Abstract: Provided are a computer program product, system, and method for managing write operations to an extent of tracks migrated between storage device. An operation to migrate an extent of tracks from the second storage to the first storage is processed. A determination is made of the tracks in the extent having a write indicator indicating that the track was updated in the second storage since the previous time. The data for the determined tracks is copied from the second storage to free locations in the first storage. An extent object for the extent is updated to indicate the free locations to which the data for the tracks were copied as an active address for the track.

Abstract: A headlamp of an embodiment of this invention includes a laser element, a light emitting section, and a parabolic mirror. A part of the parabolic mirror is provided so as to face an upper surface of the light emitting section, which upper surface has a larger area than that of a side surface of the light emitting section. The light emitting section emits fluorescence in such a manner that distribution of the fluorescence corresponds to the Lambertian distribution.

Abstract: A read/write ratio for each of a plurality of data segments classified in a hot category as hot data segments is determined. Each of the plurality of hot data segments is ordered by the read/write ratio in a descending order. Each of a plurality of available SSD devices is ordered by a remaining life expectancy in an ascending order. Those of the plurality of hot data segments are matched with those of the plurality of hot data segments with those of the plurality of available SSD devices such that a hot data segment having a higher read/write ratio is provided to an SSD device having a smaller remaining life expectancy than another hot data segment having a lower read/write ratio.

Abstract: A read/write ratio for each of a plurality of data segments classified in a hot category as hot data segments is determined. Each of the plurality of hot data segments is ordered by the read/write ratio in a descending order. Each of a plurality of available SSD devices is ordered by a remaining life expectancy in an ascending order. Those of the plurality of hot data segments are matched with those of the plurality of hot data segments with those of the plurality of available SSD devices such that a hot data segment having a higher read/write ratio is provided to an SSD device having a smaller remaining life expectancy than another hot data segment having a lower read/write ratio.

Abstract: A method for more effectively distributing the I/O workload in a data replication system is disclosed herein. In selected embodiments, such a method may include generating an I/O request and identifying a storage resource group associated with the I/O request. In the event the I/O request is associated with a first storage resource group, the I/O request may be directed to a first storage device and a copy of the I/O request may be mirrored from the first storage device to a second storage device. Alternatively, in the event the I/O request is associated with a second storage resource group, the I/O request may be directed to a second storage device and a copy of the I/O request may be mirrored from the second storage device to the first storage device.

Abstract: Provided are techniques for migrating a first extent, determining a spatial distance between the first extent and a second extent, determining a ratio of a profiling score of the second extent to the spatial distance, and, in response to determining that the ratio exceeds a threshold, migrating the second extent.

Abstract: Provided are a computer program product, system, and method for managing write operations to an extent of tracks migrated from a second storage to a first storage. An extent object exists if the extent was previously migrated from the first storage to the second storage at a previous time. In response to determining that the extent object exists, a determination is made of the tracks in the extent having a write indicator indicating that the track was updated in the second storage since the previous time. The data for the determined tracks is copied from the second storage to free locations in the first storage. For each determined track, the entry for the determined track in the extent object is updated to indicate the free location to which the data for the track was copied as an active address for the track.

Abstract: Exemplary method, system, and computer program embodiments for, in a data storage environment configured for synchronous replication between a primary and secondary pair of storage entities, each having tiered storage devices, extent migration are provided. In one embodiment, by way of example only, a migration instruction is sent, by the primary storage entity, to the secondary storage entity, the migration instruction including a relative priority based on a primary ordered heat map of the tiered storage devices of the primary storage entity. The relative priority is used against a secondary ordered heat map of the tiered storage devices of the secondary storage entity to perform the extent migration, regardless of whether the primary and secondary storage entities are identical.

Abstract: A method for data migration between each of a plurality of storage pools in a computing storage environment is provided. Each of the plurality of storage pools is categorized by a metric shared between data segments assigned to any one of the plurality of storage pools. The data segments are prioritized in the any one of the plurality of storage pools based on the metric. A discovery is performed for each of the plurality of storage pools, on a predetermined interval, based on the metric, whether a data segment with a highest priority on a child pool is greater than a data segment with a lowest priority on a parent pool. If so, the data segment with the highest priority on the child pool is promoted to the parent pool. A similar discovery process demotes the data segment with the highest priority on the parent pool to the child pool.

Abstract: An improved cemetery experience whereby the cemetery and accompanying facilities may celebrate and demonstrate the passion and hobbies of the deceased individual. The contemplated themed cemetery may be a stand-alone cemetery that celebrates a common passion of a plurality of individuals, yet still maintains the traditional burial and memorialization process. The themed cemetery may take a specific event, or commonly understood and loved location and memorialize that location in the theme of a cemetery where those with that common interest and enjoyment of the commonly understood location may desire to be buried. The cemetery would closely resemble both visually, and physically a replica of the theme being celebrated and may provide space for the deceased while still providing adequate income and revenue in the way of advertising for the operator.

Abstract: Extent migration is provided in a data storage environment configured for synchronous replication between a primary and secondary pair of storage entities, each having tiered storage devices. In one embodiment, by way of example only, a migration instruction is sent, by the primary storage entity, to the secondary storage entity, the migration instruction including a time delta approximately equal to a time of an intended migration at the primary storage entity adjusted for a transmission time such that the primary and secondary storage entities conduct the extent migration at approximately a same time.

Abstract: A method for managing extents in a data storage system includes monitoring usage statistics for an extent residing on one or more powered-up storage devices. In the event the extent has not been accessed for specified period of time (as determined from the usage statistics), the method automatically compresses the extent and migrates the extent to an intermediate repository. Once the amount of data in the intermediate repository reaches a specified level, the method migrates the extent from the intermediate repository to one or more normally powered-down storage devices. If I/O is received for the extent while it resides in the normally powered-down storage devices or the intermediate repository, the method automatically migrates the extent from the normally powered-down storage devices or the intermediate repository to the normally powered-up storage devices. A corresponding apparatus and computer program product are also disclosed.

Abstract: A method for migrating extents between extent pools in a tiered storage architecture maintains a data access profile for an extent over a period of time. Using the data access profile, the method generates an extent profile graph that predicts data access rates for the extent into the future. The slope of the extent profile graph is calculated and used to determine whether the extent will reach a migration threshold within a specified “look-ahead” time. If so, the method calculates a migration window that allows the extent to be migrated prior to reaching the migration threshold. In certain embodiments, the method determines the overall performance impact on the source extent pool and destination extent pool during the migration window. If the overall performance impact is below a designated impact threshold, the method migrates the extent during the migration window. A corresponding apparatus and computer program product are also disclosed herein.

Abstract: A method for migrating extents between extent pools in a tiered storage architecture maintains a data access profile for an extent over a period of time. Using the data access profile, the method generates an extent profile graph that predicts data access rates for the extent into the future. The slope of the extent profile graph is calculated and used to determine whether the extent will reach a migration threshold within a specified “look-ahead” time. If so, the method calculates a migration window that allows the extent to be migrated prior to reaching the migration threshold. In certain embodiments, the method determines the overall performance impact on the source extent pool and destination extent pool during the migration window. If the overall performance impact is below a designated impact threshold, the method migrates the extent during the migration window.

Abstract: A method for scheduling the migration of extents between extent pools of a storage system is disclosed herein. In certain embodiments, such a method includes periodically profiling an extent pool to generate a historical data access profile of the extent pool. Using this historical data access profile, the method determines an optimal migration window for migrating an extent to the extent pool. The method then identifies an actual extent for migration to the extent pool. Once the actual extent is identified, the method schedules the extent for migration to the extent pool during the optimal migration window. A corresponding apparatus and computer program product are also disclosed herein.

Abstract: A method for more effectively distributing the I/O workload in a data replication system is disclosed herein. In selected embodiments, such a method may include generating an I/O request and identifying a storage resource group associated with the I/O request. In the event the I/O request is associated with a first storage resource group, the I/O request may be directed to a first storage device and a copy of the I/O request may be mirrored from the first storage device to a second storage device. Alternatively, in the event the I/O request is associated with a second storage resource group, the I/O request may be directed to a second storage device and a copy of the I/O request may be mirrored from the second storage device to the first storage device.

Abstract: Extent migration is provided in a data storage environment configured for synchronous replication between a primary and secondary pair of storage entities, each having tiered storage devices. In one embodiment, by way of example only, a migration instruction is sent, by the primary storage entity, to the secondary storage entity, the migration instruction including a time delta approximately equal to a time of an intended migration at the primary storage entity adjusted for a transmission time such that the primary and secondary storage entities conduct the extent migration at approximately a same time.

Abstract: Provided are a method, system, and computer program product for using a migration cache to cache tracks during migration. In response to a migration operation, a determination is made of a first set of tracks in the source storage indicated in an extent list and of a second set of tracks in the extent. The tracks in the source storage in the first set are copied to a migration cache. The tracks in the second set are copied directly from the source storage to the destination storage without buffering in the migration cache. The tracks in the first set are copied from the migration cache to the destination storage. The migration operation is completed in response to copying the first set of tracks from the migration cache to the destination storage and copying the second set of tracks from the source storage to the destination storage.

Abstract: A method for managing extents in a data storage system includes monitoring usage statistics for an extent residing on one or more powered-up storage devices. In the event the extent has not been accessed for specified period of time (as determined from the usage statistics), the method automatically compresses the extent and migrates the extent to an intermediate repository. Once the amount of data in the intermediate repository reaches a specified level, the method migrates the extent from the intermediate repository to one or more normally powered-down storage devices. If I/O is received for the extent while it resides in the normally powered-down storage devices or the intermediate repository, the method automatically migrates the extent from the normally powered-down storage devices or the intermediate repository to the normally powered-up storage devices. A corresponding apparatus and computer program product are also disclosed.

Abstract: Extent migration is provided in a data storage environment configured for synchronous replication between a primary and secondary pair of storage entities, each having tiered storage devices In one embodiment, by way of example only, a migration instruction is sent, by the primary storage entity, to the secondary storage entity, the migration instruction including a relative priority based on a primary ordered heat map of the tiered storage devices of the primary storage entity. The relative priority is used against a secondary ordered heat map of the tiered storage devices of the secondary storage entity to perform the extent migration, regardless of whether the primary and secondary storage entities are identical.