摘要:
Methods and apparatus are provided for dynamically compressing categories in a data storage library. In one embodiment, the method includes retrieving an identification of a first category in the data storage library, the first category being a last-compressed category. Next, an identification number of a first order of the first category is retrieved, the first order being a last compressed order. Compression is resumed of orders in the first category with an order next following the first order and continued with additional orders in the first category. If a predetermined amount of time has elapsed, the identification of the first category and the identification number of the order of the first category being compressed are stored. If, however, the predetermined amount of time has not elapsed and compression of the first category is complete, compression of a second category is begun.
摘要:
A method and apparatus for handling multi-volume datasets in a tape storage system are disclosed. In response to a write request for a multi-volume dataset, the information of the multi-volume dataset are captured by intercepting and deciphering a set of volume mount commands. Otherwise, the information of the multi-volume dataset are captured by snooping header information from a previous volume listed in a header of the multi-volume dataset. A chain of logical volume names that belongs to the multi-volume dataset is then built. Finally, the chain of logical volume names is then stored in a chain database.
摘要:
An apparatus, system, and method are disclosed for enforcing policy controls for non-system managed tape media. The apparatus includes an operating system configured to communicate with a tape media drive, and an identification module configured to identify a tape media type of a tape media cartridge. The apparatus may also include a policy module configured to maintain control policies for tape media types, and a media control module configured to enforce the control policies. The system includes a computing system having a processor, a cache, an operating system, and a plurality of input/output interfaces, a tape media drive coupled to the computing system, and the apparatus. The method includes communicating with a tape media drive, identifying a tape media type of a tape media cartridge, maintaining a plurality of control policies for tape media types, and enforcing the plurality of control policies.
摘要:
Device initialization of subsystems of a data storage library determines whether a subsystem is homogeneous, having common types of devices; or is heterogeneous, having mixed types of devices. Host names are provided for a subsystem in a predetermined format by concatenating the library name, the subsystem name, and a supplemental character; where the supplemental character is a non-defining character for a homogeneous subsystem. For naming purposes, a heterogeneous mixed device subsystem is partitioned into partitions of devices having common types of devices, each partition characterized as a separate homogeneous subsystem with a host name implementing the supplemental character as a defining character.
摘要:
An apparatus, system, and method are presented for scaling storage media to improve data access performance. A scaling module is provided and configured to receive a dataset, identify storage characteristics of the dataset, make a determination based upon user-defined storage criteria, and select a storage instruction. In one embodiment, the storage instruction is configured to scale the storage medium to a predefined capacity. The predefined capacity of the storage medium is configured to optimize data access performance. Alternatively, the storage instruction is configured to not scale the storage medium. Additionally, the present invention may be configured to map and track the storage medium while the dataset is being written to or read from the storage medium.
摘要:
An apparatus, system, and method are presented for utilizing tape storage media segmentation to improve data access performance. A segmented tape storage medium within a tape cartridge having a first and second segment is utilized. A selection module allows a user to select a user-defined capacity of the tape storage medium that is less than the usable capacity of the tape storage medium. The user-defined capacity allows the user to prefer improved data access over tape storage capacity. Data, when written to the tape, is written only within the user-defined capacity. Data may be written exclusively on the first segment or written on both the first segment and second segment allowing data access to be improved. In addition, the user-defined capacity may correspond to the full capacity of the tape storage media.