Abstract: An information processing apparatus determines, for each of packed objects recorded on one data-migration-source magnetic tape, whether or not to regenerate the packed objects by using objects included in the packed objects, generates a second packed object by using objects included in a first packed object determined as being regenerated, performs control of distributing and recording a plurality of second packed objects and parity data on a plurality of magnetic tapes, and performs control of recording a packed object determined as not being regenerated on a magnetic tape different from the data-migration-source magnetic tape.

Abstract: An information processing device selects, in a case where a plurality of pieces of data are collected and transmitted to a tape drive to be recorded on a magnetic tape, one mode of a first mode of transmitting a data group obtained by collecting the plurality of pieces of data without compression, to the tape drive, a second mode of transmitting a compressed data group in which the data group obtained by collecting the plurality of pieces of data is compressed, to the tape drive, or a third mode of transmitting a data group obtained by collecting a part of the plurality of pieces of data and remaining data, in which the part of the plurality of pieces of data is compressed and the remaining data is not compressed, to the tape drive, and transmits a data group generated in accordance with the selected mode, to the tape drive.

Abstract: An information processing device performs control to record deletion information indicating that an object with a designated object ID has been deleted, on a recording medium, in a case where a specific object ID is designated and an instruction to delete the object is input, for a magnetic tape on which an object that includes data and metadata related to the data and that is assigned an object ID as identification information is recorded, the object being assigned an object ID in a case where the object is updated different from an object ID of the object before the update.

Abstract: An information processing apparatus executes processing of making sizes of a plurality of pieces of data the same by adding dummy data to data other than data having a maximum size among the plurality of pieces of data, generates parity data based on the plurality of pieces of data to which the dummy data is added, and selects the magnetic tapes as recording destinations of the plurality of pieces of data and the parity data from the plurality of magnetic tapes such that a difference in a size of at least one of the dummy data or the parity data to be recorded on each of the plurality of magnetic tapes is minimized.

Abstract: An information processing apparatus reads definition information that is common to a plurality of magnetic tapes and defines a plurality of pieces of data included in archive data, generates the same number of pieces of the archive data as the number of the magnetic tapes based on the definition information, the archive data being obtained by grouping the plurality of pieces of data, and performs control of recording the plurality of pieces of generated archive data on the plurality of magnetic tapes in one-to-one correspondence.

Abstract: An information processing apparatus calculates, in a case of adding a new magnetic tape to a storage pool, the number of magnetic tapes to be added to the storage pool such that a free capacity of the storage pool after addition of the new magnetic tape is set to be equal to or larger than a capacity obtained by adding, to an assumed value of a total capacity of data to be recorded in the storage pool, an excess according to the number of pieces of parallel processing when recording data in the storage pool, the number being equal to or smaller than a number obtained by multiplying the number of magnetic tapes satisfying an insufficient capacity of the storage pool by the number of pieces of parallel processing, and performs control of adding the calculated number of new magnetic tapes to the storage pool.

Abstract: An information processing apparatus sequentially receives a first object list corresponding to a first prefix from each of a plurality of storage nodes, removes, in a case where a processed storage node exists, a second prefix held by the processed storage node from the first object list received from a storage node being processed, receives a second object list including objects of which the number is decreased by removal of the second prefix from the storage node being processed, and transmits, to a user terminal, an object list obtained by adding the second object list to the first object list from which the second prefix is removed.

Abstract: An information processing apparatus refers to a first variable in a case where an object saving instruction is received, sets a second variable to a value indicating that an object is being saved in a case where a state of a saving destination of an object is a normal state, refers to the second variable in a case where a deletion instruction of a saving destination of an object is received, sets the first variable to a value indicating that a state of the saving destination is a deletion start state and then refers to the second variable again in a case where an object is not being saved, responds that deletion of the saving destination is not possible in a case where an object is being saved.

Abstract: An information processing apparatus receives a first object list corresponding to a first prefix from each of a plurality of storage nodes, compares, for an object that has a delimiter at the end among objects included in each of the first object lists, a portion obtained by excluding the delimiter at the end with a second prefix included in the first object list received from the other storage node, and removes redundancy in a case where the portion obtained by excluding the delimiter at the end and the second prefix are redundant with each other and then transmits a second object list obtained by merging each of the first object lists to a user terminal.

Abstract: An information processing apparatus performs a control of recording identification information of a storage pool in at least one of a management area of a magnetic tape belonging to the storage pool or a recording medium other than a magnetic tape that is provided in a magnetic tape cartridge including the magnetic tape, the storage pool being included in a plurality of storage pools in which the same data is recorded by being multiplexed with a multiplicity of one or more, and the identification information being different for each storage pool in a pool group and being the same information between storage pools in pool groups different from each other according to a multiplexing order of the storage pool.

Abstract: A processor is configured to, in a case where a distribution rule is changed, issue an inquiry as to whether or not an object having same identification information as a received object is stored to at least one storage node as a distribution destination corresponding to a past distribution rule, in a case where a response indicating that the object having the same identification information as the received object is stored is made from any storage node, distribute the received object to the storage node storing the object having the same identification information as the received object, and in a case where the response indicating that the object having the same identification information as the received object is stored is not made from any storage node, distribute the received object to any of the plurality of storage nodes in accordance with a most recent distribution rule.

Abstract: An information processing apparatus includes at least one processor and distributes an object to be stored to any of a plurality of storage nodes in accordance with a distribution rule set in advance. The processor is configured to receive the object to be stored, specify a distribution rule to be applied based on a first part that is included in identification information of the received object and that is associated with the distribution rule, and distribute the received object to any of the plurality of storage nodes in accordance with the specified distribution rule.

Abstract: An information processing apparatus performs, in a case where the same data is recorded in each of a plurality of storage pools each of which includes a plurality of generations of magnetic tapes and each for which a priority representing a degree to which a relatively-new-generation magnetic tape is used with priority is set, control of recording data recorded in a relatively-old-generation magnetic tape of a storage pool of which the priority is relatively high, in a relatively-old-generation magnetic tape of a storage pool of which the priority is relatively low.

Abstract: An information processing apparatus determines a data migration timing of a magnetic tape as a data migration source based on a transition of information related to pieces of valid data included in a data group recorded in each of a plurality of the magnetic tapes, and performs control of migrating the pieces of valid data recorded in the magnetic tape as a data migration source to a magnetic tape as a data migration destination at the determined timing.

Abstract: An information processing apparatus performs control of recording data in a relatively-new-generation magnetic tape of at least one storage pool among a plurality of storage pools in a case where the same data is recorded in each of the plurality of storage pools each of which includes a plurality of generations of magnetic tapes.

Abstract: In a case of performing control of migrating data from a relatively-old-generation magnetic tape as a migration-source magnetic tape included in one storage pool of the plurality of storage pools to relatively-new-generation magnetic tapes as migration-destination magnetic tapes included in each of the plurality of storage pools, an information processing apparatus excludes, from migration targets, data recorded in a relatively-new-generation magnetic tape included in a storage pool to which the migration-destination magnetic tape belongs.

Abstract: An information processing apparatus performs first migration processing of migrating data from a relatively-old-generation magnetic tape included in one storage pool of a plurality of storage pools to relatively-new-generation magnetic tapes included in each of the plurality of storage pools in a case where a total value of free capacities of the relatively-new-generation magnetic tapes in each of the plurality of storage pools is equal to or larger than a threshold value, and performs second migration processing of migrating data from a plurality of migration-source magnetic tapes included in the storage pool to migration-destination magnetic tapes of which the number is smaller than the number of the migration-source magnetic tapes in a case where the total value is smaller than the threshold value.

Abstract: An information processing apparatus selects a magnetic tape as a data migration target from among a plurality of migration-source magnetic tapes based on an index value correlated with a read frequency of valid data recorded in the magnetic tape, the index value being calculated for each of the magnetic tapes, specifies valid data recorded in the selected magnetic tape, and performs control of migrating the valid data to a migration-destination magnetic tape.

Abstract: An information processing apparatus performs first migration processing of migrating data from a relatively-old-generation magnetic tape included in one storage pool of a plurality of storage pools to relatively-new-generation magnetic tapes included in each of the plurality of storage pools in a case where the number of tape drives which are available for data migration is equal to or larger than a threshold value, the tape drives being relatively-new-generation tape drives among a plurality of generations of tape drives, and performs second migration processing of migrating data from migration-source magnetic tapes as relatively-old-generation magnetic tapes included in the storage pool to migration-destination magnetic tapes of which the number is smaller than a multiplicity in a case where the number of the tape drives is smaller than the threshold value.

Abstract: An information processing device includes at least one processor. The processor performs, in a case where an address relative value between a first address value indicating an end position in a tape running direction of recorded data which is data recorded in a first partition of a magnetic tape having the first partition in which data is recorded and a second partition in which metadata corresponding to the data is recorded and a second address value indicating an end position in the tape running direction of latest metadata recorded in the second partition is within a predetermined range, control to record metadata corresponding to recorded data recorded after the latest metadata is recorded, in the second partition.