Patent application number | Description | Published |
20100049718 | Transactional Processing for Clustered File Systems - Systems and methods for transactional processing within a clustered file system wherein user defined transactions operate on data segments of the file system data. The users are provided within an interface for using a transactional mechanism, namely services for opening, writing and rolling-back transactions. A distributed shared memory technology is utilized to facilitate efficient and coherent cache management within the clustered file system based on the granularity of data segments (rather than files). | 02-25-2010 |
20100049921 | Distributed Shared Caching for Clustered File Systems - Systems and methods for distributed shared caching in a clustered file system, wherein coordination between the distributed caches, their coherency and concurrency management, are all done based on the granularity of data segments rather than files. As a consequence, this new caching system and method provides enhanced performance in an environment of intensive access patterns to shared files. | 02-25-2010 |
20100049922 | DISTRIBUTED SHARED MEMORY - Systems and methods for implementing a distributed shared memory (DSM) in a computer cluster in which an unreliable underlying message passing technology is used, such that the DSM efficiently maintains coherency and reliability. DSM agents residing on different nodes of the cluster process access permission requests of local and remote users on specified data segments via handling procedures, which provide for recovering of lost ownership of a data segment while ensuring exclusive ownership of a data segment among the DSM agents detecting and resolving a no-owner messaging deadlock, pruning of obsolete messages, and recovery of the latest contents of a data segment whose ownership has been lost. | 02-25-2010 |
20120265940 | TRANSACTIONAL PROCESSING FOR CLUSTERED FILE SYSTEMS - Systems and methods for transactional processing within a clustered file system wherein user defined transactions operate on data segments of the file system data. The users are provided within an interface for using a transactional mechanism, namely services for opening, writing and rolling-back transactions. A distributed shared memory technology is utilized to facilitate efficient and coherent cache management within the clustered file system based on the granularity of data segments (rather than files). | 10-18-2012 |
20120271886 | DISTRIBUTED SHARED MEMORY - Systems and methods for implementing a distributed shared memory (DSM) in a computer cluster in which an unreliable underlying message passing technology is used, such that the DSM efficiently maintains coherency and reliability. DSM agents residing on different nodes of the cluster process access permission requests of local and remote users on specified data segments via handling procedures, which provide for recovering of lost ownership of a data segment while ensuring exclusive ownership of a data segment among the DSM agents detecting and resolving a no-owner messaging deadlock, pruning of obsolete messages, and recovery of the latest contents of a data segment whose ownership has been lost. | 10-25-2012 |
20120271887 | DISTRIBUTED SHARED MEMORY - Systems and methods for implementing a distributed shared memory (DSM) in a computer cluster in which an unreliable underlying message passing technology is used, such that the DSM efficiently maintains coherency and reliability. DSM agents residing on different nodes of the cluster process access permission requests of local and remote users on specified data segments via handling procedures, which provide for recovering of lost ownership of a data segment while ensuring exclusive ownership of a data segment among the DSM agents detecting and resolving a no-owner messaging deadlock, pruning of obsolete messages, and recovery of the latest contents of a data segment whose ownership has been lost. | 10-25-2012 |
20120272012 | DISTRIBUTED SHARED MEMORY - Systems and methods for implementing a distributed shared memory (DSM) in a computer cluster in which an unreliable underlying message passing technology is used, such that the DSM efficiently maintains coherency and reliability. DSM agents residing on different nodes of the cluster process access permission requests of local and remote users on specified data segments via handling procedures, which provide for recovering of lost ownership of a data segment while ensuring exclusive ownership of a data segment among the DSM agents detecting and resolving a no-owner messaging deadlock, pruning of obsolete messages, and recovery of the latest contents of a data segment whose ownership has been lost. | 10-25-2012 |
20120272014 | DISTRIBUTED SHARED MEMORY - Systems and methods for implementing a distributed shared memory (DSM) in a computer cluster in which an unreliable underlying message passing technology is used, such that the DSM efficiently maintains coherency and reliability. DSM agents residing on different nodes of the cluster process access permission requests of local and remote users on specified data segments via handling procedures, which provide for recovering of lost ownership of a data segment while ensuring exclusive ownership of a data segment among the DSM agents detecting and resolving a no-owner messaging deadlock, pruning of obsolete messages, and recovery of the latest contents of a data segment whose ownership has been lost. | 10-25-2012 |
20120278392 | DISTRIBUTED SHARED MEMORY - Systems and methods for implementing a distributed shared memory (DSM) in a computer cluster in which an unreliable underlying message passing technology is used, such that the DSM efficiently maintains coherency and reliability. DSM agents residing on different nodes of the cluster process access permission requests of local and remote users on specified data segments via handling procedures, which provide for recovering of lost ownership of a data segment while ensuring exclusive ownership of a data segment among the DSM agents detecting and resolving a no-owner messaging deadlock, pruning of obsolete messages, and recovery of the latest contents of a data segment whose ownership has been lost. | 11-01-2012 |
20120296945 | IMPLEMENTING TRANSACTIONAL PROCESSING FOR USER OPERATIONS IN CLUSTERED FILE SYSTEMS - Systems. Methods, and Computer Program Products are provided for implementing transactional processing for user operations in a clustered file system (CFS). Transactional functionality is provided for user defined operations for one of writing and modifying files, and user defined write operations and individual user defined modification operations to various possible alternative files are wrapped into either a single transaction or multiple transactions individual. | 11-22-2012 |
20120297141 | IMPLEMENTING TRANSACTIONAL MECHANISMS ON DATA SEGMENTS USING DISTRIBUTED SHARED MEMORY - Systems, Methods, and Computer Program Products are provided for implementing transactional mechanisms by a plurality of procedures on data segments by using distributed shared memory (DSM) agents in a clustered file system (CFS). A new data segment is allocated and an associated cache data segment and metadata data segments, which are allocated for the new data segment and loaded into a cache and modified during the allocating of the new data segment, are added to a list of data segments modified within an associated transaction. The DSM agents assign an exclusive permission to the new data segment. | 11-22-2012 |
20120297247 | RECOVERING TRANSACTIONS OF FAILED NODES IN A CLUSTERED FILE SYSTEM - Systems. Methods, and Computer Program Products are provided for recovering transactions of failed nodes using a recovery procedure in a clustered file system (CFS). A data segment is determined that the data segment should be copied to a final storage location by validating that an ownership of the data segment is not associated with any other operational node, via a distributed shared memory (DSM) agent. The ownership of the data segment is set to a local DSM agent. | 11-22-2012 |
20120303579 | CONCURRENT CHECKPOINTING AND MODIFICATIONS IN A TRANSACTIONAL CLUSTERED FILE SYSTEM - Systems, Methods, and Computer Program Products are provided for concurrent checkpointing and modifications in a transactional clustered file system (CFS). Shadow data segments, whose contents are identical to an original data segment currently being written by a checkpoint operation, for users that require access for modification to data segments concurrently being written within a checkpoint operation. | 11-29-2012 |
20120303592 | RESTORING DATA SEGMENTS OF ROLLED-BACK TRANSACTIONS IN A CLUSTERED FILE SYSTEM - Systems, Methods, and Computer Program Products are provided for restoring data segments in a clustered file system (CFS). Contents of the data segments, that were modified during a transaction, which is being rolled-back to the most recent contents of the data segments prior to the transaction commencing, are restored. Locations of the most recent contents of the data segments, which are restored, are identified. | 11-29-2012 |
20120303682 | CONCURRENT PROCESSING OF TRANSACTIONS AND READ OPERATIONS ACHIEVING SERIALIZATION AND ISOLATION IN CLUSTERED FILE SYSTEMS - Systems. Methods, and Computer Program Products are provided for concurrent processing of transactions and read operations for achieving serialization and isolation in a clustered file system (CFS). Users, performing read only operations, are allowed to currently access the CFS while mutually excluding and serializing transactions of users affecting a same portion of the CFS. Transactions are ordered across a cluster of nodes of the CFS according to the transactions termination time | 11-29-2012 |
20120303683 | CONCURRENT TRANSACTIONAL CHECKPOINTS IN A CLUSTERED FILE SYSTEM - Systems, Methods, and Computer Program Products are provided for performing concurrent checkpoints from file system agents residing on different nodes within in a clustered file system (CFS). Responsibility to checkpoint a modified and a committed data segment to a final storage location is assigned to one of the file system agents. One of the file system agents, which is assigned, is the file system agent whose associated distributed shared memory (DSM) agent is an owner of the data segment. | 11-29-2012 |
20130185342 | MANAGING GLOBAL CACHE COHERENCY AND ACCESS PERMISSIONS - Systems. Methods, and Computer Program Products are provided managing a global cache coherency and reducing messaging traffic for coordination of access permissions in a distributed shared caching for a clustered file systems (CFS). The CFS manages access permissions to an entire space of the data segments by using the DSM module. In response to processing a request message from a remote DSM module to access one of the data segments, including in a response message permission to access the one of the data segments, and deciding if one of a transfer of ownership, and most recent contents of the one of the data segments should be included in the response message for the permission to access the one of the data segments. The last two components of the response message depend upon availability of the one of the data segments that is requested in a local external cache. | 07-18-2013 |
20130185519 | MANAGING GLOBAL CACHE COHERENCY IN A DISTRIBUTED SHARED CACHING FOR CLUSTERED FILE SYSTEMS - Systems. Methods, and Computer Program Products are provided for managing a global cache coherency in a distributed shared caching for a clustered file systems (CFS). The CFS manages access permissions to an entire space of data segments by using the DSM module. In response to receiving a request to access one of the data segments, a calculation operation is performed for obtaining most recent contents of one of the data segments. The calculation operation performs one of providing the most recent contents via communication with a remote DSM module which obtains the one of the data segments from an associated external cache memory, instructing by the DSM module to read from storage the one of the data segments, and determining that any existing contents of the one of the data segments in the local external cache are the most recent contents. | 07-18-2013 |
20130191330 | REDUCING CONTENTION AND MESSAGING TRAFFIC IN A DISTRIBUTED SHARED CACHING FOR CLUSTERED FILE SYSTEMS - Systems. Methods, and Computer Program Products are provided managing global cache coherency and reducing contention and messaging traffic in a distributed shared caching for a clustered file systems (CFS). The CFS manages access to data segment space of the data segments shared between a cluster of nodes by using the file access component. A CFS disk space is partitioned into regions and disk objects are partitioned into groups. Each of the regions and the groups are assigned to a CFS agent residing on each one of the cluster of nodes. | 07-25-2013 |
20140181162 | MANAGING GLOBAL CACHE COHERENCY IN A DISTRIBUTED SHARED CACHING FOR CLUSTERED FILE SYSTEMS - Systems. Methods, and Computer Program Products are provided for managing a global cache coherency in a distributed shared caching for a clustered file systems (CFS). The CFS manages access permissions to an entire space of data segments by using the DSM module. In response to receiving a request to access one of the data segments, a calculation operation is performed for obtaining most recent contents of one of the data segments. The calculation operation performs one of providing the most recent contents via communication with a remote DSM module which obtains the one of the data segments from an associated external cache memory, instructing by the DSM module to read from storage the one of the data segments, and determining that any existing contents of the one of the data segments in the local external cache are the most recent contents. | 06-26-2014 |
20140181408 | MANAGING GLOBAL CACHE COHERENCY IN A DISTRIBUTED SHARED CACHING FOR CLUSTERED FILE SYSTEMS - Systems. Methods, and Computer Program Products are provided for managing a global cache coherency in a distributed shared caching for a clustered file systems (CFS). The CFS manages access permissions to an entire space of data segments by using the DSM module. In response to receiving a request to access one of the data segments, a calculation operation is performed for obtaining most recent contents of one of the data segments. The calculation operation performs one of providing the most recent contents via communication with a remote DSM module which obtains the one of the data segments from an associated external cache memory, instructing by the DSM module to read from storage the one of the data segments, and determining that any existing contents of the one of the data segments in the local external cache are the most recent contents. | 06-26-2014 |
20140181418 | MANAGING GLOBAL CACHE COHERENCY IN A DISTRIBUTED SHARED CACHING FOR CLUSTERED FILE SYSTEMS - Systems. Methods, and Computer Program Products are provided for managing a global cache coherency in a distributed shared caching for a clustered file systems (CFS). The CFS manages access permissions to an entire space of data segments by using the DSM module. In response to receiving a request to access one of the data segments, a calculation operation is performed for obtaining most recent contents of one of the data segments. The calculation operation performs one of providing the most recent contents via communication with a remote DSM module which obtains the one of the data segments from an associated external cache memory, instructing by the DSM module to read from storage the one of the data segments, and determining that any existing contents of the one of the data segments in the local external cache are the most recent contents. | 06-26-2014 |
20140236998 | MANAGING GLOBAL CACHE COHERENCY IN A DISTRIBUTED SHARED CACHING FOR CLUSTERED FILE SYSTEMS - Various embodiments are provided for managing a global cache coherency in a distributed shared caching for a clustered file system (CFS). The CFS manages access permissions to an entire space of data segments by using the DSM module. In response to receiving a request to access one of the data segments, a calculation operation is performed for obtaining most recent contents of one of the data segments. The calculation operation performs one of providing the most recent contents via communication with a remote DSM module which obtains the one of the data segments from an associated external cache memory, instructing by the DSM module to read from storage the one of the data segments, and determining that any existing contents of the one of the data segments in the local external cache are the most recent contents. | 08-21-2014 |
20140325158 | MANAGING GLOBAL CACHE COHERENCY IN A DISTRIBUTED SHARED CACHING FOR CLUSTERED FILE SYSTEMS - Systems. Methods, and Computer Program Products are provided for managing a global cache coherency in a distributed shared caching for a clustered file systems (CFS). The CFS manages access permissions to an entire space of data segments by using the DSM module. In response to receiving a request to access one of the data segments, a calculation operation is performed for obtaining most recent contents of one of the data segments. The calculation operation performs one of providing the most recent contents via communication with a remote DSM module which obtains the one of the data segments from an associated external cache memory, instructing by the DSM module to read from storage the one of the data segments, and determining that any existing contents of the one of the data segments in the local external cache are the most recent contents. | 10-30-2014 |