Abstract: A subset of blocks from a set of blocks of a memory device are identified based on a valid data count constraint. A first block from the subset of blocks is selected based on a valid data count of the first block. A second block from the subset of blocks is selected based on a data temperature of the second block. A comparison of the first block and the second block is performed in accordance with one or more comparison criterion. The first block or the second block is selected as a garbage collection source block based on the comparison. Garbage collection is performed at the garbage collection source block.

Abstract: A system for providing user access to electronic mail includes an email client and an email server. The email client receives and communicates a user interaction with an email message The email server that receives the communication, determines whether the email message stored in a live database or in a backup storage. Upon determination that the email message is stored in a backup storage, the email server performs a message exchange with a backup storage system to perform the user-requested action.

Abstract: A system and for improving security of personally identifiable information stored in a computer database. The system and method enable a user's location information to be maintained in a data storage and retrieval system in such a way that it prohibits a user from being uniquely identified by the location information stored in the data storage and the retrieval system.

Abstract: Systems and methods are disclosed to implement, in a multi-writer database system, a database engine node that optimistically sends queued purge operations to a backend storage system without waiting for acknowledgement of previous operations from the storage system. If a conflict is later detected for a particular operation, the database engine node may retry some portion of the purge operations in the queue. In embodiments, the purge operations are performed as part of a garbage collection phase of a multi-version concurrency control (MVCC) protocol, where unneeded versions of objects previously generated for isolated snapshots are deleted. In embodiments, the operations in the queue may be grouped so that a rejection of one operation in the group will cause the entire group to be retried. Because these purge operations are idempotent and directed to objects that are invisible, they may be freely retried in arbitrary order, without maintaining any rollback state.

Abstract: A method includes storing an anchor row vector identification for an anchor row to a local memory. It is determined whether the anchor row vector identification is visible based on isolation requirements. The anchor row vector identification is accessed upon a determination that the anchor row vector identification is visible, and the row vector identification is re-read from the local memory. It is determined whether the anchor row vector identification has not changed since a start of the accessing. Upon a determination that the anchor row vector identification has not changed, read anchor row fields are returned. A first check history is performed on an anchor row history tuple sequence number (TSN) for the anchor row.

Abstract: Embodiments described herein relate to a method for managing file based backups (FBBs). The method may include obtaining a FBB mount request for a FBB mount of a FBB from an application, wherein the application is executing in a production host environment and the FBB is stored on backup storage; in response to the FBB mount request: capturing an entity context associated with the application; authenticating the entity context; obtaining, when the authenticating is successful, access control information corresponding to the FBB from the backup storage; determining a subset of the FBB for which the access control information indicates the entity context has permission to access; and enabling access to a portion of the FBB by the application.

Abstract: Systems and methods are provided for storing a first data object comprising a first set of immutable components, the first data object being associated with a corresponding second data object stored by a remote replication system. A difference is determined between the first set of immutable components of the first data object and a second set of immutable components of the corresponding second data object. A subset of immutable components is identified from the first set of immutable components based on the difference. The subset of immutable components from the first set of immutable components is provided to the remote replication system over a communication network.

Abstract: Provided are an in-memory management system and method using user traffic. According to embodiments thereof, traffic bandwidth is monitored for an ERP user who has left an LAN coverage area, by using an OpenFlow-based SDN WAN, and loading or unloading of a table partition set, an SQL Plan cache, and an SQL view cache in an in-memory is managed depending on a result of monitoring, so that the in-memory can be efficiently managed. The user traffic for the ERP user and the user can be monitored through the local network, and loading or unloading of table partitions of the in-memory can be managed on the basis of the monitored user traffic so that the in-memory can be managed regardless of Internet access. Data transmission rate and security can be enhanced because distributed communication is performed over an LAN and a WAN for each user and each ERP user.

Abstract: Using host connectivity states to avoid queuing I/O requests: identifying a fault in data communications between a first storage system and a second storage system among a plurality of storage systems across which a dataset is synchronously replicated; updating, upon identifying the fault, an access state of a data communications path between first storage system and a host from an active state to a transitional state with respect to the dataset; and indicating, to the host, a first access state change.

Abstract: A digital twin of an IT infrastructure is created to identify a group of critical servers (called “base servers”) needed to replicate the IT infrastructure in a cloud-computing environment. To identify the correct base servers and their actual server configurations, the IT infrastructure is crawled and various telemetry, connection, and network data is analyzed against data sets of other known servers. The digital twin is created to include these base servers and their particular configurations. Then, the digital twin may be deployed on demand in the cloud-computing environment using executable scripts that mimic the base servers and their particular configurations, creating a replication of the IT infrastructure for various purposes (e.g., redundancy, testing, etc.).

Abstract: Autonomous management of resources by an administrative node network is disclosed, including: receiving, at a first node of a plurality of nodes associated with an administrative node network, a resource request directed to the administrative node network, wherein the administrative node network is associated with managing a set of resources; obtaining a first proposal with respect to the resource request; obtaining a second proposal with respect to the resource request from a second node of the plurality of nodes associated with the administrative node network; and determining a processing consensus associated with the resource request based at least in part on the first proposal and the second proposal.

Abstract: Aspects relate to apparatuses and methods for determining and processing dormant data records on an immutable sequential listing. An exemplary apparatus includes a processor configured to monitor a plurality of timestamps associated with a plurality of data records stored on the immutable sequential listing, where the data record includes a job resume, detect inactivity in a first data record of the plurality of data records over a predetermined time period as a function of a first timestamp of the first data record, wherein the predetermined time period may be set by the user, tag, as a function of the inactivity, the first data record as an inactive first data record, and process, as a function inactivity, the first data record, wherein processing may include adding additional data or archiving inactive data records from the immutable sequential listing.

Abstract: The invention is a method for securing a system including a plurality of entities and a repository storing usage patterns. The method comprises the following steps: for each of the entities involved in a transaction requested by a user, capturing a behavior data reflecting the dynamic behavior of said entity, generating a set of locality-sensitive-hashing hashes from each of said behavior data, computing a similarity score for each of the entities involved in the transaction, based on both said usage patterns and the set of generated locality-sensitive-hashing hashes, and based on a subset of the computed similarity scores, applying a preset security action to the transaction.

Abstract: An apparatus comprises a host device configured to communicate over a network with a storage system. The host device comprises a multi-path input-output driver configured to control delivery of input-output operations from the host device to the storage system over selected ones of a plurality of paths through the network. The multi-path input-output driver is further configured to collect information characterizing input-output patterns for each of a plurality of different applications executing on the host device, and to provide the collected information to a machine learning system. The machine learning system utilizes the collected information to generate one or more application predictions based at least in part on analysis of observed input-output patterns. The collected information in some embodiments comprises statistical distributions of numbers of input-output operations having payload sizes falling into specified ranges over a given time period.

Abstract: In one example, a method includes obtaining cluster and machine configuration information, sending a restore request for one or more machines, and loading a backup of a virtual machine, the backup having been created by a federated backup process involving the physical proxy node, and the virtual machine includes data that resides on a virtual federated database that is an element of a cluster environment and to which respective databases of each of a plurality of nodes of the cluster environment are mapped. Next, the virtual machine is taken offline after the backup of the virtual machine has been loaded, and after the virtual machine has been taken offline, the virtual machine is removed from the node where it resides. The backup of the virtual machine is then restored, and the restored virtual machine brought online, after which the restored virtual machine is enabled as a cluster-wide virtual machine.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for data retention and modification. One of the methods includes dividing partitions into a set of generations according to a retention policy; accumulating modification and deletion events that define changes to be applied to data of the distributed dataset; and when a triggering event occurs for a triggered generation in the set of generations, rolling an oldest partition out of the triggered generation, the rolling comprising: if the oldest partition has reached the end of a retention period for the dataset, marking the oldest partition for deletion in the triggered generation; otherwise: creating a new partition corresponding to the data of the oldest partition, wherein the data is cleaned using a scrubbing process; adding the new partition to a next generation in the set of generations; and marking the oldest partition for deletion in the triggered generation.

Abstract: The systems and methods provide for migrating database management system (DBMS) applications to cloud storage by automating a continuous replication of changes made to the DBMS from the DBMS to an associated cloud instance. For example, the systems and methods facilitate the migration of the DBMS via multiple processes performing in parallel—a process to create and provision a new machine instance (e.g., an EC2 instance), a process to clone and transfer parameters of the operating system/software of the DBMS, and a process that backs up and/or captures the application data of the DBMS. In some embodiments, the systems and methods, utilizing parallel processes, and combining outputs of the processes to a synchronization process, efficiently and quickly migrate DBMS applications to cloud storage, among other benefits.

Abstract: A storage system performs data replication with a recovery point objective (RPO). The storage system replicates data at intervals through data transfers over a network. The storage system determines bandwidth of the network. The storage system determines the intervals for replicating the data, based on size of data transfers, network bandwidth, and the recovery point objective.

Abstract: A storage control apparatus, includes a memory; and a processor coupled to the memory and configured to: receive management information for managing data stored in a first storage device, generate, for each processing unit of the data, restoration information for restoring the management information, add the data to the restoration information by processing the data based on the management information on a second storage device, store, in the first storage device, the added restoration information, and reconstruct the management information on the second storage device based on the added restoration information when detecting an abnormality occurrence on the receiving the management information.

Abstract: In one aspect, adaptive replication modes in a storage system are provided. An aspect includes during an active replication session in which a first type of replication is performed at the storage system, monitoring write input/output (IO) operations, collecting data from the write IO operations, and determining, from the collected data, write IO latency. Upon determining that a threshold value has been met from the write IO latency, where the threshold value is defined for the first type of replication, an aspect includes automatically switching from the first type of replication to a second type of replication. The second type of replication is configured to compensate for operational deficiencies detected in response to the write IO latency.

Abstract: In example embodiments, techniques are provided for visualizing a 3D model in an interactive editing workflow. A user modifies one or more elements of a model of the 3D model, by inserting one or more new elements having geometry, changing the geometry of one or more existing elements and/or deleting one or more existing elements having geometry. An updated view of the 3D model is then rendered to reflect the modification to the one or more elements in part by obtaining, for each new element or changed existing element of the model visible in the view, a polygon mesh that represents geometry of the individual element, obtaining a set of tiles that each include a polygon mesh that represent collective geometry of a set of elements intersecting the tile's volume, displaying the polygon mesh for each new element or changed existing element, and displaying the set of tiles while hiding any deleted or changed existing elements therein.

Abstract: A write lock request for a data object on behalf of a first data accessor is received at a lock manager. The data object is currently locked on behalf of a second data accessor. The lock manager modifies lock metadata associated with the data object to indicate the first data accessor as the primary lock owner, and designates the second data accessor as a non-primary owner.

Abstract: Aspects relate to apparatuses and methods for determining and processing dormant data records on an immutable sequential listing. An exemplary apparatus includes a processor configured to monitor a plurality of timestamps associated with a plurality of data records stored on the immutable sequential listing, wherein the data record includes a job resume, detect inactivity in a first data record of the plurality of data records over a predetermined time period as a function of a first timestamp of the first data record, wherein the predetermined time period may be set by the user, tag, as a function of the inactivity, the first data record as an inactive first data record, and process, as a function inactivity, the first data record, wherein processing may include adding additional data or archiving inactive data records from the immutable sequential listing.

Abstract: Systems and methods are described for leveraging group signature technology to allow a group manager to set up rules that govern what requires consensus between members of the group. Consensus may require a plurality or a majority of signers using their individual private keys to use a group public key associated with the group. Group membership with group signatures allow for one group public key and a plurality of private keys, where each private key is associated with a group member.

Abstract: Implementations provide a database lock mechanism used to prevent concurrent writes to service on network partition scenarios associated with a version control system. The database lock mechanism may be provided on per repository basis to ensure both nodes are working and maintaining data consistency, even when they are not connected when interruptions in network communication disrupts the intercommunication between nodes. In other implementations, the disclosed locking mechanism is configured to ensure and perform write and synchronization operations on isolated nodes, regardless of miss-communication between the nodes.

Abstract: Row locking is performed at the row level of granularity for database data stored in columnar form. Row level locking entails use of a lock vector that is stored in a compression unit in a data block, the compression unit storing rows in columnar-major format. On an as needed basis, the lock vector is expanded to identify more transactions affecting the rows in the compression unit.

Abstract: A method and apparatus for distribution of applications amongst a number of servers, ensuring that changes to application data on a master for that application are asynchronously replicated to a number of slaves for that application. Servers may be located in geographically diverse locations; the invention permits data replication over high-latency and lossy network connections and failure-tolerance under hardware and network failure conditions. Access to applications is mediated by a distributed protocol handler which allows any request for any application to be addressed to any server, and which, when working in tandem with the replication system, pauses connections momentarily to allow seamless, consistent live-migration of applications and their state between servers.

Abstract: Provided are a computer program product, system, and method for managing multiple locks for data set members in a data set index. The data set index has leaf nodes and internal nodes. In response to determining that a current lock is set at a locked node that prevents a grant to a requested lock, a determination is made as to whether there are different first and second descendant nodes from the locked node at a same level of the tree data structure linked to the requested data set member and the locked data set member, respectively. If so, the requested lock for the requested data set member is set at the first descendant node, the current lock is moved to the second descendant node for the locked data set member and the requested lock is granted.

Abstract: A content management system provides content item sharing and synchronization for users of client devices. The content items stored by content management system can include any type of data, such as digital data, media, data files and databases, source and object code, recordings, and any other type of data or file. A collaboration content item management system allows users to create, edit and share collaboration content items among a plurality of other users. Collaboration content items are files that a users can create and edit using a collaboration content items editor, and are composed of collaboration content item elements. The content management system and collaboration content item management system provide functionality for linking content items with collaboration content items to keep the contents of each synchronized with one another and allow for access of the same content from both systems.

Abstract: In one aspect, performance optimization for data persistency in asynchronous replication setups includes creating at a source site of a data replication system, a snapshot (snapshot N) of input/output (IO) requests as part of a replication cycle, computing a delta of snapshot N and a previously created snapshot (snapshot N?1), and transmitting the delta to a target site of the data replication storage system. An aspect further includes storing, at the target site, snapshot N?1 during transmission of the delta, and caching the delta to a non-persistent storage device. Upon determining an occurrence of a loss event at the target site, a further aspect includes transmitting, by the target site, a request to retransmit the delta, retransmitting, by the source site, the delta to the target site, caching the delta to the non-persistent storage device until successful transmission of the delta, and committing the transmitted delta to permanent storage.

Abstract: A method, system, and program product for modifying a high performance multi-write database is provided. The method includes registering data pages configured for reading by a first node within a buffer pool structure of a database. Share lock functionality is enabled. The share lock functionality is disabled after the first node has completed reading the data pages and the data pages are registered with respect to a second node for writing functionality. A notification indicating that a group of data pages has expired is generated and transmitted to the second node. Exclusive lock functionality for allowing the second node to read and modify the data pages is enabled and after the modification the exclusive lock functionality is disabled. Reading functionality is enabled for the first and second nodes to read the group of data pages from a high performance cache structure of the buffer pool structure.

Abstract: An apparatus includes a processor to: within each collection thread, assemble a row group from stored rows, generate row group metadata corresponding to the row group, and store the row group and row group metadata within a data buffer of a queue; operate the queue as a FIFO buffer; within each aggregation thread, retrieve multiple row groups and corresponding row group metadata from multiple data buffers of the queue, assemble a data set part from the multiple row groups, generate part metadata that includes the row group metadata, and transmit, to storage device(s) and/or a requesting device, the data set part and/or the part metadata; and in response to each retrieval of at least a row group from a data buffer of the queue for an aggregation thread, analyze availability of storage space within the node device to determine whether to dynamically adjust the quantity of data buffers.

Abstract: Disclosed are examples of systems, apparatus, methods, and computer program products for processing offline updates to records of a database system. In some implementations, a first update to a record is processed, and the record is modified according to a first action and first data of the first update. A second update to the record from a device with an offline status is processed. It can be determined that the second update and the first update are associated with a same portion of the record. It can be determined that the second timestamp is prior to the first timestamp. A notification can be provided to the device. The record can be modified according to a second action and second data of the second update.

Abstract: The Object-Level Metadata-Preserving Cross Heterogeneous Operating Systems Backup And Restore Apparatuses, Methods And Systems (“MPBR”) transforms pairing request, backup request, restore request inputs via MPBR components into pairing response, backup response, restore response outputs. A device pairing request associated with a source share at a source device is obtained. A simulated block device backup volume for the source share is created on a backup device and formatted using a file system driver executable by the backup device's operating system. A backup request associated with the source share is obtained. A connection is established between the backup device and the source device using a file sharing protocol driver configured such that files metadata is presented to the backup device in a compatible metadata format. Files from the source share are synchronized. Changed synchronized files are determined. Metadata associated with the changed files is updated. A snapshot of the volume is generated.

Abstract: Embodiments of the disclosure provide techniques for updating a distributed transaction log on a previously offline resource object component using distributed transaction logs from active host computer nodes from separate RAID mirror configurations. Each component object maintains a journal (log) where distributed transactions are recorded. If a component object goes offline and subsequently returns (e.g., if the node hosting the component object reboots), the component object is marked as stale. To return the component object to an active state, a distributed resources module retrieves the journals from other resource component objects from other RAID configurations where the data is mirrored. The module filters corresponding data that is missing in the journal of the previously offline corresponding object and merges the filtered data to the journal.

Abstract: Techniques are provided for managing cached data objects in a mixed workload environment. In an embodiment, a system, log data is stored in one or more buffers. In response to receiving a request to perform a logical write, a first process writes a first portion of the log data to a log file in persistent storage. While the first portion of the log data is being written to the log file, a second process writes a second portion of the log data in the one or more buffers to the log file in persistent storage. In another embodiment, a request to perform a second logical write may be received before the first logical write completes. While the first log data is being written to the log file, one or more processes write second log data for the second logical write to the log file.

Abstract: A multimedia collaboration system that facilitates more efficient, free-flowing collaboration sessions. The role of the presenter can be exchanged among participants in a collaboration session. The multimedia collaboration system is configured so that control of a collaboration session can be exchanged freely between participants in the collaboration session. The multimedia collaboration system enables participants in the collaboration session to determine the pace and course of the session.

Abstract: A method and apparatus for forming a collection of documents is disclosed. In the method and apparatus, a plurality of documents are identified for inclusion in a document collection. The documents are identified based at least in part on one or more attributes of at least one document of the plurality of documents. A user is requested to confirm the document collection, and an instruction is received from the user indicating one or more documents of the plurality of documents may be included in the document collection. After the indication is received, the collection may be formed and made available to the user or one or more other users of a document management and collaboration system.

Abstract: In one embodiment, a supervisory device for a network of a power substation identifies a plurality of nodes in the network of the power substation. The supervisory device associates each of the nodes with one or more security certificates. A particular security certificate authenticates a particular node to the supervisory device and authorizes the particular node to communicate in the network of the power substation. The supervisory device determines a security perimeter for the nodes in the network. The supervisory device schedules communications among the nodes using the one or more security certificates and based on the determined security perimeter.

Abstract: A clustered storage system may include potentially many different nodes, each including a storage driver and a kernel module. A node may mount a virtual storage volume for the use of a container application at the node. The storage driver and kernel module may receive a request from a storage driver at a different node and respond by indicating whether the virtual storage volume is in active use. In this way, the clustered storage system may safely but forcibly unmount a virtual storage volume having a failed or hanging mount point so that the volume may be mounted on a different node.

Abstract: Systems and methods are provided for semi-durable transaction log storage in a two-phase commit protocol transaction processing. An exemplary method includes receiving a distributed transaction comprising a plurality of processes for processing, wherein the processing uses a two-phase commit protocol and preparing, by a main coordinator, at least one participant comprising at least one of the plurality of processes to prepare for execution by the at least one participant. The method further includes receiving, by the main coordinator, information comprising prepared processes of the at least one of the plurality of processes and storing, by the main coordinator, a transaction log comprising the at least one participant and the information to a semi-durable storage. The semi-durable storage may comprise a crash-proof storage that survives system failure. Thus, the semi-durable storage may write the transaction log to the durable storage if there is a system failure.

Abstract: The present disclosure relates to a method for multi-user, at least partially concurrent, electronic circuit design. Embodiments may include storing a lock list at a client computing device, wherein the lock list includes objects associated with an electronic design that have been locked or unlocked. Embodiments may further include receiving a user input corresponding to a lock/unlock request associated with an object of the design, wherein the design is accessible by multiple users in an at least partially concurrent manner. Embodiments may include transmitting the lock/unlock request to a server computing device. Embodiments may further include comparing the user input corresponding to at least one of the lock request or unlock request with the lock list and determining whether to lock or unlock the object based upon, at least in part, the comparison, wherein determining does not include receiving server authorization.

Abstract: The presently described embodiments relate to a novel system and method to collect state as a snapshot from a potentially transient endpoint and transmit the state to a public or private network for storage and processing. This system and method allows for the synchronization and virtualization of the endpoint state image in the network for purposes of processing, analysis, and reporting, including but not limited to endpoint vulnerability auditing.

Abstract: A method includes: upon receipt of a request of update processing for a first record including a numerical data item in a database, generating, by a processor, a second record by duplicating the first record while a value corresponding to an update content of the update processing is set to the numerical data item, the update processing being processing of updating the value of the numerical data item according to the update content; and executing the update processing for the second record in response to the request.

Abstract: A method and apparatus for distribution of applications amongst a number of servers, ensuring that changes to application data on a master for that application are asynchronously replicated to a number of slaves for that application. Servers may be located in geographically diverse locations; the invention permits data replication over high-latency and lossy network connections and failure-tolerance under hardware and network failure conditions. Access to applications is mediated by a distributed protocol handler which allows any request for any application to be addressed to any server, and which, when working in tandem with the replication system, pauses connections momentarily to allow seamless, consistent live-migration of applications and their state between servers.

Abstract: Systems, methods, and apparatuses for resource monitoring identification reuse are described. In an embodiment, a system comprising a hardware processor core to execute instructions storage for a resource monitoring identification (RMID) recycling instructions to be executed by a hardware processor core, a logical processor to execute on the hardware processor core, the logical processor including associated storage for a RMID and state, are described.

Abstract: A queue management capability enables allocation and management of tracking queue entries, such as load and/or store queue entries, at execution time. By introducing execution-time allocation of load/store queue entries, the allocation point of those entries is delayed further into the execution stage of the instruction pipeline, reducing the overall time the entry remains allocated to a specific instruction. The queue management capability may also resolve deadlock conditions resulting from execution-time allocation of the queue entries and/or provide a mechanism to avoid such deadlock conditions.

Abstract: According to embodiments, reconfiguration of lock masters for a cluster of nodes is optimized using coordinated hash indexes to index into the master hash table and into local hash tables stored on the nodes of the cluster. A DBMS uses a hybrid hash index, a portion of which represents a corresponding master hash index, to index into both the master hash table and into a local hash table for a given lock. The hash index used to store lock metadata in a particular local hash table bucket, on a particular node, encodes the lock master index, for a master hash table, to which the locks in the local hash table bucket correspond. Only the portions of the local hash table on the lock master that correspond to the index of the master hash table bucket need to be scanned in order to perform needed tasks for lock master reconfiguration.

Abstract: A database server receives a request to perform a primary query on a table of a database. A first table query can be generated and can include a starting row identifier, ROW A, and a number of rows, n, for generating a data chunk from the table of the database. Multiple table queries can be performed each having a different starting row identifier and each defining the number of rows forming a data chunk. The primary query can be extended with the first table query in preparation for performing the primary query on the first data chunk.

Abstract: Methods and apparatus for computer systems having first and second memory tier having regions, physical memory having page caches that are shareable with multiple ones of the regions in the first memory tier and the regions in the second memory tier, and virtual memory having mmaps of ones of the regions in the first memory tier and ones of the regions in the second memory tier, wherein the mmaps are associated with multiple ones of the pages caches.