Emc IP Holding Company LLC

Emc Corporation

Norman Speciner

James Odis Pendergraft

Rajesh Gandhi

Amitava Roy

Daniel Stanton Keefe

Bruce Rabe

Xuan Tang

Yue Zhao

Dazhi Dong

Lorenzo Bailey

Binhua Lu

Hongxin Zhang

Jeegn Chen

Chen Zhang

Ying Xie

Xiaogang Wang

Xing Chen

Ken Kim

Shyamsunder Singaraju

Robert Andrew Foulks

Amit Roy

Peter Wang

Chaoming Liu

A method, computer program product, and computing system for determining, at the computing device, one or more dependencies associated with a plurality of managed objects and a plurality of backend objects. One or more backend notifications associated with one or more backend objects of the plurality of backend objects may be received. One or more managed objects of the plurality of managed objects associated with the one or more backend objects of the one or more backend notifications may be identified, based upon, at least in part, the one or more dependencies associated with the plurality of managed objects and the plurality of backend objects. The one or more identified managed objects of the plurality of managed objects may be updated based upon, at least in part, the one or more backend notifications.

Data management system and method

Techniques are disclosed for managing access to shared computing resources in a computing system which include representing resources as objects and managing access to those objects using the construct of a resource instance manager. A set of resource instance managers responds to all commands requesting access to a set of respective shared resources. Access to each shared resource is managed by a unique resource instance manager for that resource which maintains a consistent state for that shared resource. Each resource instance manager determines, in response to receiving requests to allow execution of commands and using a set of predefined rues, whether those commands may be safely executed concurrently with other commands acting on the same shared resource. If the commands cannot be executed concurrently, the resource instance managers change the order in which queued commands are executed or abort execution of one or more commands.

Dynamic management of concurrent access to shared computing resources

Techniques are disclosed for provided automatic fault tolerance in data storage systems and other computer systems managing access to shared computing resources using the construct of a resource instance manager together with an architecture for designing and implementing task-oriented state-based commands for accessing the shared computing resources. A set of resource instance managers respond to all commands requesting access to a set of respective shared resources. Access to each shared resource is managed by a unique resource instance manager for that resource which maintains a consistent state for that shared resource. When commands are designed appropriately, the system can be restored using a system state history maintained transparently by a system-provided application program interface.

Automatic fault tolerance in a computing system providing concurrent access to shared computing resource objects

Described are techniques for processing requests. A profile is recorded comprising a plurality of prior requests from a client to a server. The plurality of prior requests associated with first data. A cached copy of the first data is stored in a cache of the server. A quality of service associated with the received request is determined for affecting when the update is applied to the cached copy of first data. The quality of service associated with the received request is dependent on the prior requests in the profile. The first update is applied to the first data. In accordance with the quality of service, the first update is applied to the cached copy of the first data.

Techniques for cache updates based on quality of service

Described are techniques for performing system management. A first policy definition of a first policy is received. The first policy definition includes information identifying a first criterion, a first resource of the system, and a first action to be taken. It is determined whether a condition of the first policy is met. The condition includes the first criterion. Responsive to determining that the condition is met, first processing is performed that includes performing the first action.

Policy based system management

Techniques are disclosed for managing access to shared computing resources in a computing system which include representing resources as objects and managing access to those objects using the construct of a resource instance manager. A set of resource instance managers respond to all commands requesting access to a set of respective shared resources. Access to each shared resource is managed by a unique resource instance manager for that resource which maintains a consistent state for that shared resource. When commands are designed according to an appropriate model and processed by a set of resource instance managers disclosed herein, multiple processes may execute in parallel without causing deadlocks or introducing data corruption.

Providing concurrent access to shared computing resources by interleaving commands and maintaining a consistent object state

A data storage system includes storage processors that execute respective datapath components and management components. The datapath components maintain logical storage objects being the target of the storage I/O commands and for which underlying data is stored on an array of storage devices. The management components operate in an active-standby fashion in which (1) the management components maintain respective separate copies of a management database storing information about the logical storage objects, (2) an active management component serves external requests from a storage administrator by accessing its copy of the management database, and (3) a standby management component responds to non-availability of the first management component by becoming the active management component and serving subsequent external requests from the storage administrator by accessing its copy of the management database. Failover speed is increased due to the standby management component maintaining a current copy of the management database.

Data storage system with active-standby system management

The subject disclosure is generally directed towards caching property values in a sparse cache for use in translating notifications to contain property values related to a source instance, e.g., for use in SMI-S compliant notifications (deletion indications). When a deletion indication translation needs properties that are unavailable in the current source instance, a cache is accessed to obtain the previous related property values. The deletion indication is translated based upon the related property values, and output, e.g., as a translated deletion indication to a client subscriber.

Deletion indication implementation based on internal model

The subject disclosure is generally directed towards caching property values in a sparse cache for use in translating notifications to contain previous and source property values, e.g., for use in SMI-S compliant notifications (modification indications). When a modification indication that needs a previous instance and source instance, but only the source instance is available, a cache is accessed to obtain the previous property value. The modification indication is translated to contain the previous and source instance, and output, e.g., to a client subscriber. The cache is updated with the property values of the source instance in anticipation of being needed for a subsequent modification indication of that property.

Modification indication implementation based on internal model

Described are techniques for processing requests. A request is received at a server from a client to apply a first update to first data. A cached copy of the first data is stored in a cache of the server. A quality of service is associated with the request. The quality of service affects when the first update is applied to the cached copy of the first data. The first update is applied to the first data. In accordance with the quality of service, the first update is applied to the cached copy of the first data.

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Medway, MA, United States of America

Norman Speciner