Emc IP Holding Company LLC

Emc Corporation

Leehod Baruch

Assaf Natanzon

Jehuda Shemer

Amit Lieberman

Ron Bigman

Saar Cohen

Lev Ayzenberg

Slavik Neymer

Philip N Shilane

Dennis Thomas Duprey

Alex Solan

Karl M Owen

Valerie Lotosh

Erez Sharvit

Ido Singer

Ron Cooper

Asaf Natanzon

Asaf Bar'el

A computer implemented method, system, and program product comprising examining points in time in each journal of each of the replication sites, determining certain points of time in each journal of each of the replication sites to be deleted based on a policy, and deleting the certain points of time in each journal of each of the replication sites.

Multi copy journal consolidation

A storage system comprises an object store, which comprises a plurality of metadata objects, a plurality of change objects, and a plurality of data objects associated with data stored in at least one logical unit of a production site, and a replication site configured to generate a requested point in time (PIT) based at least in part on the plurality of data objects, by: dividing the plurality of metadata objects into a plurality of respective portions of metadata objects; mapping each respective portion of metadata objects to a respective one of a plurality of reducer nodes; performing map reduce operations on the respective portion of metadata objects, at each respective one of the plurality of reducer nodes, to apply the most recent list of changes that occurred to each offset before the first requested PIT; and merging together the list of changes from each reducer node into the requested PIT.

Methods, systems, and apparatuses to update point in time journal using map reduce to create a highly parallel update

A computer-implemented method is provided. First information is received from at least a first data source. Based at least in part on analysis of the received first information, a determination of a first risk of a first adverse event is made, the risk affecting a first entity associated with a first location. Based at least in part on the first risk, at least a first impact from the first adverse event on the first entity is determined. At least a first action is dynamically caused to occur either before the completion of the first adverse event, the first action configured to substantially mitigate the first impact.

Risk based analysis of adverse event impact on system availability

Access to historical data of a file system in a data storage environment is provided, wherein the historical data corresponds to one or more points in time occurring in the past. The historical data of the file system is modified, wherein the historical data comprises at least one of a component from a replica of the file system and an element of an activity log of the file system.

Modification of historical data of file system in data storage environment

A bug or problem that occurs during execution of an application is detected and a time at which the problem occurred is stored. An enhanced copy of the application is restored from before the time at which the problem occurred, and the enhanced copy of the application is run. If the problem is reproduced, the application is paused. If the problem is not reproduced, restoration of the enhanced copy, running of the enhanced copy and detection of the problem are repeated for a pre-designated number of times.

Proactive debugging

A method, system, and computer program product for determining a consistent point in time in a replication environment comprising determining periods of time that no IO was received from sources; wherein the periods are determined to account for differences between the clocks of the sources and the clock at a replication appliance, adjusting the periods of time that no IO was received by at least one delay factor, comparing the adjusted periods of time from the sources to determine a common period of time; wherein the common point in time denotes that each source was in a consistent state and marking the adjusted point in time as a consistent point in time in a journal.

Consistency determination

Described embodiments provide systems and methods for verifying replicas of a storage system. A replica of a production site of the storage system is generated. A hash value associated with the generated replica is also generated. The replica is provided to a cloud backup provider. The hash value associated with the generated replica is provided to a blockchain in communication with the production site and the cloud backup provider. The blockchain may be employed to verify the replica.

Proof of data replication consistency using blockchain

In one embodiment, a method includes replicating a production volume on a plurality of replica volume portions. Each replica volume portion is stored on a respective storage array with a respective journal. The replicating includes distributing data from a write command to a production volume across the replica volume portions using a coding scheme. A subset of replica volume portions, less than a total number of replica volume portions, includes data for a full replica volume of the production volume.

Distributed copy in multi-copy replication where offset and size of I/O requests to replication site is half offset and size of I/O request to production volume

Described embodiments provide systems and methods for operating a storage system that may determine one or more properties for each of a plurality of input/output (I/O) to a production volume of a storage system and monitor one or more operating conditions of the storage system. Embodiments may further include determining a score for each I/O based upon one or more of: the one or more properties of the I/O and the one or more operating conditions; adapting a replication threshold based upon the one or more operating conditions; comparing the determined score for each I/O to the adapted replication threshold; and based upon the comparison, performing continuous replication or snapshot replication for each I/O.

I/O score-based hybrid replication in a storage system

A problem that occurs during execution of an application is debugged by building a lightweight container image and an enhanced container image. Data traffic for debugging is selected and the selected data traffic is copied using an enhanced copy. The problem is debugged using the enhanced container image and the selected data traffic.

Debugging using dual container images

Improved restore services in data storage environments are provided. In one example, a method includes the following steps. Generation of a point-in-time copy of a set of files associated with a data storage system is requested. The point-in-time copy is useable for restoring data blocks of the set of files onto the data storage system. The point-in-time copy of the set of files is generated at a data protection system operatively coupled to the data storage system in response to the requesting step. The point-in-time copy of the set of files is stored at the data protection system.

Integration of restore service with data protection system

A storage system is provided, comprising a processor and a storage array comprising a data storage entity storing computer-accessible data and a container executing within the storage array. The container is configured to run a temporal query service configured to query the data storage entity in the storage array from within the storage array, wherein a structure of a temporal query generated in accordance with the temporal query service comprises a query format configured to be compatible with a temporal structure of the data storage entity. The temporal query service is configured to parse at least a first temporal query received from a requesting entity to determine a set of temporal query parameters relating to data stored on the data storage entity, query the data storage entity with a second temporal query formed in accordance with the set of query parameters, and return temporal query results.

Temporal queries on secondary storage

Metadata from a file system in a data storage environment is obtained. The obtained metadata from the file system is indicative of one or more properties of one or more data blocks storable in the data storage environment. One or more data optimizations performed in a data protection operation for the data storage environment with respect to the one or more data blocks are controlled based on at least a portion of the metadata obtained from the file system.

Data optimization decision control based on file system metadata

Embodiments of the present disclosure relate to a method, an apparatus and a computer program product of recovering from a failure of a first node within a data storage system by receiving notice from the data storage system that the first node has failed; and restoring the first node based on a heat map of data I/O activity to the first node.

Recovery of nodes

A storage system is provided, comprising a processor and a first storage array in operable communication with the processor. The first storage array comprises a data storage entity and a container executing within the storage array, the container in operable communication with the data storage entity. The container is configured to run at least one service used to control at least one operation used by the storage system. In certain embodiments, the container is configured to execute the service within the storage array to control operations involving the storage array from within the storage array. In certain embodiments, the container further comprises a service intercepting and controlling inputs and outputs (I/O) to and from the storage system.

Growing community of inventors

Rishon Leziyon, Israel

Leehod Baruch