Patents by Inventor Panagiotis Tsirigotis

Panagiotis Tsirigotis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9602344
    Abstract: A software application designed to operate within an enterprise system is modified to operate properly within a system of a third-party provider. In one embodiment, a site manager obtains pertinent information about the software application from the source systems that make up the enterprise system and provides it to a cloud manager, and the cloud manager uses the information to generate a modified version of the software application for use on the cloud provider. The modification may include operations such as driver injection, file system mounting customization, customization of hostname-to-network address mappings, and boot image creation. Secure connections may also be established between the enterprise system and third-party provider to allow the application running on the third-party provider to access the services of the enterprise system.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: March 21, 2017
    Assignee: CLOUDVELOX, INC.
    Inventors: Anand Iyengar, Rajeev Chawla, Raman Chawla, Panagiotis Tsirigotis, Jun Kang Chin, Chung-Shang Shao
  • Patent number: 9483490
    Abstract: A software application designed to operate within an enterprise system is modified to operate properly within a system of a third-party provider. In one embodiment, a site manager obtains pertinent information about the software application from the source systems that make up the enterprise system and provides it to a cloud manager, and the cloud manager uses the information to generate a modified version of the software application for use on the cloud provider. The modification may include operations such as driver injection, file system mounting customization, customization of hostname-to-network address mappings, and boot image creation.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: November 1, 2016
    Assignee: CLOUDVELOX, INC.
    Inventors: Anand Iyengar, Rajeev Chawla, Raman Chawla, Chung-Shang Shao, Panagiotis Tsirigotis
  • Publication number: 20140330781
    Abstract: A system and method for parallel file system traversal using multiple job executors is disclosed. The system includes a pool of job executors, a job queue, and a trigger tracker. An object, representative of a node in the filesystem, is added (i.e., pushed) to the job queue for processing by an job executor. The job queue assigns (i.e., pops) objects to job executors in accordance to a LIFO (Last In First Out) ordering. Then the job executor performs an action such as copy. In one embodiment, the trigger tracker follows the processing of a child nodes to a particular child node. Thus, the filesystem is being traversed by several job executors at the same time.
    Type: Application
    Filed: July 20, 2014
    Publication date: November 6, 2014
    Inventors: Chi Ming Wong, Anand Iyengar, Panagiotis Tsirigotis, Thomas K. Wong, Tadd Ottman, Gaurav Gupta, Lalitha Krishnan, Richard A. Simpkins
  • Patent number: 8832697
    Abstract: A system and method for parallel file system traversal using multiple job executors is disclosed. The system includes a pool of job executors, a job queue, and a trigger tracker. An object, representative of a node in the filesystem, is added (i.e., pushed) to the job queue for processing by an job executor. The job queue assigns (i.e., pops) objects to job executors in accordance to a LIFO (Last In First Out) ordering. Then the job executor performs an action such as copy. In one embodiment, the trigger tracker follows the processing of a child nodes to a particular child node. Thus, the filesystem is being traversed by several job executors at the same time.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: September 9, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Chi Ming Wong, Anand Iyengar, Panagiotis Tsirigotis, Thomas K. Wong, Tadd Ottman, Gaurav Gupta, Lalitha Krishnan, Richard A. Simpkins
  • Patent number: 8539081
    Abstract: A NAS (Network Attaches Storage) switch authenticates a client on multiple file servers for proxy services. The NAS switch enables proxy services by successively authenticating the client on the file servers using referrals. The NAS switch further comprises a connection manager to establish connections to the client and the file servers, a referral manager to redirect the client for successive authentications, and a transaction manager to perform data transfers with the file servers on behalf of the client. The system components support DFS (Distributed File System), and communicate using a protocol dialect that supports referral mechanisms such as NFSv4 (Network File Server version 4) or CIFS (Common Internet File System). The transaction manager also performs a protocol dialect translation service when the connection manager negotiates one protocol dialect with the client, and a different protocol dialect with the file server.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: September 17, 2013
    Assignee: Neopath Networks, Inc.
    Inventors: Anand Iyengar, Thomas K. Wong, Panagiotis Tsirigotis, Rajeev Chawla, Zuwei Liu, Matthew Seitz, Richard A. Simpkins
  • Patent number: 8195627
    Abstract: The present invention provides selective migration in a storage network in accordance with a policy. The policy can include rules that establish which objects are migrated from a source file server to a destination file server based on file attributes (e.g., file type, file size, last access time, frequency of access). For example, large multimedia files that consume I/O bandwidth on expensive or critical file servers, without adding much value to enterprise productivity, can be migrated to a commodity or less critical file server.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: June 5, 2012
    Assignee: Neopath Networks, Inc.
    Inventors: Chi Ming Wong, Thomas K. Wong, Panagiotis Tsirigotis, Anand Iyengar, Rajeev Chawla, Yu Cheong Chan, Zuwei Liu, Matthew Seitz, Richard A. Simpkins, Geetha Srikantan, Gaurav Gupta
  • Patent number: 8190741
    Abstract: Systems and methods to customize a namespace using a synthetic namespace. A NAS switch provides file migrations in a NAS storage network that are transparent to the clients. The NAS switch file handles are used to customize a namespace. More specifically, a synthetic namespace is generated from one or more file location tables that map the switch file handles to NAS file handles. The NAS file handles are independent of a physical export containing the objects referred to by the NAS file handles. In one example, the synthetic namespace presents a home directory corresponding to a location of a user.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: May 29, 2012
    Assignee: Neopath Networks, Inc.
    Inventors: Thomas K. Wong, Anand Iyengar, Panagiotis Tsirigotis, Chi Ming Wong, Yu Cheong Chan, Richard A. Simpkins
  • Patent number: 8180843
    Abstract: A NAS switch provides file migrations in a NAS storage network that are transparent to the clients. A source file server exports an original NAS file handles indicative of object locations on the source file server to the NAS switch. The NAS switch modifies the original NAS file handles to an internal file system and maps the original NAS file handles to a switch file handles independent of location. The NAS switch exports the switch file handles to a client. The client looks-up objects and makes NAS requests to the source file server using switch file handles. The NAS switch performs file migration by first replicating the namespace containing data to be migrated from source file server to a destination file server. Separately, the NAS replicates data which is a relatively longer process than the namespace replication. During data replication, namespace access requests for objects are directed to the replicated namespace.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: May 15, 2012
    Assignee: Neopath Networks, Inc.
    Inventors: Thomas K. Wong, Panagiotis Tsirigotis, Anand Iyengar, Rajeev Chawla
  • Patent number: 8131689
    Abstract: A system and method for performing policy-based storage management using data related to access frequency and file attribute accumulation. A switch device provides transparency for transactions between a client and a storage network. The transparency allows objects (e.g., files or directories) to be moved (e.g., migrated) on the storage network without affecting a reference to the object used by the client (e.g., a file handle). A monitoring module generates accumulation data associated with the transactions for use in policy-based management. The accumulation data can describe uses of the file such as how often certain files are accessed, modifications to files such as creations of new directories or files, and other uses.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: March 6, 2012
    Inventors: Panagiotis Tsirigotis, Geetha Srikantan, Thomas K. Wong, Chi Ming Wong, Anand Iyengar, Rajeev Chawla, Richard Simpkins, Zuwei Liu, Gaurav Gupta, Matthew Seitz, Yu Cheong Chan
  • Patent number: 7831641
    Abstract: A NAS switch provides large file support to a file server in a decentralized storage network such as a NAS (Network Attached Storage) storage network. For example, files greater than 2-GB can be stored on a 32-bit commodity file server. The NAS switch sits in the data path of a client on the front end and a commodity NAS file server on the back end. A segmentation module in the NAS switch stores large files as separate data chunks in the file server. To do so, the segmentation module stores a directory file handle, which points to a directory containing the data chunks, in place of the large file. The segmentation module can also store a large file/chunk directory association in a migration cache. A reconstruction module processes client requests concerning large files by issuing requests to specific data chunks. For example, in a read operation, the reconstruction module calculates chunk numbers to determine which file to read and offsets to determine which byte to read within a chunk.
    Type: Grant
    Filed: April 26, 2004
    Date of Patent: November 9, 2010
    Assignee: Neopath Networks, Inc.
    Inventors: Thomas K. Wong, Panagiotis Tsirigotis, Anand Iyengar, Rajeev Chawla
  • Patent number: 7757278
    Abstract: A method and apparatus are provided for protecting sensitive information within server or other computing environments. Numerous electronic requests addressed to a server system are received over network couplings and evaluated. The evaluation scans for sensitive information including credit card information and private user information. Upon detecting sensitive data, cryptographic operations are applied to the sensitive data. When the sensitive data is being transferred to the server system, the cryptographic operations encrypt the sensitive data prior to transfer among components of the server system. When sensitive data is being transferred from the server system, the cryptographic operations decrypt the sensitive data prior to transfer among the network couplings. The cryptographic operations also include hash, and keyed hash operations.
    Type: Grant
    Filed: January 2, 2002
    Date of Patent: July 13, 2010
    Assignee: SafeNet, Inc.
    Inventors: Dan Boneh, Rajeev Chawla, Alan Frindell, Eu-Jin Goh, Nagendra Modadugu, Panagiotis Tsirigotis
  • Patent number: 7720796
    Abstract: A NAS switch provides mirroring in a NAS storage network that is transparent to client. A source file server exports an original NAS file handles indicative of object locations on the source file server to the NAS switch. The NAS switch modifies the original NAS file handles to an internal file system and maps the original NAS file handles to a switch file handles independent of location. The NAS switch exports the switch file handles to a client. The client looks-up objects and makes NAS requests to the source file server using switch file handles. The NAS switch performs mirroring of a namespace when during processes such as data migration, data replication, and data snapshot.
    Type: Grant
    Filed: January 3, 2006
    Date of Patent: May 18, 2010
    Assignee: Neopath Networks, Inc.
    Inventors: Chi M. Wong, Thomas K. Wong, Panagiotis Tsirigotis, Richard A. Simpkins, Zuwei Liu
  • Patent number: 7587422
    Abstract: A NAS switch, in the data path of a client and a NAS file server on the storage network, provides a centralized point of reconfiguration after a network change that alleviates the need for reconfiguration of each connected client. The client uses a NAS request to access a storage object to the NAS switch using a switch file handle that is independent of object location and that can be used to locate the primary and its replica storage objects if the object is subsequently replicated. A replication module replicates a namespace separately from data contained therein. Afterwards, synchronicity module looks-up the switch file handle in a file handle replication table to determine if the object has been replicated and, if so, sends one of the replica NAS file handles. The synchronicity module also maintains synchronicity between the primary and replica file servers through critical NAS requests that modify objects such as create, delete, and the like.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: September 8, 2009
    Assignee: Neopath Networks, Inc.
    Inventors: Thomas K. Wong, Panagiotis Tsirigotis, Anand Iyengar, Rajeev Chawla
  • Publication number: 20080114854
    Abstract: A NAS switch provides file migrations in a NAS storage network that are transparent to the clients. A source file server exports an original NAS file handles indicative of object locations on the source file server to the NAS switch. The NAS switch modifies the original NAS file handles to an internal file system and maps the original NAS file handles to a switch file handles independent of location. The NAS switch exports the switch file handles to a client. The client looks-up objects and makes NAS requests to the source file server using switch file handles. The NAS switch performs file migration by first replicating the namespace containing data to be migrated from source file server to a destination file server. Separately, the NAS replicates data which is a relatively longer process than the namespace replication. During data replication, namespace access requests for objects are directed to the replicated namespace.
    Type: Application
    Filed: January 24, 2008
    Publication date: May 15, 2008
    Inventors: Thomas WONG, Panagiotis TSIRIGOTIS, Anand IYENGAR, Rajeev CHAWLA
  • Patent number: 7346664
    Abstract: A NAS switch provides file migrations in a NAS storage network that are transparent to the clients. A source file server exports an original NAS file handles indicative of object locations on the source file server to the NAS switch. The NAS switch modifies the original NAS file handles to an internal file system and maps the original NAS file handles to a switch file handles independent of location. The NAS switch exports the switch file handles to a client. The client looks-up objects and makes NAS requests to the source file server using switch file handles. The NAS switch performs file migration by first replicating the namespace containing data to be migrated from source file server to a destination file server. Separately, the NAS replicates data which is a relatively longer process than the namespace replication. During data replication, namespace access requests for objects are directed to the replicated namespace.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: March 18, 2008
    Assignee: Neopath Networks, Inc.
    Inventors: Thomas K. Wong, Panagiotis Tsirigotis, Anand Iyengar, Rajeev Chawla
  • Patent number: 7269608
    Abstract: An object cache stores objects in a cyclic buffer to provide highly efficient creation of cache entries. The cache efficiently manages storage of a large number of small objects because the cache does not write objects into a file system as individual files, rather the cache utilizes cyclical buffers in which to store objects as they are added to the cache. Because of the use of a cyclic buffer, the high-overhead process of purging cache entries never needs to be performed. Cache entries are automatically purged as they are overwritten when the cyclic buffer becomes full and the input pointer wraps around from the end of a cyclic buffer to the beginning of a cyclic buffer. Additionally, in the event of a system crash or disk subsystem malfunction, inspect and repair time is independent of the size of the cache, as opposed to conventional file systems in which the time is proportional to the size of the file system.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: September 11, 2007
    Assignee: Sun Microsystems, Inc.
    Inventors: Thomas K. Wong, Panagiotis Tsirigotis, Sanjay R. Radia, Rajeev Chawla, Omid Ahmadian
  • Publication number: 20070136308
    Abstract: A system and method for performing policy-based storage management using data related to access frequency and file attribute accumulation. A switch device provides transparency for transactions between a client and a storage network. The transparency allows objects (e.g., files or directories) to be moved (e.g., migrated) on the storage network without affecting a reference to the object used by the client (e.g., a file handle). A monitoring module generates accumulation data associated with the transactions for use in policy-based management. The accumulation data can describe uses of the file such as how often certain files are accessed, modifications to files such as creations of new directories or files, and other uses.
    Type: Application
    Filed: October 2, 2006
    Publication date: June 14, 2007
    Inventors: Panagiotis Tsirigotis, Geetha Srikantan, Thomas Wong, Chi Wong, Anand Iyengar, Rajeev Chawla, Richard Simpkins, Zuwei Liu, Gaurav Gupta, Matthew Seitz, Yu Chan
  • Publication number: 20070024919
    Abstract: A system and method for parallel file system traversal using multiple job executors is disclosed. The system includes a pool of job executors, a job queue, and a trigger tracker. An object, representative of a node in the filesystem, is added (i.e., pushed) to the job queue for processing by an job executor. The job queue assigns (i.e., pops) objects to job executors in accordance to a LIFO (Last In First Out) ordering. Then the job executor performs an action such as copy. In one embodiment, the trigger tracker follows the processing of a child nodes to a particular child node. Thus, the filesystem is being traversed by several job executors at the same time.
    Type: Application
    Filed: June 29, 2006
    Publication date: February 1, 2007
    Inventors: Chi Wong, Anand Iyengar, Panagiotis Tsirigotis, Thomas Wong, Tadd Ottman, Gaurav Gupta, Lalitha Krishnan, Richard Simpkins
  • Publication number: 20060271598
    Abstract: Systems and methods to customize a namespace using a synthetic namespace. A NAS switch provides file migrations in a NAS storage network that are transparent to the clients. The NAS switch file handles are used to customize a namespace. More specifically, a synthetic namespace is generated from one or more file location tables that map the switch file handles to NAS file handles. The NAS file handles are independent of a physical export containing the objects referred to by the NAS file handles. In one example, the synthetic namespace presents a home directory corresponding to a location of a user.
    Type: Application
    Filed: March 31, 2006
    Publication date: November 30, 2006
    Inventors: Thomas Wong, Anand Iyengar, Panagiotis Tsirigotis, Chi Wong, Yu Chan, Richard Simpkins
  • Patent number: 7137143
    Abstract: A method and system for securing network communications are provided. In a network a Secure Reverse Proxy (“SRP”) is placed among a server and a client where the client and SRP establish a secure connection using TLS protocol. Upon receiving a request from the client for a secure HTTP page, the SRP determines if the secure page is maintained in its cache. If the page is present, the SRP responds to the client by sending the requested secure HTTP page without contacting the server. If the page is not contained within the SRP's cache, the SRP establishes secure TLS connection with the server and forwards the request for the HTTP page. Receiving the HTTP page from the server, the SRP places it in its cache for future use. Having the page in its cache the SRP retrieves the page, encrypts it, and sends it to the requesting client. Subsequent requests for the same page do not involve the server enhancing the efficiency of network operations.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: November 14, 2006
    Assignee: Ingrian Systems Inc.
    Inventors: Rajeev Chawla, Panagiotis Tsirigotis, Dan Boneh