Patent application number | Description | Published |
20110191540 | PROCESSING READ AND WRITE REQUESTS IN A STORAGE CONTROLLER - Provided are a method, system, and computer program product for processing read and write requests in a storage controller. A host adaptor in the storage controller receives a write request from a host system for a storage address in a storage device. The host adaptor sends write information indicating the storage address updated by the write request to a device adaptor in the storage controller. The host adaptor writes the write data to a cache in the storage controller. The device adaptor indicates the storage address indicated in the write information to a modified storage address list stored in the device adaptor, wherein the modified storage address list indicates modified data in the cache for storage addresses in the storage device. | 08-04-2011 |
20120047287 | USING INFORMATION ON INPUT/OUTPUT (I/O) SIZES OF ACCESSES TO AN EXTENT TO DETERMINE A TYPE OF STORAGE DEVICE FOR THE EXTENT - Provided are a method, system, and computer program product for using information on Input/Output (I/O) sizes of accesses to an extent to determine a type of storage device for the extent from a plurality of storage devices comprising at least one of a first storage type and a second storage type. Performance information is processed for a time period for Input/Output (I/O) operations with respect to an extent maintained in at least one of the storage devices of the first storage type, wherein the performance information indicates an I/O size of the I/O operations with respect to the extent. A determination is made as to whether characteristics of the I/O operations other than I/O size indicate that the extent is eligible for migration to at least one of the storage devices of the second storage type. A determination is made as to whether characteristics of the I/O sizes of the I/O operations. A determination is made as to whether the characteristics of the I/O sizes of the I/O operations indicate that the extent should be migrated from the at least one storage device of the first storage type to at least one of the storage devices of the second storage type. The extent is migrated from one of the storage devices of the first type to at least one of the storage devices of the second type in response in response to determining that the extent is eligible for migration and that the characteristics of the I/O sizes indicate that the extent should be migrated. | 02-23-2012 |
20140215163 | PROCESSING READ AND WRITE REQUESTS IN A STORAGE CONTROLLER - Provided are a method, system, and computer program product for processing read and write requests in a storage controller. A host adaptor in the storage controller receives a write request from a host system for a storage address in a storage device. The host adaptor sends write information indicating the storage address updated by the write request to a device adaptor in the storage controller. The host adaptor writes the write data to a cache in the storage controller. The device adaptor indicates the storage address indicated in the write information to a modified storage address list stored in the device adaptor, wherein the modified storage address list indicates modified data in the cache for storage addresses in the storage device. | 07-31-2014 |
20140351505 | PROVIDING DATA ATTRIBUTES TO A STORAGE MANAGER TO USE TO SELECT A STORAGE TIER TO USE FOR A DATA SET MANAGEMENT OPERATION - Provided are a computer program product, system, and method for an application to provide data attributes to a storage manager to use to select a storage tier to use for a data set management operation. Each storage tier has storage devices with different storage attributes. The application determines data attributes of a data set for which a data set management operation is to be performed based on an application intended usage of the data set. The application sends the determined data attributes and a data set management command to the storage controller to cause the storage controller to use the determined data attributes to select one of the storage tiers of storage devices for performing the data set management operation specified by the data set management command. | 11-27-2014 |
20140351515 | PROVIDING DATA ATTRIBUTES TO A STORAGE MANAGER TO USE TO SELECT A STORAGE TIER TO USE FOR A DATA SET MANAGEMENT OPERATION - Provided are a computer program product, system, and method for an application to provide data attributes to a storage manager to use to select a storage tier to use for a data set management operation. Each storage tier has storage devices with different storage attributes. The storage manager receives information on data attributes for one of the data sets for which a data set management operation is to be performed for an application, wherein the data attributes are based on the application intended usage of the data set and receives a data set management command to perform the data set management operation. The storage manager selects one of the storage tiers having storage attributes that map to the data attributes and performs the data set management operation with respect to the selected storage tier. | 11-27-2014 |
20150039717 | CACHE MIGRATION MANAGEMENT IN A VIRTUALIZED DISTRIBUTED COMPUTING SYSTEM - In accordance with one aspect of the present description, in response to a detection by a storage controller, of an operation by a host relating to migration of input/output operations from one host to another, a cache server of a storage controller, transmits to a target cache client of the target host, a cache map of the source cache of the source host wherein the cache map identifies locations of a portion of the storage cached in the source cache. In response, the cache client of the target host, may populate the target cache of the target host with data from the locations of the portion of the storage, as identified by the cache map transmitted by the cache server, which may reduce cache warming time. Other features or advantages may be realized in addition to or instead of those described herein, depending upon the particular application. | 02-05-2015 |
20150205525 | FINE-GRAINED DATA REORGANIZATION IN TIERED STORAGE ARCHITECTURES - A method for organizing data at levels of granularity larger or smaller than an extent is disclosed. The method initially closes a dataset on a host system. The host system includes a mapping table storing a logical address of the dataset. When the dataset is closed, the host system generates a message indicating that the dataset has been closed and sends the message to a storage system storing the dataset. In response, the storage system allocates a new logical address and copies the dataset from the existing logical address to the new logical address to improve data placement. The storage system then returns the new logical address to the host system so that the host system can update its mapping table. A corresponding system and computer program product are also disclosed. | 07-23-2015 |
20150205689 | CONFLICT MANAGEMENT FOR APPLICATION DIRECTED DATA PLACEMENT IN STORAGE ENVIRONMENTS - A storage controller receives hints provided by one or more applications over a period of time, wherein the hints are used by the storage controller for organizing data in storage managed by the storage controller. Data on conflicts caused by the provided hints are collected over the period of time. Based on the collected data on the conflicts, one or more conflict avoidance rules are executed to reduce possibility of future conflicts. | 07-23-2015 |