| Patent application number | Description | Published |
|---|
| 20090006789 | COMPUTER PROGRAM PRODUCT AND A SYSTEM FOR A PRIORITY SCHEME FOR TRANSMITTING BLOCKS OF DATA - Provided are techniques for transmitting blocks of data. It is determined whether any high priority out of sync (HPOOS) indicator is set to indicate that a number of modified segments associated with a block of data are less than or equal to a modified segments threshold. In response to determining that at least one high priority out of sync indicator is set, one or more sub-blocks of data in the modified segments associated with the block of data and with one set high priority out of sync indicator are transferred. | 01-01-2009 |
| 20090064159 | SYSTEM AND METHOD FOR OPTIMIZING LOAD DISTRIBUTION ACROSS LOGICAL AND PHYSICAL RESOURCES IN A STORAGE SYSTEM - An apparatus, system and method to optimize load distribution across logical and physical resources in a storage system. An apparatus in accordance with the invention may include an availability module and an allocation module. The availability module may dynamically assign values to resources in a hierarchical tree structure. Each value may correspond to an availability parameter such as allocated volumes, current resource utilization, and historic resource utilization. The allocation module may serially process the values and allocate a load to a least busy resource in the hierarchical tree structure based on the assigned values. | 03-05-2009 |
| 20100049925 | EXECUTING HOST DATA TRANSFER OPERATIONS DURING SETUP OF COPY SERVICES OPERATIONS - Host input/output (I/O) operations are performed via a file stored in a non-volatile storage coupled to a storage controller while data structures are being generated in the storage controller to copy data from source logical volumes to target logical volumes. The source logical volumes and the target logical volumes are logical representations of physical storage maintained in a plurality of direct access storage devices. The contents of the file are transferred from the non-volatile storage to one or more of the plurality of direct access storage devices, after the data structures have been generated, wherein the host I/O operations are performed via the file while the contents of the file are being transferred to the one or more of the plurality of direct access storage devices. The host I/O operations to the plurality of direct access storage devices are resumed, in response to transferring entire contents of the file to the one or more of the plurality of direct access storage devices. | 02-25-2010 |
| 20100050008 | Estimating Power Consumption in a Computing Environment - A method for determining power consumption in a data storage system is provided. The method comprises determining data access patterns for at least a first storage device in a storage system based on operations performed by the first storage device; and calculating power consumption for the storage system by interpolating costs associated with the operations performed by the first storage device, wherein the cost associated with each operation is determined based on: (1) various levels of activities for the first storage device and a mix of workload characteristics, and (2) predetermined power consumption measurements obtained from one or more benchmarks for same operations performed by a second storage device in a test environment. | 02-25-2010 |
| 20100199050 | PROACTIVE TECHNIQUE FOR REDUCING OCCURRENCE OF LONG WRITE SERVICE TIME FOR A STORAGE DEVICE WITH A WRITE CACHE - Provided are techniques for introducing a delay in responding to host write requests. A percentage of fullness of a write cache is determined. Based on the determined percentage of fullness of the write cache (f), a low cache threshold (L), alpha (α), and k, an amount of delay to introduce into responding to a host write request is determined. Techniques wait the amount of the delay before responding to the host write request although the host write request processing has completed. | 08-05-2010 |
| Patent application number | Description | Published |
|---|
| 20090037662 | Method for Selectively Enabling and Disabling Read Caching in a Storage Subsystem - A mechanism for selectively disabling and enabling read caching based on past performance of the cache and current read/write requests. The system improves overall performance by using an autonomic algorithm to disable read caching for regions of backend disk storage (i.e., the backstore) that have had historically low cache hit ratios. The result is that more cache becomes available for workloads with larger hit ratios, and less time and machine cycles are spent searching the cache for data that is unlikely to be there. | 02-05-2009 |
| 20090240809 | THIN-PROVISIONING ADVISER FOR STORAGE DEVICES - A method, apparatus, and computer program product for thin-provisioning of storage in a storage system by an adviser is provided. A workload profile of the storage is created from performance data. The workload profile includes a measurement of changed data per a predetermined time and resource utilization data over a period of time. A capacity estimate is derived from the measurement of changed data per a predetermined time. A placement estimate is derived from the resource utilization data obtained over a period of time. A target capacity is recommended to a user based on the capacity estimate. A placement location is recommended to a user based on the placement estimate. A predicted resource utilization is provided to the user based on the capacity estimate or the placement estimate. | 09-24-2009 |
| 20100030956 | APPARATUS AND METHOD TO STORE ORIGINAL POINT-IN-TIME DATA - A method to store point-in-time data, comprising establishing a block size, providing source data storage comprising (S) blocks, and target data storage comprising (T) blocks. The method configures (B) source storage segments and (B) target storage segments, and receives updated point-in-time data for original point-in-time data written to an (i)th source storage segment. The method then determines if a (j)th target storage segment comprises available storage capacity to store the original point-in-time data. If a (j)th target storage segment comprises available storage capacity to store the original point-in-time data, the method writes the original point-in-time data to that (j)th target storage segment. | 02-04-2010 |
