Emc IP Holding Company LLC

Emc Corporation

Michael Trachtman

Assaf Natanzon

Yossef Saad

Bradford B Glade

Steven Richard Bromling

Salvatore DeSimone

Brian Lake

Joshua Baergen

Sumeet K Malhotra

Eugene Ortenberg

In a half-compressed RAID 1 system a first copy of a data set is maintained in an uncompressed state and a second copy of the data set is maintained in a compressed state, where corresponding compressed and uncompressed blocks are stored on different physical devices. The result is RAID 1 reliability with storage space consumption similar to RAID 5-3+1. Compression striping in which the compressed and uncompressed data is distributed across two or more storage devices can be used to reduce data access response time. Further, delayed compression can be used to reduce the time required to perform WRITE ops. Compression may also be performed based on resource availability or storage tier hierarchy.

RAID 1&#x2014;half compressed data storage

Techniques and mechanisms for establishing quorums on an object-by-object basis; e.g., by associating quorum schemes, quorum-eligibility groups and/or quorum rules with objects on an object-by-object basis. For example, a certain quorum scheme may be associated with one object in a system and a different quorum scheme may be associated with another object in the system. A management system may be configured to be part of a quorum-eligibility group of an object based on any of a variety of factors, including any of: the number of management systems in the system, the quorum rule to be employed; whether an instance of the object is stored in a same fault domain of at least one of the management systems that are members of the quorum scheme; and the desire to maintain high availability of the object in response to various failure scenarios.

Establishing quorums on an object-by-object basis within a management system

A method, computer program product, and computing system for defining a first object within a computer-based system using a first user interface. The first object is associated with the first user interface. A second object is defined within the computer-based system using a second user interface. The second object is associated with the second user interface.

Storage management system and method

A method, computer program product, and computing system for receiving a key indicator and an encrypted password concerning an electronic device to be accessed. The key indicator may be processed to identify a decryption key. The encrypted password may be processed with the decryption key to generate a decrypted password.

Password identification system and method

A method, computer program product, and computing system for receiving a read request from a computing device for content stored in a storage system. The storage system is a mirrored storage system that includes a plurality of backend storage targets that each contain a copy of the content. The content is requested from each of the plurality of backend storage targets. The content is obtained from a first responding backend storage target, chosen from the plurality of backend storage targets, thus defining obtained content. The obtained content is provided to the computing device that provided the read request.

Data retrieval system and method

A technique controls movement of a logical unit of storage (LUN) among computerized storage. The technique involves selecting, by processing circuitry, a set of target storage locations of the computerized storage. The technique further involves performing, by the processing circuitry, performance evaluation operations on each target storage location of the selected set of target storage locations. The performance evaluation operations performed on each target storage location electronically assess a performance outcome of moving a production LUN from a source storage location of the computerized storage to that target storage location. The technique further involves moving, by the processing circuitry, the production LUN from the source storage location to a particular target storage location of the selected set of target storage locations based on a set of electronic performance assessments resulting from the performance evaluation operations performed on each target storage location.

Storage performance testing to evaluate moving data among arrays

A method, computer program product, and computing system for defining at least a portion of a storage system as a data storage space. A rate limit is assigned to the data storage space, thus defining a default rate limit. Operations performed on objects within the data storage space are compared to determine if the default rate limit is exceeded. If the default rate limit is exceeded, one or more remedial actions are implemented concerning the operations performed on objects within the data storage space.

A method, computer program product, and computing system for identifying a data portion for relocation from a first storage device to a second storage device. The data portion is migrated from the first storage device to the second storage device. A read request is received on the second storage device for specific data included within the data portion. The specific data is not present in a backend cache system associated with the second storage device. The specific data is requested from the second storage device and a backend cache system associated with the first storage device.

A technique controls access to a computerized resource of a mobile device (e.g., a smart phone, a tablet, etc.). The technique involves, in response to successfully authenticating a user, unlocking access to the computerized resource of the mobile device and starting a timer which is configured to lock access to the computerized resource of the mobile device upon timer expiration. The technique further involves, after the timer is started and while access to the computerized resource of the mobile device is unlocked, receiving a sensor signal from sensor circuitry. The sensor signal indicates whether the mobile device is in a vehicle that is currently moving. The technique further involves, in response to the sensor signal indicating that the mobile device is in a vehicle that is currently moving, restarting the timer which is configured to lock access to the computerized resource of the mobile device upon timer expiration.

Controlling access to a computerized resource of a mobile device based on whether the mobile device is within a vehicle that is currently moving

A technique controls access to a computerized resource of a mobile device (e.g., a smart phone, a tablet, a laptop computer, etc.). The technique involves sensing, by processing circuitry, a set of environmental factors from a particular environment of the mobile device when the mobile device unlocks the computerized resource in response to successful authentication of a user. The technique further involves selecting, by the processing circuitry, an expiration time based on the set of environmental factors. The technique further involves configuring, by the processing circuitry, an inactivity timer to re-lock access to the computerized resource of the mobile device when the inactivity timer identifies a time period of mobile device inactivity that reaches the selected expiration time. Along these lines, this time period may be relatively long in a trusted environment (e.g., an hour, several hours, etc.), but relatively short in an untrusted environment (e.g., a few minutes).

Varying the amount of time that a mobile device must be inactive before the mobile device re-locks access to a computerized resource

A technique evaluates moving a logical unit of storage (LUN). The technique involves adding, while a host accesses a production LUN on a source array, a test LUN on a target array. The technique further involves duplicating host input/output (I/O) requests from the host to form a first set of the host I/O requests for processing on the production LUN on the source array and a second set of the host I/O requests for processing simultaneously on the test LUN on the target array. The technique further involves performing, while the first set of the host I/O requests are processed on the production LUN and the second set of the host I/O requests are processed simultaneously on the test LUN, a performance evaluation on the target array to assess a performance outcome of moving the production LUN from the source array to the target array.

Described are techniques for processing I/O operations. A read operation is received that is directed to a first location of a logical device. Data stored at the first location of the logical device is replicated on a plurality of data storage systems. In accordance with one or more criteria, a set of at least one of the plurality of data storage systems is determined. The one or more criteria include information describing current configuration options of the plurality of data storage systems affecting I/O operation performance. The read operation is sent to each data storage system of the set.

Techniques for optimizing I/O operations

A method, computer program product, and computing system for defining an IO splitter module within each of a plurality of nodes included within a hyper-converged storage environment. A coherency module is defined on at least one of the plurality of nodes. A data request is received.

Data coherency system and method

A method, computer program product, and computing system for identifying a data portion having temporally-variable utilization. A utilization schedule is defined for the data portion, wherein the utilization schedule defines at least one high-utilization temporal period and at least one low-utilization temporal period. The data portion is accessed through a higher-performance storage system during the high-utilization temporal period. The data portion is accessed through a lower-performance storage system during the low-utilization temporal period.

In a distributed storage system in which a first copy of a set of data such as a virtualized LUN is maintained by a first site, and a second copy is maintained by a second site, access is provided to both the first site and the second site during loss of communication between the first site and the second site. Affinity determines access privileges for each site, where affinity is an indication that a particular site has or should be given permission to perform an operation to a particular part of the data set. Affinities can be specified such that permissions are non-overlapping, or overlap in a manner which is acceptable and resolvable.

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Michael Trachtman