Replication Agent Patents (Class 707/633)
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Patent number: 11960451Abstract: A method for deduplication applicable to a file chunked into a plurality of deduplicated chunks is provided and includes: defining a calculation range in the file according to types of the chunks in the file, where the calculation range includes a plurality of consecutive chunks in the file; generating an evaluation value according to the types of the chunks in the calculation range to determine whether to mark the chunks in the calculation range; and re-chunking and deduplicating the marked chunks in the file. A computer-readable medium and a file system corresponding to the method for deduplication are also provided.Type: GrantFiled: November 9, 2021Date of Patent: April 16, 2024Assignee: QNAP Systems, Inc.Inventors: Tsung-Han Chiang, Jing-Wei Su, Chin-Tsung Cheng
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Patent number: 11860907Abstract: A method for shuffle-less reclustering of clustered tables includes receiving a first and second group of clustered data blocks sorted by a clustering key value. A range of clustering key values of one or more the data blocks in the second group overlaps with the range of clustering key values of a data block in the first group. The method also includes generating split points for partitioning the first and second groups of clustered data blocks into a third group. The method also includes partitioning using the split points, the first and second groups into the third group. Each data block in the third group includes a range of clustering key values that do not overlap with any other data block in the third group. Each split point defines an upper limit or lower limit for the range of clustering key values a data block in the third group.Type: GrantFiled: August 3, 2022Date of Patent: January 2, 2024Assignee: Google LLCInventors: Hua Zhang, Pavan Edara, Nhan Nguyen
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Patent number: 11775392Abstract: Systems, methods, and computer readable storage mediums for performing remote replication including receiving, by a target storage system, an indication that a dataset stored on a source storage system will be replicated to the target storage system; identifying, by the target storage system, portions of the dataset that are not already stored on the target storage system; and initiating, by the target storage system, replication of one or more of the portions of the dataset that are not already stored on the target storage system from a source other than the source storage system.Type: GrantFiled: June 29, 2021Date of Patent: October 3, 2023Assignee: PURE STORAGE, INC.Inventors: Benjamin Borowiec, Steve Hodgson, Ethan L. Miller
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Patent number: 11775503Abstract: A system and method for global data de-duplication in a cloud storage environment utilizing a plurality of data centers is provided. Each cloud storage gateway appliance divides a data stream into a plurality of data objects and generates a content-based hash value as a key for each data object. An IMMUTABLE PUT operation is utilized to store the data object at the associated key within the cloud.Type: GrantFiled: April 11, 2022Date of Patent: October 3, 2023Assignee: NetApp, Inc.Inventors: Kiran Nenmeli Srinivasan, Kishore Kasi Udayashankar, Swetha Krishnan
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Patent number: 11709800Abstract: One example method includes optimizing client-side deduplication. When backing up a client, an overwrite ratio is determined based on a size of actual changes made to a volume and a size indicated by changes in a change log. Client-side deduplication is enabled or disabled based on a value of the overwrite ratio.Type: GrantFiled: October 1, 2021Date of Patent: July 25, 2023Assignee: EMC IP HOLDING COMPANY LLCInventors: Jehuda Shemer, Maxim Drobachevsky, Zion Drori
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Patent number: 11645241Abstract: Techniques herein store database blocks (DBBs) in byte-addressable persistent memory (PMEM) and prevent tearing without deadlocking or waiting. In an embodiment, a computer hosts a DBMS. A reader process of the DBMS obtains, without locking and from metadata in PMEM, a first memory address for directly accessing a current version, which is a particular version, of a DBB in PMEM. Concurrently and without locking: a) the reader process reads the particular version of the DBB in PMEM, and b) a writer process of the DBMS replaces, in the metadata in PMEM, the first memory address with a second memory address for directly accessing a new version of the DBB in PMEM. In an embodiment, a computer performs without locking: a) storing, in PMEM, a DBB, b) copying into volatile memory, or reading, an image of the DBB, and c) detecting whether the image of the DBB is torn.Type: GrantFiled: March 9, 2020Date of Patent: May 9, 2023Assignee: Oracle International CorporationInventors: J. William Lee, William H. Bridge, Jr., Ankur Kemkar, Vipin Gokhale, Sivaram Prasad Soma, Vishvesh Mohanarangam Selvakumaar, Juan R. Loaiza, Wei-Ming Hu, Neil J. S. MacNaughton, Adam Y. Lee
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Patent number: 11436261Abstract: A method for shuffle-less reclustering of clustered tables includes receiving a first and second group of clustered data blocks sorted by a clustering key value. A range of clustering key values of one or more the data blocks in the second group overlaps with the range of clustering key values of a data block in the first group. The method also includes generating split points for partitioning the first and second groups of clustered data blocks into a third group. The method also includes partitioning using the split points, the first and second groups into the third group. Each data block in the third group includes a range of clustering key values that do not overlap with any other data block in the third group. Each split point defines an upper limit or lower limit for the range of clustering key values a data block in the third group.Type: GrantFiled: April 14, 2020Date of Patent: September 6, 2022Assignee: Google LLCInventors: Hua Zhang, Pavan Edara, Nhan Nguyen
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Patent number: 10839016Abstract: Techniques for storing block-based metadata in a storage system are provided. A method includes (a) receiving a request to write a block of data to a logical address, (b) assigning a physical address where the block of data is to be stored, (c) creating a metadata entry for the block of data, the metadata entry including the physical address, (d) storing a key-value pair within a sorted key-value structure (SKVS) of an ordered plurality of SKVSes, each SKVS having a unique identifier, the key-value pair including the logical address as key and the metadata entry as value; (e) placing an entry within a Cuckoo filter based on the key, the entry including the identifier of the SKVS in which the key-value pair was stored, and (f) subsequently accessing the data by: (1) locating the metadata entry with reference to the Cuckoo filter and (2) locating the data with reference to the physical address in the metadata entry.Type: GrantFiled: October 31, 2018Date of Patent: November 17, 2020Assignee: EMC IP Holding Company LLCInventor: Joris Wils
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Patent number: 10565071Abstract: A processor-implemented method for selective data replication recovery in a heterogeneous environment is provided, including a source agent, a target agent, and data replication recoverer (DRR) agent. The method includes receiving, by a DRR agent, one or more committed transaction records from a source agent, which is configured to receive the one or more committed transaction records from a source database. The DRR agent creates data and metadata records from the received one or more committed transaction records, and saves the data and the metadata records in a data replication repository. In response to receiving a request to recover a target database, the DRR agent selectively recovers target database using either one or more individual transactions or a bookmark.Type: GrantFiled: May 1, 2017Date of Patent: February 18, 2020Assignee: International Business Machines CorporationInventors: Pravin K. Kedia, Nirmal Kumar
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Patent number: 10261862Abstract: According to an aspect, a database management system (DBMS) is operated to perform data replication. The DBMS includes a source database and a target database. The source database includes a plurality of first tables respectively comprising one or more first columns, and the target database includes a plurality of second tables respectively comprising one or more second columns. Each of multiple ones of the first columns is mapped to one of the second columns, and each one of the second columns is adapted to store replicated data changes of the first column mapped to the second column. Each of the second columns has an assigned update time, the update time being a moment in time when the second column most recently received incremental data changes from its mapped first column. The DBMS operates to process requested database statements while providing data replication.Type: GrantFiled: November 22, 2017Date of Patent: April 16, 2019Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Namik Hrle, Daniel Martin, Chandrasekaran Mohan, Sunil K. Sarin, James D. Spyker, Yongfeng Yao
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Patent number: 9922109Abstract: A column set server adapts to data use patterns by data consumers by modifying how a table produced by a data producer is partitioned into separate column sets to reduce the waste incurred in accessing the data by multiple consumers of the data. For example, the column set server adjusts a column set distribution when a new consumer process is added, when one is retired, or when relative data set size ratios change.Type: GrantFiled: June 26, 2015Date of Patent: March 20, 2018Assignee: Quantcast CorporationInventors: Silvius V. Rus, Thileepan Subramaniam
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Patent number: 9661048Abstract: Asset streaming and delivery including intercepting, at an asset streaming client, a request to exploit an asset virtualized on the asset streaming client. The asset is identified and an asset snapshot of the asset is obtained. Portions of the asset needed to exploit the asset according to the intercepted request exploit the asset are determined from an asset snapshot of the asset. The portions of the asset needed to exploit the asset according to the intercepted request are obtained and the asset is exploited according to the intercepted request using the portions of the asset.Type: GrantFiled: January 21, 2014Date of Patent: May 23, 2017Assignee: Numecent Holding, Inc.Inventors: Osman Kent, Arthur S. Hitomi
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Patent number: 9652157Abstract: A method, according to one embodiment, includes: receiving a recirculation command, performing a coarse page lookup to determine valid ones of logical pages to be recirculated, issuing write commands for the valid logical pages, requesting performance of a fine page lookup on source physical addresses containing the valid logical pages to verify the valid logical pages, receiving verified valid logical pages resulting from the fine page lookup, and sending the write commands corresponding to the verified valid logical pages. Other systems, methods, and computer program products are described in additional embodiments.Type: GrantFiled: March 19, 2015Date of Patent: May 16, 2017Assignee: International Business Machines CorporationInventors: Timothy J. Fisher, Lincoln T. Simmons, Adalberto G. Yanes
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Patent number: 8972346Abstract: Operating a parallel database server system, where the database server system comprises at least two database servers and one data source. A client identifier is received from a client requesting services from one of said database servers. Information associated with said client is retrieved. The client is allocated to one of said database servers based on the retrieved information.Type: GrantFiled: December 1, 2010Date of Patent: March 3, 2015Assignee: International Business Machines CorporationInventors: James W Pickel, Wolfgang Reichert, Johannes Schuetzner
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Patent number: 8943023Abstract: Methods and apparatus for receiving uploaded data from a sender at a receiver. A data deduplication technique is described that may reduce the bandwidth used in uploading data from the sender to the receiver. In the technique, the receiver, rather than the sender, maintains a fingerprint dictionary for previously uploaded data. When a sender has additional data to be uploaded, the sender extracts fingerprints for units of the data and sends the fingerprints to the receiver. The receiver checks its fingerprint dictionary to determine the data units to be uploaded and notifies the sender of the identified units, which then sends the identified units of data to the receiver. The technique may, for example, be applied in virtualized data store systems to reduce bandwidth usage in uploading data.Type: GrantFiled: December 29, 2010Date of Patent: January 27, 2015Assignee: Amazon Technologies, Inc.Inventor: James Christopher Sorenson, III
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Patent number: 8930311Abstract: The disclosed techniques enable push-based piggybacking of a source-driven logical replication system. Logical replication of a data set (e.g., a snapshot) from a source node to a destination node can be achieved from a source-driven system while preserving the effects of storage efficiency operations (deduplication) applied at the source node. However, if missing data extents are detected at the destination, the destination has an extent pulling problem as the destination may not have knowledge of the physical layout on the source-side and/or mechanisms for requesting extents. The techniques overcome the extent pulling problem in a source-driven replication system by introducing specific protocols for obtaining missing extents within an existing replication environment by piggybacking data pushes from the source.Type: GrantFiled: December 14, 2012Date of Patent: January 6, 2015Assignee: NetApp, Inc.Inventors: Xin Wang, Vijay Deshmukh, Kiyoshi Komatsu, Jonathan Curley, Laura Beegle, Srishylam Simharajan, Gurmeet Singh
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Publication number: 20140344221Abstract: Methods, systems, and computer program products are provided for partitioning online databases. Online database operations, such as, for example, SPLIT, MERGE, and DROP, are used to alter the arrangement of partitions in a federated database. A SPLIT operation splits rows at one partition across a plurality of other partitions. A MERGE operation merges rows at a plurality of partitions in to one partition. A DROP operation shifts responsibility for rows of data from one partition to another partition and then drops the rows from the one partition.Type: ApplicationFiled: August 5, 2014Publication date: November 20, 2014Inventors: Lev Novik, Andrew Kimball, Tony Petrossian, Cihangir Biyikoglu, Santeri Olavi Voutilainen, Tomas Talius, Istvan Cseri, Joachim Hammer, Jason D. Clark, Marc T. Friedman, Ajay Kalhan
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Patent number: 8892518Abstract: A computing system. The system comprises enterprise computers, each enterprise computer executing at least one instance of an enterprise application and executing one logging agent associated with each instance of the enterprise application; logging computers each executing at least one instance of a logging distribution application that is configured to receive logs from the logging agent application instances; and a centralized log repository computer that executes a log file manager. Each of the logging agent applications analyze a processing load of the logging computers and transmit logs to a logging computer that the logging agent application adaptively selects based on the analysis by the logging agent application of the processing load of the logging computers, wherein each logging distribution application is configured to forward logs received from logging agent applications to the centralized log repository computer, and wherein the log file manager writes the logs into log files.Type: GrantFiled: July 27, 2012Date of Patent: November 18, 2014Assignee: Sprint Communications Company L.P.Inventor: Suresh Kannan
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Publication number: 20140279892Abstract: Systems for replication group partitioning include a workload profiling module configured to analyze historical workload data for a plurality of data elements to identify and categorize one or more transaction patterns; and a recommendation module configured to generate a recommended partitioning of the plurality of data elements into one or more replication groups, based on the one or more transaction patterns, that are optimized toward a partitioning goal.Type: ApplicationFiled: August 16, 2013Publication date: September 18, 2014Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: SERGE BOURBONNAIS, YOU-CHIN FUH, YI JIN, XIAO LI, HONG MIN, MIAO ZHENG
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Publication number: 20140279891Abstract: Methods and systems for replication group partitioning include analyzing historical workload data for a plurality of data elements to generate one or more transaction patterns and generating a recommended partitioning of the plurality of data elements into one or more replication groups, based on the one or more transaction patterns, that are optimized toward a partitioning goal.Type: ApplicationFiled: March 13, 2013Publication date: September 18, 2014Applicant: INTERNATIONAL BUSINESS MACHINES COPORATIONInventor: INTERNATIONAL BUSINESS MACHINES CORPORATION
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Patent number: 8832024Abstract: Methods and apparatuses for performing simplified copy offload operations are provided. In one exemplary embodiment, a method includes creating a persistent point-in-time image of a data set of a source storage device in response to receiving a token request for a copy offload operation from a host. Creating the persistent point-in-time image includes generating pointers to data blocks of the data set, but does not include duplicating the data blocks. The method also includes transmitting a token that is a representation of the persistent point-in-time image to the host in response to the request.Type: GrantFiled: October 26, 2012Date of Patent: September 9, 2014Assignee: NetApp, Inc.Inventors: Frederick E. Knight, John Meneghini, Arun Kumar Rajendran, Santosh A. Rao
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Patent number: 8805784Abstract: The present invention extends to methods, systems, and computer program products for partitioning online databases. Online database operations, such as, for example, SPLIT, MERGE, and DROP, are used to alter the arrangement of partitions in a federated database. A SPLIT operation splits rows at one partition across a plurality of other partitions. A MERGE operation merges rows at a plurality of partitions in to one partition. A DROP operation shifts responsibility for rows of data from one partition to another partition and then drops the rows from the one partition.Type: GrantFiled: June 21, 2011Date of Patent: August 12, 2014Assignee: Microsoft CorporationInventors: Lev Novik, Andrew Kimball, Tony Petrossian, Cihangir Biyikoglu, Santeri Olavi Voutilainen, Tomas Talius, Istvan Cseri, Joachim Hammer, Jason D. Clark, Marc T. Friedman, Ajay Kalhan
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Patent number: 8782630Abstract: An upgrade of an application product is installed to a first location in a shared environment that is different than a second location in the shared environment. An indication of the newer version of the application product and an indication of the first location are recorded in a registry that comprises indications of a plurality of application products and locations corresponding thereto. Metadata and binding information are obtained from an instance of the previous version of the application product while the instance of the previous version of the application product continues running. The metadata and the binding information are instantiated for an instance of the newer version of the application product in execution space thereof. Work is diverted work from the instance of the previous version of the application product to the instance of the newer version of the application product while both instances continue running in the shared environment.Type: GrantFiled: June 30, 2011Date of Patent: July 15, 2014Assignee: International Business Machines CorporationInventors: Samar Choudhary, Hao Q. La, Jean-Marc Paulin, Shikha Srivastava
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Patent number: 8762992Abstract: A computer-implemented method for safely migrating to virtualized platforms may include (1) identifying a virtual machine that is a target of a physical-to-virtual conversion from a physical server, (2) determining that the physical-to-virtual conversion includes at least one future step before the physical-to-virtual conversion is complete, (3) based on determining that the physical-to-virtual conversion includes the future step, creating a snapshot of the virtual machine before the future step, and (4) reverting the virtual machine to the snapshot before the future step. Various other methods, systems, and computer-readable media are also disclosed.Type: GrantFiled: December 22, 2011Date of Patent: June 24, 2014Assignee: Symantec CorporationInventors: Lokesha Krishnamurthy, Steven E. Mohl
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Patent number: 8712959Abstract: In one embodiment, a method and apparatus for collaborative data redundancy for configuration management database is disclosed. The method includes requesting, by a server of a configuration tracking system, an agent of the configuration tracking system to retrieve asset data when a copy of the asset data located in the server becomes corrupted, retrieving by the agent the requested asset data from one or more assets, and transferring by the agent the asset data to the server without utilizing data redundancy services performed outside of the configuration tracking system. Other embodiments are also disclosed.Type: GrantFiled: September 28, 2005Date of Patent: April 29, 2014Assignee: Oracle America, Inc.Inventors: Swee B. Lim, Michael J. Wookey
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Patent number: 8712963Abstract: Techniques for replicating data chunks in a storage system are described herein. In one embodiment, in response to a request for replicating data chunks of a source storage system having a first average chunk size to a target storage system having a second average chunk size, a new chunk size is determined based on metadata of the data chunks in view of an average chunk size of the target storage system. The data chunks are resized based on the new chunk size to generate resized data chunks. The resized data chunks are transmitted from the source storage system to the target storage system for replication.Type: GrantFiled: December 22, 2011Date of Patent: April 29, 2014Assignee: EMC CorporationInventors: Frederick Douglis, Philip N. Shilane, Grant Wallace
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Patent number: 8676756Abstract: A multi-tiered replicated process database and corresponding method are disclosed for supporting replication between tiers. The multi-tiered replicated process database comprises a tier one (T1) database server computer including a process history database and a replication service. The replication service includes a set of accumulators. Each accumulator is adapted to render a summary T2 database tag data structure from a set of data values retrieved from the process history database for a specified T1 database tag. The replicated database system also includes a tier two (T2) database server computer comprising a consolidated database that includes process data replicated from a set of T1 database servers. At least a portion of the process data replicated from the set of T1 database servers is summary T2 database tag data rendered by the set of accumulators.Type: GrantFiled: May 17, 2010Date of Patent: March 18, 2014Assignee: Invensys Systems, Inc.Inventors: Brian Erickson, Abhijit Manushree, Yevgeny Naryzhny, Vinay Kamath, Clement Lie, Elliot Middleton
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Patent number: 8620864Abstract: An item data management server having the capability to create a physical item data record for a physical item in the control of a user based upon a data object of an accessible collection. The item data management server presents a clone command query to the user terminal, and receives, in response, a clone command query response that corresponds to and identifies a data object having a plurality of attributes. The item data management server generates a cloned physical item data record based upon the data object. The cloned physical item data record includes at least a portion of the plurality of attributes of the data object, and a second plurality of attributes associated with the user. The item data management server generates a web page including the cloned physical item data record, and presents the web page to the user terminal.Type: GrantFiled: December 14, 2006Date of Patent: December 31, 2013Assignee: iTaggit, Inc.Inventors: David Altounian, Charles Zeller, Sara Fox
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Patent number: 8615486Abstract: Architecture for replicating a database through log shipping. A replication service replicates data using one or more new internal application program interfaces (APIs), a replay configuration API which abstracts configuration information for each destination (or target) instance. APIs for log file management as part of the replication process are provided for opening communications for log shipping, tracking success of log shipping and closing out log shipping communications. Log shipping APIs are also provided for log truncation control. A ship control object is provided as a base class which includes an API for other components of the replication service to operate on log files when the log files are placed into a log directory. The ship control API is utilized by the replication service and for interaction with storage system log files.Type: GrantFiled: October 12, 2011Date of Patent: December 24, 2013Assignee: Microsoft CorporationInventors: Alexander R. Wetmore, Laurion Burchall
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Patent number: 8560292Abstract: A system and method for simulating a state of a distributed storage system is provided. A current state of a distributed storage system and replication policies for the objects in the distributed storage system is obtained. Proposed modifications to the current state of the distributed storage system are received. The state of the distributed storage system is simulated over time based on the current state of the distributed storage system, the replication policies for the objects in the distributed storage system, and the proposed modifications to the current state of the distributed storage system. Then reports relating to the time evolution of the current state of the distributed storage system are generated based on the simulation.Type: GrantFiled: February 7, 2011Date of Patent: October 15, 2013Assignee: Google Inc.Inventors: Yonatan Zunger, Alexandre Drobychev, Alexander Kesselman, Rebekah C. Vickrey, Frank C. Dachille, George Datuashvili
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Patent number: 8516149Abstract: An information retrieval system having: a client adapted for accessing a plurality of file sets stored on one of a plurality of file servers; a plurality of file servers configured to operate with a federated file system namespace; and a memory for storing re-direction information accessible by the client for identifying a request issued by the client for a file set at a first location in the namespace where the file set is located at a second, different location on one of the file servers and wherein the client in examining the re-direction information in the memory, re-directs the request to the second location in accordance with the re-direction information.Type: GrantFiled: December 17, 2010Date of Patent: August 20, 2013Assignee: EMC CorporationInventor: Christopher Howard Edmett Stacey
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Patent number: 8504595Abstract: Example methods and apparatus associated with data de-duplication for a global coherent de-duplication repository are provided. In one example a request related to data de-duplication is transmitted to a plurality of nodes associated with the global coherent de-duplication repository. Responses to the request are received from at least a subset of nodes in the plurality of nodes. Affinity scores are assigned to nodes of the subset of nodes based, at least in part, on affinity data from the responses. A node is selected to perform the request related to de-duplication from the subset of nodes of the plurality of nodes based, at least in part, on the affinity score assigned to the nodes.Type: GrantFiled: December 7, 2011Date of Patent: August 6, 2013Inventor: Jeffrey Tofano
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Patent number: 8478723Abstract: An example method for writing and reading data in electrically erasable and programmable nonvolatile memory (EEPROM) cells may include writing, in erased blocks of a first memory zone, data each having a logical address defined in relation to a virtual memory; writing, in a second memory zone, metadata structures associated with the data present in the first memory zone, configuring, in a volatile memory zone, for each logical address of a data stored in the first memory zone, addresses of metadata structures comprising the logical address, reading the look-up table and then reading metadata structures that the look-up table designates, to find, from the logical address of a data, an address in the first memory zone of a block containing a valid data having the logical address.Type: GrantFiled: September 21, 2010Date of Patent: July 2, 2013Assignee: STMicroelectronics (Rousset) SASInventor: Hubert Rousseau
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Patent number: 8346786Abstract: An information processing system includes an acceptance section, a first processing section, a conversion section and a second processing section. The acceptance section accepts first storage location information that is indicative of where a first electronic file in a first storage unit is stored. The first processing section processes the first electronic file in accordance with a first processing content. The conversion section converts the first storage location information to second storage location information that is indicative of where a second electronic file in a second storage unit is stored. The second electronic file has an identical content as that of the first electronic file. The second processing section processes the second electronic file in accordance with a second processing content.Type: GrantFiled: August 26, 2009Date of Patent: January 1, 2013Assignee: Fuji Xerox Co., Ltd.Inventor: Shoji Sakamoto
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Patent number: 8341366Abstract: Provided are a method, system, and article of manufacture for splitting writes between a storage controller and replication engine. A splitter executing in a storage controller manages access to primary volumes. An initialization command is received to communicate with a replication engine. A replication command is received for one primary volume and the primary volume is indicated as subject to replication. A write request is received to write data to a target primary volume of the primary volumes that is indicated as subject to the replication. The data in the write request is written to the target primary volume. The data in the write request is sent to the replication engine. The replication engine executes a copy services function associated with the target primary volume to write the data to a replication engine volume.Type: GrantFiled: January 23, 2012Date of Patent: December 25, 2012Assignee: International Business Machines CorporationInventors: Robert Francis Bartfai, Kenneth Wayne Boyd, James Chien-Chiung Chen, Kenneth Fairclough Day, III, Shachar Fienblit, Gregory Edward McBride, David W. Messina, Robert Bruce Nicholson, Gail Andrea Spear
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Patent number: 8332356Abstract: A networked system includes a master agent and at least one state agent. When upgrading the software of the master agent and the state agents, only the binary files at a shared location at the master agent are changed. To accomplish the change, a watchdog process at the state agent watches for the presence of a marker file at the master agent. The master agent produces the marker file if the master agent will accomplish a software upgrade. When the marker file is present, the state agent stops execution. The watchdog continues to monitor the presence of the marker file until the marker file is deleted at the end of the installation process. When the marker file is deleted, the state agent installs the new binary files associated with the software upgrade and resumes execution.Type: GrantFiled: May 12, 2009Date of Patent: December 11, 2012Assignee: Oracle International CorporationInventors: Shilpa Thergaonkar, Eunhei Jang, Anupama Vale
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Publication number: 20120310885Abstract: Systems, methods and computer program product embodiments for auto-correction in database replication are disclosed herein. An embodiment includes receiving a log record of one or more database row changes on a table marked for replication. From the received log record, one or more insert operations on the marked table are identified. Each identified insert operation is automatically replaced with a first pair of operations, where each first pair comprises a delete operation associated with a new insert operation. Each first pair, when executed at a replicate database, acts to delete data at a first location identified by each identified insert operation prior to inserting data of the new insert operation at the first location.Type: ApplicationFiled: June 1, 2011Publication date: December 6, 2012Applicant: Sybase Inc.Inventors: Chengzi XU, Stephen C. Shepherd
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Patent number: 8301589Abstract: System and method for assignment of unique identifiers in a distributed environment. In a distributed system having a plurality of nodes, a method for allocating identifiers comprises steps of: allocating a pool of identifiers for use; maintaining lists of free identifiers in the pool at participating nodes; obtaining at a first node permission to update the lists of free identifiers; upon receiving permission to update the lists, allocating for the first node a set of identifiers from the lists; updating the lists of free identifiers to reflect allocation of the set of identifiers for the first node; sending the updated lists from the first node to other participating nodes; upon receiving the updated lists of free identifiers at each other participating node, updating each other participating node's respective copy of the lists of free identifiers; and relinquishing the first node's permission to update the lists of free identifiers.Type: GrantFiled: March 26, 2007Date of Patent: October 30, 2012Assignee: Sybase, Inc.Inventors: Raj Kumar Sen, Gangavara Prasad Varakur
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Patent number: 8250031Abstract: The local storage performs remote copy to the remote storage. For low traffic failback remote copy, the remote storage performs a delta copy to the local storage, the delta being the difference between the remote storage and local storage. The local storage backs up snapshot data. The remote storage resolves the difference of the snapshot of the local storage and the remote storage. The difference resolution method can take one of several approaches. First, the system informs the timing of snapshot of the local storage to the remote storage and records the accessed area of the data. Second, the system informs the timing of snapshot of the local storage to the remote storage, and the remote storage makes a snapshot and compares the snapshot and remote copied data. Third, the system compares the local data and remote copy data with hashed data.Type: GrantFiled: August 26, 2008Date of Patent: August 21, 2012Assignee: Hitachi, Ltd.Inventor: Tomohiro Kawaguchi
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Patent number: 8234246Abstract: A method and apparatus comprising a replication appliance that is coupled to a backup media server. The media server communicates with the replication appliance via either an in-band communication or an out-of-band communication that informs the replication appliance of the completion of a backup within backup software. Upon receiving the notification of the event, the replication appliance will replicate the change data forming a replicated image of that data for storage either locally or remotely from the replication appliance. This replicated image may be used for archival purposes.Type: GrantFiled: June 27, 2008Date of Patent: July 31, 2012Assignee: Symantec CorporationInventor: Girish S. Jorapurkar
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Patent number: 8214428Abstract: A backup cache on a client is prepopulated with fingerprints corresponding to data stored on a backup server. A plurality of fingerprints of data are received from the client, each received fingerprint corresponding to data present on the client which is subject to backup to the server. For each received fingerprint, an attempt is made to locate data corresponding to the received fingerprint stored on the backup server. Responsive to locating data corresponding to a received fingerprint stored on the backup server, data stored on the backup server considered to be “in the neighborhood” of the located data is identified. Fingerprints (e.g., hashes) identifying data stored on the backup server in the neighborhood of the located data are created and transmitted to the client, for prepopulating the backup cache on the client.Type: GrantFiled: May 18, 2010Date of Patent: July 3, 2012Assignee: Symantec CorporationInventor: Mark Christiaens
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Patent number: 8200631Abstract: A method, device, and system for resetting snapshots are provided. The reset of a snapshot incorporates the traditional snapshot delete and snapshot create operations into a single operation. Additionally, a snapshot created under the reset operation may receive an array partition from a snapshot being deleted under the same snapshot reset operation thereby retaining its identifying characteristics.Type: GrantFiled: May 15, 2010Date of Patent: June 12, 2012Assignee: Dot Hill Systems CorporationInventors: James George Wayda, Kent Lee, Ngoclan Thi Vu, Elizabeth Guadalupe Rodriguez
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Publication number: 20120130948Abstract: An item data management server having the capability to create a physical item data record for a physical item in the control of a user based upon a data object of an accessible collection. The item data management server presents a clone command query to the user terminal, and receives, in response, a clone command query response that corresponds to and identifies a data object having a plurality of attributes. The item data management server generates a cloned physical item data record based upon the data object. The cloned physical item data record includes at least a portion of the plurality of attributes of the data object, and a second plurality of attributes associated with the user. The item data management server generates a web page including the cloned physical item data record, and presents the web page to the user terminal.Type: ApplicationFiled: December 14, 2006Publication date: May 24, 2012Applicant: ITAGGIT, INC.Inventors: DAVID ALTOUNIAN, CHARLES ZELLER, SARA FOX
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Publication number: 20120109892Abstract: The present invention extends to methods, systems, and computer program products for partitioning online databases. Online database operations, such as, for example, SPLIT, MERGE, and DROP, are used to alter the arrangement of partitions in a federated database. A SPLIT operation splits rows at one partition across a plurality of other partitions. A MERGE operation merges rows at a plurality of partitions in to one partition. A DROP operation shifts responsibility for rows of data from one partition to another partition and then drops the rows from the one partition.Type: ApplicationFiled: June 21, 2011Publication date: May 3, 2012Applicant: Microsoft CorporationInventors: Lev Novik, Andrew Kimball, Tony Petrossian, Cihangir Biyikoglu, Santeri Olavi Voutilainen, Tomas Talius, Istvan Cseri, Joachim Hammer, Jason D. Clark, Marc T. Friedman, Ajay Kalhan
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Patent number: 8145598Abstract: Methods and systems are disclosed that relate to single instance storage of asset parts utilizing a back reference count associated with each asset part. Entries in a journal associated with the asset parts reflect the intention to increment or decrement an asset part's back reference count. The journal may be used to maintain an accurate and reliable reference count for asset parts replicated across multiple disk drives in a distributed storage system, where the replication is structured to reduce the risk of data loss in the event of a disk drive failure. The journal entries may comprise generation numbers used to maintain a back reference count associated with an asset part and to verify a back reference count associated with an asset part.Type: GrantFiled: February 23, 2009Date of Patent: March 27, 2012Assignee: Iron Mountain IncorporatedInventors: Peter D. Beaman, Tuyen M. Tran, Robert S. Newson
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Patent number: 8131957Abstract: Provided are a method, system, and article of manufacture for splitting writes between a storage controller and replication engine. A splitter executing in a storage controller manages access to primary volumes. An initialization command is received to communicate with a replication engine. A replication command is received for one primary volume and the primary volume is indicated as subject to replication. A write request is received to write data to a target primary volume of the primary volumes that is indicated as subject to the replication. The data in the write request is written to the target primary volume. The data in the write request is sent to the replication engine. The replication engine executes a copy services function associated with the target primary volume to write the data to a replication engine volume.Type: GrantFiled: August 16, 2007Date of Patent: March 6, 2012Assignee: International Business Machines CorporationInventors: Robert Francis Bartfai, Kenneth Wayne Boyd, James Chien-Chiung Chen, Kenneth Fairclough Day, III, Shachar Fienblit, Gregory Edward McBride, David W. Messina, Robert Bruce Nicholson, Gail Andrea Spear
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Patent number: 8126844Abstract: A replicated set of data is processed by receiving at a target, from one of a plurality of replication processing threads, a received batch of one or more non-synchronization tasks. It is determined that the received batch comprises a next batch to be performed at the target and the non-synchronization tasks included in the batch are performed in a task order.Type: GrantFiled: December 21, 2010Date of Patent: February 28, 2012Assignee: EMC CorporationInventor: Robert K. Kast
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Patent number: 8103628Abstract: A data processing apparatus, comprising a metadata store storing information about files that are stored in a distributed data storage system, and comprising a class database; one or more processing units; logic configured for receiving and storing in the class database a definition of a class of data storage servers comprising one or more subclasses each comprising one or more server selection criteria; associating the class with one or more directories of the data storage system; in response to a data client storing a data file in a directory, binding the class to the data file, determining and storing a set of identifiers of one or more data storage servers in the system that match the server selection criteria, and providing the set of identifiers to the data client.Type: GrantFiled: April 9, 2008Date of Patent: January 24, 2012Assignee: Harmonic Inc.Inventors: John Howe, Alexander Mitaru, Charles Morris, Don Harschadath Wanigasekara-Mohotti
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Patent number: 8069141Abstract: Architecture for replicating a database through log shipping. A replication service replicates data using one or more new internal application program interfaces (APIs), a replay configuration API which abstracts configuration information for each destination (or target) instance. APIs for log file management as part of the replication process are provided for opening communications for log shipping, tracking success of log shipping and closing out log shipping communications. Log shipping APIs are also provided for log truncation control. A ship control object is provided as a base class which includes an API for other components of the replication service to operate on log files when the log files are placed into a log directory. The ship control API is utilized by the replication service and for interaction with storage system log files.Type: GrantFiled: March 12, 2007Date of Patent: November 29, 2011Assignee: Microsoft CorporationInventors: Alexander R. Wetmore, Laurion Burchall
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Patent number: 8055615Abstract: Methods and apparatus are described for a horizontally scalable high performance object storage architecture. Metadata are completely decoupled from object storage. Instead of file names, users are given a locator when the object is uploaded and committed. Users can store the locator along with their own metadata or embed it directly in the static content. Clients can choose which storage nodes to store data on based on dynamic measures of node performance. Since there is no coupling among storage servers, performance can scale horizontally by adding more nodes. The decoupling also allows the front end services and storage to scale independently. High service availability is achieved by object-level synchronous replication and having no single point of failure. Failed nodes are rebuilt using copies of data in other nodes without taking the cluster offline. In addition to the replication, the ability to add or remove nodes on-line reduces maintenance-related service downtime.Type: GrantFiled: August 25, 2009Date of Patent: November 8, 2011Assignee: Yahoo! Inc.Inventors: Nathaniel David Roberts, Jeanie Zhiling Zheng, Chung Hae Sohn, Kihwal Lee, John Vijoe George