International Business Machines Corporation

Actona Technologies Ltd.

Cisco Technology, Inc.

Vita Bortnikov

Ilya Shnayderman

Shlomit I Shachor

Idan Zach

Etai Lev Ran

Zvi Cahana

William Jon Schmidt

Israel Cidon

Shahar Glixman

Alexey Roytman

Daniel Kaminsky

Gregory Chockler

Bilha Mendelson

Israel Ben Shaul

Danit Ben Kiki

Inbal Shavit-Lottem

Jason K Resch

Michael Edward Factor

Robert Ralph Roediger

Steven Duane Clay

Mark Novick

Ravi V Khadiwala

Roberta Jo Cochrane

Avi Yaeli

Guy Laden

Christopher Paul Vignola

Gabi Zodik

Bruno Wassermann

Michal Malka

Dmitri Perelman

Mike Joseph Spreitzer

David John Lambert

Shlomit Ifergan-Shachor

Michele Martino Franceshini

David H Carman

Ifergan S Shachor

A method and a system for checking permissions compatibility between a configuration management system and an orchestration system of a computing cluster are disclosed. The method comprises: identifying a request to approve a change in at least one file of the computing cluster. Retrieving from a repository of the configuration management system an identity of a user for performing the change. Acquiring a denial response or an approval response received in response to a query provisioned to the orchestration system, the query is for rights to change the at least one file using the identity of the user. In response to the approval response, entering the approval response, into the configuration management system for confirming the checking permissions compatibility is approved. In response to the denial received, sending a message to the configuration management system, the message is indicative that the checking permissions compatibility is not approved.

Method and system for checking permissions compatibility between a configuration management system and an orchestration system of a computing cluster

An example operation may include one or more of dividing a data object into a plurality of parts, hashing the data object to generate a hashed data object and hashing the plurality of parts to generate a plurality of hashed parts, generating a plurality of slices where each slice includes the hashed data object and a different respective hashed part, and distributing the plurality of slices across a plurality of blockchain peers, respectively.

Efficient threshold storage of data object

A method of integrating a distributed ledger represented by a blockchain with a distributed storage network (DSN) begins by sending a proof of existence request to the DSN, the proof of existence request including an object name, an object version, a start time and an end time. The method continues by reading the object metadata for the sent object name. The method continues by checking a revision history from object metadata associated with the sent object name to ensure the object existed by the start time through the end time with no deletions and, if the object did not exist by the start time through the end time with no deletions, rejecting the proof of existence request and returning an error response. If the object did exist by the start time on through the end time with no deletions, the method continues by producing and returning an attestation comprising verification information related to the object.

Producing proof of receipt, existence and other data provenance evidence

A computer determines whether it has received user input or a node within a replica set has reached a capacity threshold. Based on receiving user input or determining that a node within a replica set has reached a capacity threshold, creating a snapshot of the data stored in the replica set and partitioning the data based on the created snapshot. The computer then initializing nodes within a new replica set and moves a partition from the original replica set to the new replica set before deleting the other partition from the old replica set.

Scaling quorum based replication systems

Embodiments of the present invention provide a means for managing portable Internet Protocol (IP) addresses and virtual machine persistent storage. The invention includes defining a set of available portable IP addresses. When a request for a portable IP address is received from a first virtual machine (VM), a first portable IP address is assigned to the first VM. The assignment of the first portable IP address to the first VM extends for a predetermined amount of time and requires a lease renewal to extend the assignment.

Management of clustered and replicated systems in dynamic computing environments

A method and system for implementing a replica network configuration in a distributed system is provided. The system includes a memory having computer readable instructions, and one or more processors for executing the computer readable instructions. The computer readable instructions include generating a replica node that is assigned a computer readable storage medium and a processor, receiving, at the computer readable storage medium, a network configuration of the replica node from a system administrator, automatically generating, using the processor, a unique identifier (UUID) for the replica node, transmitting the UUID to a plurality of replica nodes of the distributed system arranged in the replica network configuration, and storing the UUID in the computer readable storage medium, wherein the computer readable storage medium is a persistent storage.

Method and apparatus to allow dynamic changes of a replica network configuration in distributed systems

A computer-implemented method, computerized apparatus and computer program product, the method comprising: receiving a proposed reconfiguration command, the proposed reconfiguration command indicating a modification of a protocol version employed by a plurality of replica-set processes to an updated protocol version; tentatively agreeing on at least one proposed command following the proposed reconfiguration command, the at least one proposed command being in accordance with the updated protocol version, wherein said tentatively agreeing is decided prior to agreeing on the reconfiguration command; and, responsive to agreeing on the reconfiguration command, committing the tentatively agreed at least one proposed command.

Method and system for upgrading a set of replicated state machine processes

An approach is provided in which a replicated memory system replicates a set of data between multiple replicas, whereby each of the replicas includes a sequence update number corresponding to an update state of its respective set of data. At least one of the replicas identifies a number of replicas to which it connects and, in turn, the replicas select one of replicas as a leader replica based at least on the selected leader replica's sequence update number and the number of replicas to which the selected leader connects.

Choosing a leader in a replicated memory system

A processor-implemented method, for continuing operation of a quorum based system is provided. The method detects a loss of quorum. A plurality of speculative configurations is created, whereby each speculative configuration is isolated from other speculative configurations in the quorum based system. Each speculative configuration continues to order requests during the creation of speculative configurations. The method selects and starts one of the plurality of speculative configurations as a new operational configuration. Ordered requests continue to the new operational configuration. The original configuration of the quorum based system is restarted in response to the plurality of speculative configurations not being isolated.

Continuing operation of a quorum based system after failures

Using a quorum of fully updated replicas to designate a leader replica. A quorum of fully updated replicas designate a leader replica through 'prepared' messages, allowing for restoration of failed replicas without a split-brain condition.

Repopulating failed replicas through modified consensus recovery

A method for enabling access to a data resource, which is held on a file server () on a first local area network (LAN) (), by a client () on a second LAN (). A proxy receiver () on the second LAN () intercepts a request for the data resource submitted by the client () and transmits a message via a wide area network (WAN) () to a proxy transmitter () on the first LAN (), requesting the data resource. The proxy transmitter () retrieves a replica of the data resource from the file server () and conveys the replica of the data resource over the WAN () to the proxy receiver (), which serves the replica of the data resource from the proxy receiver () to the client () over the second LAN ().

Virtual file-sharing network

A method for selecting a leader node among a plurality of network nodes, comprising: providing a current configuration of selected nodes in replicated state machine based system, wherein a first node is set for handling commands received from clients; executing a consensus protocol by the selected nodes under the current configuration; identifying at least one fault indicative event of the first node; calculating a suggested configuration of selected nodes, wherein a second node is set for handling the commands; informing each member of the suggested configuration and the first node of the suggested configuration; executing the consensus protocol in parallel under both the suggested configuration and the current configuration; and when detecting that the first node is faulty, setting the second node for handling the commands under the current configuration in place of the first node and reconfiguring the current configuration to become the suggested configuration.

Efficient fail-over in replicated systems

A method for continuously updating a set of replicas. The method comprises storing a plurality of replicas of data in a current configuration of members from a plurality of nodes, receiving a reconfiguration command by a member of said current configuration, selecting at least one estimated configuration from said plurality of nodes, receiving at least one write command by a member of said current configuration, disseminating said at least one write command to each member of said at least one estimated configuration and validating said at least one estimated configuration. At least one estimated configuration processes at least one of the write commands before the validating is completed.

Continuous operation during reconfiguration periods

A method of updating statuses of processes in a network is provided. The method may include the following steps: connecting N processes on a K-connected overlay network of nodes which is in operative association with a computer network; determining an update of subscription and un-subscription statuses of at least some of the processes; generating update messages reflecting the subscriptions and the un-subscriptions, the update messages being differences between previous update and current update; and propagating the update messages through the K-connected graph, such that at least some of the processes transfer the update to its respective K neighboring nodes, wherein at least one of the connecting, the subscribing, the unsubscribing, the generating, and the propagating is executed by at least one processor.

Growing community of inventors

Haifa, Israel

Vita Bortnikov