporting file sizes limited only by your operating system. File Chunking is used to span media, even if the file is larger than your primary magnetic disk. HSM also tracks the activity level of each file. Magnetic disks serve as the active storage and contain files most recently created or accessed. When the volume of data on the active drive reaches a predetermined percentage of capacity set by the user, the least frequently accessed files are automatically moved to optical storage, while the file name remains in the directory on your hard disk.Flexible MigrationCheyenne HSM's automatic file migration system allows the network administrator to set parameters based on file usage. By doing so, HSM ultimately protects your primary storage from out of disk space conditions by immediately migrating data when the predetermined high-level watermark is reached. Thus, migration allows you to control your data transparently between magnetic and optical disk libraries. The file system "sees and accesses" all files, regardless of where they are stored, and makes them readily available to the user. Easily Accessible FilesIn a fully integrated UNIX-based network storage subsystem, files are accessed in the same manner as any other standard UNIX file system. The physical location of the files remains transparent to both the user and other file management software operating on the server. If the file is located on optical, the software locates it using a file directory maintained on magnetic, mounts the appropriate optical disk and retrieves the data, making it available to the user even as the file is being transferred to the hard disk. An optical file remains unchanged until it is modified on the hard disk. Retrieval from optical disks typically requires from five to fifteen seconds. Maximum PerformanceThe system is completely configurable and automated, so default settings installed with HSM for UNIX are easily adjusted to the settings you choose, optimizing both data storage resources and overall system performance. Default settings may be adjusted so that users, trying to access files stored anywhere on the server, require no special training. Using the standard command line interface, Cheyenne HSM for UNIX offers simple control of your storage management and file migration, while your data is centrally managed on storage devices. Cheyenne HSM also provides the ability to perform concurrent operations on multiple drives and libraries through resource sharing. Independent Data IntegrityMany optical storage systems are based on architectures that have a single point-of-failure. Optical storage data is dependent on the integrity of the magnetic media. If the hard drive crashes, the optical subsystem is rendered useless. The single point-of-failure architecture is unacceptable for today's mission-critical UNIX environments. Cheyenne HSM writes the file lookup tables to the optical disks, in standard UFS format, as well as the optical disks used by Cheyenne HSM, thus allowing your data to be read with standard UNIX utilities. In the event of hard disk failure, directories and nodes that point to data stored on an optical device can be reconstructed. Features/Benefits
System RequirementsHardware: Sun SPARC System |