Abstract: A folder scan system configured to identify modified folders in a storage module including a plurality of folders during an incremental backup scan is presented. The folder scan system is configured to identify modified folders using a learning-based technique. A related method is also presented.

Abstract: A system and a method for on-demand search of a large data-set is presented. The system includes a data indexer, an index writer, and an index reader. The data indexer is configured to index the data set. The index writer is configured to create a multi-level directory including a plurality of directories having one or more hash partitions. The index writer is further configured to generate a hash table for each directory and write data from the indexed data set into a corresponding hash partition of a directory. The index reader is configured to identify and query a hash partition in each directory based on a search term and a corresponding hash table for the directory. The index reader is further configured to retrieve one or more relevant records, and present the one or more relevant records to a user.

Abstract: A file system and a related method are presented. The file system includes an object storage configured to store file data for one or more files and a plurality of namespace entries corresponding to file data and/or metadata of the one or more files as one or more objects. Each namespace entry of the plurality of namespace entries includes an operation type conducted on the file data and/or metadata captured in a particular snapshot and a version number corresponding to the particular snapshot. The file system further includes an indexing system configured to generate the plurality of namespace entries; store the plurality of namespace entries as one or more objects in the object storage; and identify, in response to a search query, one or more files for retrieval from the object storage based on a list of the plurality of namespace entries sorted on the version numbers.

Abstract: A file system and a related method are presented. The file system includes a data storage including a plurality of data blocks; a merge index including a plurality of namespace entries, wherein the plurality of namespace entries include a plurality of blockmap entries and a plurality of local reference entries; a deduplication database including a plurality of deduplication indices and a plurality of global reference entries for a plurality of datasets; and an indexing system configured to generate the plurality of namespace entries and the plurality of global reference entries.

Abstract: A file system and a related method are presented. The file system includes a data storage including a plurality of data blocks; a merge index including a plurality of namespace entries, wherein the plurality of namespace entries include a plurality of blockmap entries and a plurality of local reference entries; a deduplication database including a plurality of deduplication indices and a plurality of global reference entries for a plurality of datasets; and an indexing system configured to generate the plurality of namespace entries and the plurality of global reference entries.

Abstract: A folder scan system configured to identify modified folders in a storage module including a plurality of folders during an incremental backup scan is presented. The folder scan system is configured to identify modified folders using a learning-based technique. A related method is also presented.

Abstract: A system for estimating one or more data storage parameters and/or statistics in a data storage system is presented. The data storage system includes a plurality of storage containers. The system includes a snapshot module, a container stats aggregator, a synchronization module, a global stats aggregator, and storage stats estimator.

Abstract: A system and a method for on-demand search of a large data-set is presented. The system includes a data indexer, an index writer, and an index reader. The data indexer is configured to index the data set/ The index writer is configured to create a multi-level directory including a plurality of directories having one or more hash partitions. The index writer is further configured to generate a hash table for each directory and write data from the indexed data set into a corresponding hash partition of a directory. The index reader is configured to identify and query a hash partition in each directory based on a search term and a corresponding hash table for the directory. The index reader is further configured to retrieve one or more relevant records, and present the one or more relevant records to a user.

Abstract: A data back-up system configured to back-up one or more data sets from one or more devices to a data back-up server by using a proxy pool is presented. The data back-up system includes a load-balancer configured to distribute the one or more data sets across the proxy pool. The load balancer includes a data receiver configured to receive types of files, number of files, and total size of each file in the one or more data sets; a load estimator configured to estimate a weighted average load of each data set based on the number of files, the total size of each file, a compressibility factor for each file type, and an encryption factor for each file type; and a load distributor configured to distribute the one or more data sets as a plurality of workloads across the proxy pool.

Abstract: A system for selectively restoring data from a data back-up server is presented. The system includes a data access module configured to access a stateN of the data from a primary data source at a point N. The system further includes a log access module configured to access a log of modified meta-data and data blocks (MMDBs), from the primary data source or the data back-up server, corresponding to a data back-up point previous to the point N. The system furthermore includes a data restore module configured to iteratively perform selective restore of the data, based on the stateN and the MMDBs, from the data back-up server to a restore destination, until the data is restored to a stateRP corresponding to a recovery point (RP), as defined by a user. A related method is also presented.

Abstract: System for delivering an event journal during a back-up session in a distributed file system is presented. The system includes an event intake module, a load balancer, a plurality of object creation modules, a journal manager, and a journal service module. Each object creation module of the plurality of object creation modules further includes an ingestor and a drainer. A related method is also presented. The system and method provide for reliable and time-ordered delivery of events in the event journal.

Abstract: A system for estimating one or more data storage parameters and/or statistics in a data storage system is presented. The data storage system includes a plurality of storage containers. The system includes a snapshot module, a container stats aggregator, a synchronization module, a global stats aggregator, and storage stats estimator.

Abstract: A snapshot usage tracking system and method for a versioned storage is provided. The system includes a memory having computer-readable instructions stored therein and a snapshot repository configured to store a plurality of snapshots of a versioned storage. Each of the plurality of snapshots includes one or more data blocks. The system further includes a processor communicatively coupled to the snapshot repository and configured to maintain a set of snapshot counters corresponding to each of previous snapshots created on or before a current snapshot based upon a size of the data blocks that are modified or deleted in the current snapshot.

Abstract: A snapshot usage tracking system and method for a versioned storage is provided. The system includes a memory having computer-readable instructions stored therein and a snapshot repository configured to store a plurality of snapshots of a versioned storage. Each of the plurality of snapshots includes one or more data blocks. The system further includes a processor communicatively coupled to the snapshot repository and configured to maintain a set of snapshot counters corresponding to each of previous snapshots created on or before a current snapshot based upon a size of the data blocks that are modified or deleted in the current snapshot.

Abstract: A method, system, computer system, and computer-readable medium that enable quick recovery from failure of one or more nodes, applications, and/or communication links in a distributed computing environment, such as a cluster. Recovery is facilitated by regularly saving persistent images of the in-memory checkpoint data and/or of distributed shared memory segments. The persistent checkpoint images are written asynchronously so that applications can continue to write data even during creation and/or updating the persistent image and with minimal effect on application performance. Furthermore, multiple updater nodes can simultaneously update the persistent checkpoint image using normal synchronization operations. When one or more nodes fail, the persistent checkpoint image can be read and used to restart the application in the most recently-saved state prior to the failure.