摘要:
In one embodiment, pursuant to migrating the data from the first to the second storage medium, the data is allocated to the second storage medium while retaining an allocation of the data in the first storage medium. If the data is migrated from the second storage medium back to the first storage medium, the data is pointed to the allocation of the data in the first storage medium to alleviate data movement from the second storage medium to the first storage medium. If the allocation of the data in the first storage medium is determined to be needed for other data, the allocation of the data in the first storage medium is freed.
摘要:
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.
摘要:
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.
摘要:
A method for dynamic consistency group formation, in one embodiment, includes creating a snapshot of first data stored on a source storage system with respect to data content and data structure, copying the snapshot to a target storage system, detecting one or more write operations affecting data on the source storage system while copying the first data, detecting one or more collisions affecting the first data on the source storage system, wherein a collision occurs whenever the write operations affect the first data prior to the first data being written, setting a consistency group interval which represents an interval duration between successive snapshot create-and-copy events, and altering the consistency group interval to minimize collisions affecting data on at least one of the storage systems. Other methods for dynamic consistency group formation are also described.
摘要:
A method for concurrently converting a standard volume to a thin-provisioned volume includes initially establishing metadata for a thin-provisioned volume. The method then updates the metadata for the thin-provisioned volume to point to extents residing in a standard volume. The method then suspends I/O to metadata for the standard volume. Upon suspending the I/O, the method migrates control of the extents in the standard volume from a standard-volume control algorithm to a thin-provisioned-volume control algorithm. The method then resumes the I/O to the metadata for the thin-provisioned volume. Using this technique, standard volumes may be rapidly converted to thin-provisioned volumes while minimally disrupting I/O to the volumes. A corresponding apparatus and computer program product are also disclosed and claimed herein.
摘要:
A method for executing a software routine identified in a task object is provided. The method includes accessing a list of software routine identifiers associated with software routines that are executable on a computer server. The method further includes generating a task object generation command having at least a first software routine identifier, parameter data, and link task information and generating a second task object in response to the task object generation command. The second task object includes the first software routine identifier, the parameter data, and the link task information. The method further includes adding the second task object to a task execution queue on the computer server and executing the first software routine identified by the first software routine identifier in the second task object on the computer server to obtain at least a first result value, when the first flag value is a first predetermined value and the result parameter associated with the first task object corresponds to a second predetermined value.
摘要:
A system and method for implementing dynamic interfaces in a JAVA program including methods having a common implementation and other methods to be handled independently. The system comprises a first dynamic proxy object implementing an invocation handler for providing default implementations; a separate object providing implementations of any method in a defined interface that requires independent handling; and, a second dynamic proxy object provided for checking a method definition object for an implementation of the method, and in response, one of: invoking the method on the separate object if the implementation exists, and if the implementation does not exist, invoking the method on the first dynamic proxy object. The second dynamic proxy object thus allows for a single implementation for repetitive methods, while allowing special cases to be handled independently.
摘要:
Provided are a computer program product, system, and method for determining whether to extend a drain time to copy data blocks from a first storage to a second storage. A data structure is generated indicating data blocks in the first storage to copy to the second storage. A drain operation is initiated to copy the data blocks indicated in the first storage to the second storage for a drain time period. Write requests to the data blocks indicated in the data structure are queued during the drain time period, wherein the queued write requests are not completed while queued. Metric information based on the writes that occur to data blocks in the first storage are gathered during the drain time period; and in response to expiration of the drain time period, a determination is made from the gathered metric information of whether to continue the drain operation or terminate the drain operation.
摘要:
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.
摘要:
A method, system, and computer program product for providing dynamic context assistance to a user of a system, such as a storage system. One or more current command line interface (CLI) entries that are entered in a CLI of the system are received and a current state of the system is determined. Dynamic context assistance is then generated for one or more current CLI entries based on entered values of the one or more CLI entries. In this regard, the dynamic context assistance can be generated and displayed in a text or graphical form when one or more dynamic context assist keys are entered in the CLI in conjunction with the current CLI entry.