The invention provides systems and methods for continuous back up of data stored on a computer network. To this end the systems of the invention include a synchronization process that replicates selected source data files data stored on the network and to create a corresponding set of replicated data files, called the target data files, that are stored on a back up server. This synchronization process builds a baseline data structure of target data files. In parallel to this synchronization process, the system includes a dynamic replication process that includes a plurality of agents, each of which monitors a portion of the source data files to detect and capture, at the byte-level, changes to the source data files. Each agent may record the changes to a respective journal file, and as the dynamic replication process detects that the journal files contain data, the journal files are transferred or copied to the back up server so that the captured changes can be written to the appropriate ones of the target data files.

Systems and methods for backing up data files

Systems and methods for managing data, such as metadata. In one exemplary method, metadata from files created by several different software applications are captured, and the captured metadata is searched. The type of information in metadata for one type of file differs from the type of information in metadata for another type of file. Other methods are described and data processing systems and machine readable media are also described.

Methods And Systems For Managing Data

A mobile terminal using a plurality of message services and a control method thereof are provided. The mobile terminal includes: a display unit configured to display list information including a plurality of identification items corresponding to a plurality of message windows, respectively, when the plurality of message windows are open for message communication between or among a plurality of conversation participants; and a controller configured to invite at least some of conversation participants of a first message window corresponding to a first identification item to a second message window corresponding to a second identification item when the first identification item, among the plurality of identification items, partially overlaps with the second identification item according to a touch input applied to the display unit.

Mobile terminal and control method thereof

When a network resource request having a domain name is received, it is determined whether the network resource can be located including determining whether the domain name is resolvable. Rather than, or in addition to, displaying an error message or processing a search request in response to determining that a network resource can not be located or of an unresolvable domain name, the domain name can instead be redirected to a registration service where the domain name may automatically be used to perform a registration request and determine domain name availability. When the domain name is not available for registration, domain name registrant information is provided. However, when the domain name is determined available, a registration form is provided. For example, such a domain name in question may be redirected from the autosearch feature of a web browser to a service, which determines that the domain name is available for registration enabling a potential registrant to register the available domain name by selecting a domain name registration provider from a list of domain name registration providers.

Method, product, and apparatus for requesting a network resource

Performing data management operations on replicated data in a computer network. Log entries are generated for data management operations of an application executing on a source system. Consistency point entries are used to indicate a time of a known good, or recoverable, state of the application. A destination system is configured to process a copy of the log and consistency point entries to replicate data in a replication volume, the replicated data being a copy of the application data on the source system. When the replicated data represents a known good state of the application, as determined by the consistency point entries, the destination system(s) may perform a storage operation (e.g., snapshot, backup) to copy the replicated data and to logically associate the copied data with a time information (e.g., time stamp) indicative of the source system time when the application was in the known good state.

Systems and methods for performing data replication

A Web crawler application takes advantage of a document store's ability to provide a content identifier (CID) having a value that is a unique function of the physical storage location of a data object or document, such as a Web page In operation, the crawler first tries to fetch the CID for a document If the CID attribute is not supported by the document store, the crawler fetches the document, filters it to obtain a hash function, and commits the document to an index if the hash function is not present in a history table If the CID is available from the document store, the CID is fetched from the document store The crawler then determines whether the CID is present in the history table, which indicates whether an identical copy of the document in question has already been indexed under a different URL If the CID is present, indicating that the document has already been indexed, the new URL is placed in the history file but the document itself is not retrieved from the document store, nor is it filtered again to obtain a CID If the CID is not present in the history table, the full document is retrieved and indexed The CID data structure is an extension of a known globally unique ID (GUID) Whereas the GUID is a 16-byte number, the CID comprises a 16-byte GUID plus an additional 6-byte number

Method and system for detecting duplicate documents in web crawls

Systems and methods for enforcing access control on secured documents that are stored outside of the direct control of the original application that would normally store and govern access to the documents. Access security can be enforced at a search engine associated with an indexing system that compiles references to documents at any number of network locations. The search engine discloses to the requesting user only those documents that the user is authorized to read. If a document is identified for potential disclosure to a user, and the document's source location has an access control system that is not directly interoperable with a native access control system of the search engine, a security provider at the search engine enforces access control. The security provider, in cooperation with the source location of the document, converts the user context that identifies the requesting user to a format that can be used by the security provider. The security provider also retrieves the access control information from the document's source location. The security provider then applies the user context to the access control information to determine if the user is authorized to read the document.

Enforcing access control on resources at a location other than the source location

A Web crawler creates an index of documents in a document store on a computer network. In an initial crawl, the crawler creates a first full index for the document store. The first full crawl is based on a set of predefined “seed” URLs and crawl restrictions, and involves recursively retrieving each folder/document directly or indirectly linked to the seed URLs. In the process of creating the first full index, the crawler creates a History Table containing a list of URLs for each folder and document found in the first full crawl. The History Table also includes a local commit time (LCT) for each document and a deleted documents count (DDC) and LCT or maximum LCT (MLCT) for each folder (this assumes that the store supports a folder hierarchy and the MLCT, LCT and DDC properties). Thereafter, in an incremental crawl, the crawler determines, for each folder, (1) whether the DDC for that folder has changed and (2) whether the MLCT is more recent than the corresponding value in the History Table. If the DDC has changed, the crawler obtains a full list of items (URLs) in that folder, and compares the list with the URLs in the History Table to identify the deleted documents. The deleted documents are then deleted from the History Table and index. If the MLCT is more recent, the crawler queries the document store for the URLs of linked documents having a LCT more recent than the MLCT in the History Table for the folder. The History Table and index are then updated accordingly to reflect the changes to the document store.

Method and system for incremental web crawling

A method and system for improved monitoring of document changes in a search engine by an indexing program. Once an indexing or other such monitoring program is halted, upon restart the monitoring program needs to update its own files and its indexes to reflect document changes that occurred while halted. A file system such as the Windows NT file system persistently logs document change information on disk in a monotonically increasing, uniquely-numbered persistent record, which further identifies the file that has changed. The method and system utilize the logged change information to efficiently maintain the indexes, and to rapidly update the indexes after a shutdown and subsequent restart.

Monitoring document changes in a file system of documents with the document change information stored in a persistent log

A method and system for improved monitoring of document changes in a search engine, such as by an indexing program. Once an indexing or other such monitoring program is halted, upon restart the monitoring program needs to update its own files, such as its indexes, to reflect document changes that occurred while halted. A file system such as the Windows NT file system persistently logs document change information on disk in a monotonically increasing, uniquely-numbered persistent record, which further identifies the file that has changed. The method and system utilize the logged change information to efficiently maintain the indexes or the like, and to rapidly update the indexes after a shutdown and subsequent restart.

Srikanth Shoroff

Papers

Method and system for detecting duplicate documents in web crawls

Enforcing access control on resources at a location other than the source location

Method and system for incremental web crawling

Monitoring document changes in a file system of documents with the document change information stored in a persistent log

Monitoring document changes with persistent update sequence numbers