Emc Corporation

Emc IP Holding Company LLC

Other

Memverge, Inc.

Yuanjie Wu

Subbulakshmi Premkumar

James F Britton

Russell R Laporte

Sriram Krishnan

Krishnakumar Subramanian

Pradyumna Revur

Yue Zhao

Peiyu Zhuang

Robert W Beauchamp

Jie Yu

Yue Li

Ning Xu

Jiajie Sun

Xiao Hua Fan

RongZhang Wu

Brian K Robideau

Hao Sun

James Odis Pendergraft

Dazhi Dong

Xiaogang Wang

Kunwu Huang

Qin Tao

Jichao Zhang

Hui Gao

Xiaohua Fan

Chun Wei

Feng Yin

Rongzhang Wu

Yiyang Zhang

Harbee Huijing Wang

Disclosed herein is an apparatus and method for a naming service in a distributed memory object system. In one embodiment, a name service method includes electing a primary node for the master key value store from a plurality of name service nodes, the primary node to receive master key value requests, a master key value store containing an entry for each directory within the distributed memory object, wherein the master key value store is configured for associating a directory pathname to a uniform unique identifier, and replicating the master key value store across the plurality of name service nodes. In another embodiment, a name service computing device includes a primary node for the master key value store, wherein the primary node is selected from a plurality of name service nodes and is configured to receive master key value requests, a master key value store containing an entry for each directory within the distributed memory object, wherein the master key value store is configured to associate a directory pathname to a uniform unique identifier, and the system further being in communication with the plurality of name service nodes, wherein the master key value store is replicated across the plurality of name service nodes.

Naming service in a distributed memory object architecture

A method, computer program product, and computing system for receiving an inquiry for a storage system from a user, wherein the inquiry concerns one or more resources/properties of the storage system. The inquiry is processed to identify one or more unavailability errors, wherein an unavailability error occurs when a resource/property identified within the inquiry is unavailable on the storage system. A database is queried to obtain information on the one or more resources/properties of the storage system, thus generating a search result. The search result is filtered to remove information corresponding to the one or more unavailability errors.

Querying system and method

The current disclosure is directed towards providing methods and systems enabling a plurality of key-value stores to be persisted within a single direct access memory space comprising persistent memory, and further enabling a single key-value store to be implemented via a plurality of memory spaces. In one embodiment, a method comprising: creating a first create-key-value-store operation-performed entry in a global log persisted within a first memory space; allocating a first key-value store name and a first key-value store root address within a second memory space; persisting the first key-value store name and the first key-value store root address within a first local log of the second memory space; updating the global log of the first memory space to include the first key-value store name and the first key-value store root address; and adding the first key-value store name and the first key-value store root address to a meta key-value store.

Persistent memory key-value store in a distributed memory architecture

Described are techniques for processing a request from a client for performing an operation that is received by a business logic provider. First processing is performed by the business logic provider to process the request that includes communicating with other providers for information in connection with the request, performing validation processing using the information obtained from the other providers to determine whether one or more restrictions are violated, each of said one or more restrictions identifying a required state of one or more objects for performing an operation of the request, determining whether any restrictions are violated, and performing one or more actions responsive to determining that any restrictions are violated.

Techniques for performing data validation

Described are methods, systems, and apparatus for communicating the status of storage pool job status between storage processors. A storage pool command is received by the secondary storage processor. The storage pool command is provided, by the secondary storage processor, to the primary storage processor. A storage pool job based on the storage pool command is created by the primary storage processor. The storage pool job is submitted, by the primary storage processor, to a job execution engine, for execution. A storage pool job submission notification is provided, by the primary storage processor, to the secondary storage processor. A storage pool job execution acknowledgement is provided, by the primary storage processor, to the secondary storage processor. The storage pool job is executed by the primary storage processor. One or more storage pool job status notifications are provided, by the primary storage processor, to the secondary storage processor.

Inter-storage processor storage pool job status communication

A method of verifying that a storage system is complying with best practices guide includes a software program running in host servers for determining the host server configuration parameters, and comparing the host server configuration to the storage system configuration. If a newly added best practices rule is found to be different than either the current configuration of the storage system or the host server configuration, then an alert may be generated, and sent to a storage system user or manager. In addition, a suggested change notice may be generated and transmitted to the storage system user or manager. There may also be a suggested change notice sent to the host server. Best practices rules may be stored in a data base and updated frequently.

Host oriented automatic verification of best practices

Described are techniques for processing a request from a client. Validation processing is performed to determine whether any restrictions are violated. With respect to two associated objects for a logical device and its snapshot, a business logical provider may perform runtime checks regarding the two associated objects of the same or different frameworks to ensure a valid state exists with respect to the requested operation on the two associated objects. For example, the request may be to restore a logical device to its previous snapshot and the restrictions may indicate to not perform the restore if the logical device is in an active mirroring relationship, a source of an active migration, or if the snapshot has expired. The request may be to destroy the logical device which is included in a consistency group and a restriction indicates that a logical device included in a consistency group may not be destroyed.

Described are methods, systems, and apparatus for reducing storage system polling when collecting and providing storage system state data. A plurality of poll requests for storage system state data is received. For each poll request of the plurality of poll requests, a poll request arrival time associated with the poll request is stored. A first poll is initiated to collect first storage system state data for a first poll request of the plurality of poll requests. A first poll start time associated with the first poll is stored. The first poll is completed, forming the first storage system state data. For each poll request of the plurality of poll requests, the first storage system state data is provided for the poll request provided that the poll request arrival time is before the first poll start time.

Storage system polling reduction

Described are techniques for processing a request received at a business logic provider from a client. The request includes a snapshot identifier uniquely identifying a snapshot having a snapshot object in a first data model and requests properties of a storage device providing a data source for the snapshot identified by the snapshot identifier. The snapshot object is requested from, and returned by, a snapshot provider. The business logic provider requests, from a storage device provider using a first property of the snapshot object, a storage device object corresponding to the storage device identified by the first property. The storage device provider returns the storage device object to the business logic provider. The storage device object is then returned to the client.

Techniques using associated object properties

A method for use in viewing compression and migration status is disclosed. A logical volume is selected for compression into a compressed logical volume. A destination storage pool for the compressed logical volume is selected. The logical volume is compressed during migration of the logical volume to the destination pool. Unified status information of progress of the compression and migration is presented. A system for use in viewing compression and migration status is also disclosed.

Viewing compression and migration status

A method is provided within a storage processor of a data storage system having a fixed storage capacity shared between a plurality of data storage units, The method includes (a) performing a Compression-related operation on a data storage unit of the plurality of data storage units using a free pool of storage space, associated with the fixed storage capacity, as a swap space for the Compression-related operation, (b) detecting a size of the free pool, the size of the free pool representing unallocated storage space of the data storage system, (c) comparing the size of the free pool with a restricted threshold, and (d) if the size of the free pool falls below the restricted threshold, then pausing the Compression-related operation on the data storage unit, otherwise, continuing to perform the Compression-related operation on the data storage unit. Apparatus and computer program product for practicing the method are also provided.

Compression system pause and auto-resume

An information system has a database having distinct object structures that store information about corresponding operating components of the system. An association structure describes many-to-many relationships among the components. Targeted requests for information about first objects are satisfied by obtaining information from a first object structure as well as information about associated objects from the second object structure. Bulk requests for information about a large number of objects are handled differently, using a lookup structure that associates the first objects with limited information of the associated second objects, such as externally visible names which would be meaningful to a requestor. Thus response can efficiently provide full information about all first objects as well as limited but useful information about all associated second objects, avoiding traversals of the association structure and corresponding interrogations of the second object structure.

Application programming interface for efficient object information gathering and listing

A method is used in managing command line interface commands. Legacy CLI command information is received at a command line interface (CLI) provider. At the CLI provider, it is determined to convert the legacy CLI command information. The CLI provider has an adapter for performing the conversion. Updated CLI command information is derived by the adapter from the legacy CLI command information. The updated CLI command information is submitted to a plugin for processing.

Managing command line interface commands

A method is provided for testing a feature provider module of a data storage management application (DSMA), the feature provider module providing a feature. The method includes (a) receiving, at a simulation module of the DSMA when the DSMA is not in communication with an external feature implementation component, a test feature command from the feature provider module, (b) at the simulation module, simulating behavior of an interface module in communication with the external feature implementation component, and (c) at the simulation module, returning a feature response to the feature provider module, the feature response communicating the simulated behavior.

Growing community of inventors

Shanghai, China

Yuanjie Wu