Abstract: Provided is a computer-implemented method, system, and computer program product for automatic selection of tests for software system regression testing using machine learning including generating a test mapping including at least one test of a plurality of tests corresponding to a source file. The plurality of tests and the at least one source file are associated with a software repository. Further, determining a defective score for the at least one test based on historical test data of the at least one test, receiving a component criticality score and a defect definition corresponding to the source file, generating a key value corresponding to at least one test based on the defective score, component criticality score, and defect definition, determining a subset of tests of the plurality of tests based on the key value corresponding to the at least one test; and executing the subset of tests with the software repository.

Abstract: A data storage device and method for host-assisted efficient handling of multiple versions of data are provided. In one embodiment, a data storage device is provided comprising a memory and a controller. The controller is configured to receive, from a host, identification of different versions of data that are to deleted together, store the different versions of the data in areas of the memory that are erasable in parallel; receive, from the host, a command to erase the different versions of the data; and erase the different versions of the data in parallel. Other embodiments are provided.

Abstract: A data communication method, a server device, a client device, and a medium are disclosed, the data communication method includes: receiving at least one resource transmission request sent from at least one entity, the resource transmission request including a resource identifier associated with a resource and a priority identifier associated with the resource transmission request; storing the at least one resource identifier according to the priority identifier; acquiring the resource from the entity according to the stored resource identifier of the resource transmission request.

Abstract: In an embodiment, a process to predict a probability of a future event occurring in a present competition includes receiving time-stamped position information of one or more participants in the present competition. The time-stamped position information is captured by a telemetry tracking system during the present competition. The process uses the time-stamped position information to determine a first play situation of the present competition. The process determines, based on at least the first play situation and playing data associated with at least a subset of one or both of a first set of one or more participants and a second set of one or more participants, a prediction of the probability of a first future event occurring at the present competition.

Abstract: A software system operates to store information about a plurality of products in a common data management system that serves as a single source of truth for product information. Multiple different computing systems can access and edit item records. As information in the item records is updated, other computing systems can access the updated information immediately. The overall system is a multi-use tool for assortment planning that allows for flexible data sharing across the lifecycle of an item for item definition, budget definition, and vendor negotiation.

Abstract: In some examples, a first computing device of a plurality of computing devices may be a member of a first partition group. For example, the first partition group may correspond to a first partition of multiple partitions of a metadata database. The first partition group may include at least one other computing device. Furthermore, each of the plurality of computing devices may maintain at least one partition of the metadata database so that the metadata database is partitioned into multiple partitions distributed across the computing devices. The first computing device may determine a first time threshold for a heartbeat communication to be sent to the other computing device(s) in the first partition group, and may select a random time before the first time threshold. The first computing device may send, based on the selected random time, the heartbeat communication to the other computing device(s) in the first partition group.

Abstract: A data protection agent is installed within a virtual machine (VM). A request to perform a backup is received. The request includes identifications of virtual machine disks (VMDKs) associated with the virtual machine. Communications are exchanged with a disk manager of a guest operating system of the VM to generate a map that maps the VMDKs to volumes attached to the VM. Communications are exchanged with an application in the VM to be protected to identify which of the volumes contain application databases associated with the application. A copy service is instructed to prepare the application for backup. A request is issued to a snapshot data mover for a snapshot of the application. The snapshot request includes identifications of a subset of the VMDKs mapped to corresponding volumes that contain the application databases. VMDKs mapped to corresponding volumes not containing the application databases are excluded from the snapshot request.

Abstract: A system and method for automatic deletion in a persistent storage device. In some embodiments, the method includes: receiving, by a persistent storage device, a first read command, for a first logical block of data; determining that a total number of read operations, for the first logical block of data, equals or exceeds a first threshold value; and in response to determining that the total number of read operations, for the first logical block of data, equals or exceeds the first threshold value, arranging for deletion of the first logical block of data from the persistent storage device.

Abstract: An Application Data Management System (ADMS) enables an application file system to be mounted at any selected reconstruction time (TR). If the reconstruction time TR falls intermediate snapshot creation timepoints, the ADMS creates a version of the application file system at the selected reconstruction time TR using a snapshot of the data file from a previous application file system snapshot creation timepoint, and a snapshot of the log file from a subsequent application file system snapshot creation timepoint. The ADMS uses the snapshot of the log file from the subsequent snapshot creation timepoint to replay transactions on the snapshot of the data file from the previous snapshot creation timepoint up to the selected reconstruction time TR. This enables the state of the application file system to be recreated and mounted at any arbitrary selected reconstruction time, even if the selected reconstruction time is not coincident with snapshot creation timepoints.

Abstract: A computing device includes an interface for communicating with a storage network and is configured to determine a performance level for each set of storage units of a plurality of sets storage units in the storage network, where the performance level includes a number of errors detected during a period of time T. The computing device is further configured to update performance information for the plurality of sets storage units to produce updated performance information for the plurality of sets storage units and determine which sets of storage units of the plurality of sets storage units meet a minimum performance level. The computing device is configured to receive a set of read requests for a set of encoded data slices stored on the plurality of sets storage units and transmit a threshold number of read requests of the set of read requests to a set of storage units that meet the minimum performance level.

Abstract: Facilitating checkpoint locks for distributed systems is provided herein. A system can comprise a processor and a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations. The operations can comprise generating an ordered data structure that comprises respective identifications of a group of nodes granted a shared lock for a data file. The group of nodes can comprise a node having a respective identification of the respective identifications. The operations also can comprise, based on a determination that a checkpoint function associated with the shared lock has completed at a node of the group of nodes, removing the respective identification of the node from the ordered data structure. In an example, the shared lock can be a checkpoint application program interface. In another example, the group of nodes can be nodes arranged in a distributed computing hierarchy.

Abstract: A method for managing data. The method includes obtaining, by a universal connector, a backup request for a file, in response to the backup request: determining a number of read buffers required by a network attached storage (NAS) server to read data associated with the file, generating a set of file read requests based on the number of read buffers, sending, to the NAS server, a data request for the file that includes the set of file read requests, obtaining a data response from the NAS server, wherein the data response comprises a portion of data associated with the file, populating a data array using the data associated with the file, and initiating a backup of the file using the data array.

Abstract: A data processing system implements identifying one-way correctness issues in datasets of large computing systems including a first computing system and a second computing system. The second computing system is associated with a dependent dataset that includes references to data in a second datastore associated with the first computing system. These references updated in response to changes to the data referred to by these references. However, errors can cause the two datasets to become out of sync. The system herein implements automatically identifying unattached items in a dependent dataset that references items in a reference dataset that is no longer present in the reference dataset by comparing the dependent dataset with the reference dataset, and automatically causing the second computing system to delete the unattached items from the dependent dataset.

Abstract: A file-level snapshot access service provides direct access to individual files included in a snapshot for virtual volume of a block-storage service without requiring a volume to be re-created from the snapshot, attached to a computing device, or mounted in a file system. For example, a user/client may directly retrieve individual files from specified snapshots via a user interface/API of the file-level snapshot access service. Additionally, the file-level snapshot access service is configured to provide a listing of files included in a given snapshot. In some embodiments, a file-level snapshot access service may provide direct access to individual files included in snapshots generated for other types of storage systems, such as an object-based storage system.

Abstract: A computer-implemented method of constructing a minimal perfect hash function includes selecting a set H of k hash functions over a set Y of n keys and building a bipartite graph from keys to hash values using the set Y of keys and the set H of hash functions. Each edge of the bipartite graph has a weight equal to an index of a hash function associated with that edge. The method also includes determining a minimal weight perfect matching of the bipartite graph and generating an XORSAT filter using the minimal weight perfect matching of the bipartite graph, such that a minimal perfect hash function can be performed on an element by querying the XORSAT filter for a result associated with the element.

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: 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: 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: 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: 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: 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 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.