Emc Corporation

Emc IP Holding Company LLC

Michael D Haynes

David Haase

Somnath A Gulve

Dennis Thomas Duprey

Miles Aram De Forest

Alan Lee Taylor

Nagapraveen Veeravenkata Seela

Paul Thomas McGrath

Dayanand Suldhal

Pawan Misra

Saurabh M Pathak

Chetan Rameshchandra Vaidya

Robert F Goudreau

Scott David Von Rhee

Walter A O'Brien, Iii

David W Harvey

Charles Christopher Bailey

Dean D Throop

Jackson Brandon Myers

Charles H Hopkins

Miles Aram DeForest

William Paul Hotle

Dipak Prasad

Anita I Bezera

Robert F Goudreau, Jr

A method is used in managing accesses to storage. An amount of data storage space in use by a mapped logical volume and RAID group characteristics of a storage pool used by the mapped logical volume are determined. Based on the amount and the RAID group characteristics, a report of storage resources corresponding to the mapped logical volume is produced. Based on the report, accesses to the mapped logical volume are controlled.

Managing accesses to storage

A method and system for use in managing data storage is disclosed. Data storage in a data storage system is managed. The data storage system comprises a first data storage tier and a second data storage tier configured such that the performance characteristics associated with one of the data storage tiers is superior to the other data storage tier. I/O activity is determined in connection with a data group stored on one of the first and second data storage tiers. It is determined whether to migrate the data group stored on the one of the first and second data storage tiers to the other data storage tier based on the performance characteristics associated with the other data storage tier and the determined I/O activity. The data group is migrated to the other data storage tier in response to determining to migrate the data group to the other data storage tier. The data group is processed in response to determining to migrate the data group to the other data storage tier such that fragmentation in connection with the data group is substantially reduced.

Managing data storage

A method is used for managing consistency groups in storage systems. A consistency group comprising multiple logical objects is created and multiple replicas of the consistency group are created. The consistency group is restored to one of the multiple replicas.

Restoring snapshots to consistency groups of mount points

A method, computer program product, and computing system for identifying a target storage device upon which a plurality of logical storage devices are to be defined. The target storage device includes a plurality of physical storage blocks. At least a first logical storage device and a second logical storage device are defined for mapping within the target storage device. Each of the first and second logical storage devices includes a plurality of logical storage slices. At least a portion of the logical storage slices for each of the first and second logical storage devices are non-sequentially mapped to at least a portion of the plurality of physical storage blocks included within the target storage device to generate an interlaced target storage device.

System and method for interleaving storage

A method is used in managing restore operations in storage systems. A state of a logical object is retrieved and a second logical object is placed in a pre-step mode. An instantaneous restore operation between the first logical object and the second logical object is performed. Changed data extents in the first logical object are identified. Data-less writes are sent to any identified extents in the first logical object.

Managing restore operations using data less writes

A method is used for managing snapshot mount points in storage systems. A request to resize a snapshot mount point is received and a file object associated with the snapshot mount point is retrieved. The file object is analyzed to determine a file attached to the snapshot mount point and a file ID is determined for an underlying file associated with the determined file. The file associated with the file ID is resized.

Resizing snapshot mount points

A method is used in managing accesses to storage objects. Access I/Os being directed to at least one storage object are received into a first queue that operates on a first in first out basis. In accordance with the first in first out basis, a batch of the access I/Os is created from the first queue. The batch is transferred to a second queue that is controlled by ordering logic. The batch in the second queue is ordered in accordance with the ordering logic. All of the access I/Os from the second queue are processed in order, before any additional access I/Os are added to the second queue.

Managing accesses to storage objects

Systems, methods, and computer readable medium for allocating physical storage in a disk array are disclosed. According to one aspect, the subject matter described herein includes a method for allocating portions of storage area of a storage array. The method includes receiving, from a requesting entity, a request for allocation of a portion of storage area of a storage array, the storage array comprising a plurality of storage entities and a plurality of data buses for transferring data to and from the plurality of storage entities, wherein the plurality of storage entities are organized into at least one logical unit, wherein each logical unit is subdivided into at least one slice. In response to receiving the request for allocation, at least one slice is selected for allocation for use by the requesting entity, based on anticipated system resource utilization during access to data to be stored in the storage array.

Methods, systems, and computer readable medium for allocating portions of physical storage in a storage array based on current or anticipated utilization of storage array resources

A method is used in managing consistency groups in storage systems. A consistency group is created from a set of snapshot mount points. A snapshot mount point is a logical object accessible for using a replica of a logical volume. An operation is performed on the consistency group.

Managing consistency groups in storage systems

A method, computer program product, and computing system for receiving an IO request from a host concerning an IO operation to be performed on a data array. The IO request is processed to generate an IO descriptor. The IO descriptor defines a unique and proprietary memory space for each of a plurality of IO processing routines.

System and method for managing IO operations

This invention is a system and method for managing sessions and memory resources used for replication of data in a data storage environment. In one embodiment, a methodology is provided that inspecting a plurality of copy sessions forming a copy session group operating in the data storage environment to determine the size and number of buffers each session is using, and determining whether to abort a session of the group and reallocate its buffers by redistributing its memory for use by itself and another session based on the inspection. In other embodiments, implementations include a system, a computer program product, or an apparatus, wherein each embodiment is configured for carrying out the steps involved in the methodology.

System and method for managing sessions and reallocating memory resources used for replication of data in a data storage environment

This invention is a system and method for managing the use of available bandwidth for a link used for movement of data being copied in a data storage environment.

System and method for managing use of available bandwidth for a link used for movement of data being copied in a data storage environment

This invention is a system and method related to restoring data in a data storage environment and includes program logic.

System and method for managing data associated with copying and recovery procedures in a data storage environment

A system and method related to maintaining consistency of replicated data in a data storage environment. The system handles Input/Output (IO)-Requests in a data storage environment having a server and production data stored on a data storage volume on a data storage system. A copy of the production data is stored on another data storage volume of a second data storage system, wherein IO-Requests to update production data are handled so that the data copy is consistent with the production data after processing the IO-Request.

System and method for handling device objects in a data storage environment for maintaining consistency during data replication

Methods, systems, and computer program products for preventing concurrent execution of conflicting software operations on the same and different storage processors while avoiding the deadlocks are disclosed. According to one method, first and second instances of a first software utility for respectively executing on the first and second storage processors having access to a storage medium are provided. First and second instances of the second software utility for respectively executing on the first and second storage processors are also provided. A lock is provided to instances of the first utility. The lock makes exclusive the operations of checking for an activity query from instances of the second utility and receiving a query from instances of the second utility. A first operation implemented by the first utility may fail if the activity query has been received when the checking occurs.

Methods, systems, and computer program products for preventing concurrent execution of conflicting software operations on the same and different storage processors having access to a common storage medium while avoiding deadlocks

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Raleigh, NC, United States of America

Michael D Haynes