US Patent No: 5,649,102

Number of patents in Portfolio can not be more than 2000

Distributed shared data management system for controlling structured shared data and for serializing access to shared data

Stats

ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

A distributed shared memory management system for a distributed shared memory computer system having a plurality of computers interconnected by a network, each computer having an independent address space and logically sharing data physically distributed to a storage of each computer. Each computer running a program for reading/changing the shared data includes a coherence control designation command for designating to enter a mutual exclusion state in which two or more computers cannot change the logically single shared data, a coherence control release command for designating a release of the mutual exclusion state, and a coherence control execution command for reflecting the contents of the shared data changed between the coherence control designation command and the coherence control release command, upon the logically single shared data in another computer. At least one of the plurality of computers includes a request message queue for storing a coherence control request message issued by the coherence control execution command when the coherence control designation command is executed. The coherence control designation command includes data for designating the order of reading/changing the shared data, and the request message queue includes a counter for storing a current state regarding the control of the order of reading/changing the shared data and a unit for storing a value regarding the control of the order of reading/changing the shared data.

Loading the Abstract Image... loading....

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
HITACHI, LTD.TOKYO32320

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Goto, Tsutomu Kokubunji, JP 18 252
Hayashi, Takehisa Sagamihara, JP 49 1278
Horimoto, Toru Atsugi, JP 9 225
Kito, Akira Ebina, JP 6 431
Murayama, Hideki Kunitachi, JP 16 229
Yamada, Kimitoshi Hadano, JP 10 390
Yamauchi, Masahiko Kokubunji, JP 7 97
Yashiro, Hiroshi Kokubunji, JP 9 157
Yoshizawa, Satoshi Saratoga, CA 34 660

Cited Art

Patent Info (Count) # Cites Year
 
HITACHI, LTD. (3)
5,129,093 Method and apparatus for executing an operation request signal in a loosely coupled parallel computer having processor elements capable of updating memory contents and minimizing exclusive control of sharable distributed memories 29 1988
5,214,759 Multiprocessors including means for communicating with each other through shared memory 21 1990
5,333,265 Replicated data processing method in distributed processing system 52 1991
 
BULL SAS (1)
5,247,629 Multiprocessor system with global data replication and two levels of address translation units 28 1990
 
HONEYWELL BULL INC. (1)
4,992,930 Synchronous cache memory system incorporating tie-breaker apparatus for maintaining cache coherency using a duplicate directory 44 1988
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
5,265,232 Coherence control by data invalidation in selected processor caches without broadcasting to processor caches not having the data 68 1991
 
SUN MICROSYSTEMS, INC. (1)
5,226,039 Packet routing switch 44 1990

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
ORACLE INTERNATIONAL CORPORATION (6)
8,365,193 Recoverable asynchronous message driven processing in a multi-node system 0 2004
7,814,067 Asynchronous actions using flashback 1 2005
7,818,386 Repeatable message streams for message queues in distributed systems 0 2005
7,779,418 Publisher flow control and bounded guaranteed delivery for message queues 0 2005
8,196,150 Event locality using queue services 0 2005
8,397,244 Publisher flow control and bounded guaranteed delivery for message queues 0 2010
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (5)
5,793,962 System for managing membership of a group of processors in a distributed computing environment 23 1996
5,787,249 Method for managing membership of a group of processors in a distributed computing environment 22 1996
5,787,250 Program product for managing membership of a group of processors in a distributed computing environment 6 1996
5,896,503 Managing membership of a domain of processors in a distributed computing environment 40 1996
8,380,787 Federation of master data management systems 0 2011
 
MOSAID TECHNOLOGIES INCORPORATED (5)
6,085,234 Remote file services network-infrastructure cache 209 1998
6,026,452 Network distributed site cache RAM claimed as up/down stream request/reply channel for storing anticipated data and meta data 127 1998
6,205,475 Request interceptor in network nodes for determining local storage of file image satisfying predetermined criteria 60 1999
6,505,241 Network intermediate node cache serving as proxy to client node to request missing data from server 113 2001
6,804,706 Network system for transmitting overwritten portion of client side node cache image to server site through intermediate downstream nodes updating cache images of data requested by client 46 2002
 
FUJITSU LIMITED (4)
5,790,398 Data transmission control method and apparatus 13 1997
5,999,968 System and method for presenting shared information to network user in specific order 40 1997
6,745,233 Data transfer technique for distributed memory type parallel computer 0 2000
7,284,001 Data file system, data access node, brain node, data access program storage medium and brain program storage medium 0 2004
 
MICROSOFT CORPORATION (4)
7,219,128 Arbitration of state changes 0 2002
7,206,810 Arbitration of state changes 0 2002
7,194,518 Methods and systems for managing state changes during an arbitration cycle when multiple computer nodes request changes of shared data 2 2002
7,167,900 Methods and systems for managing state changes during an arbitration cycle when multiple computer nodes request changes of shared data 1 2002
 
NVIDIA CORPORATION (4)
8,352,709 Direct memory access techniques that include caching segmentation data 0 2006
8,347,064 Memory access techniques in an aperture mapped memory space 0 2006
8,359,454 Memory access techniques providing for override of page table attributes 0 2006
8,347,065 System and method for concurrently managing memory access requests 0 2006
 
SAP AG (3)
7,092,973 Conflict detection in a distributed system landscape 1 2002
7,366,727 Management of inbound conflicts when merging data of distributed systems 1 2004
7,657,674 Flexible and error resistant data buffering and connectivity 0 2008
 
SUN MICROSYSTEMS, INC. (3)
6,112,282 Apparatus for atomic locking-accessing-unlocking of a shared resource 5 1997
5,900,018 Processor-implemented method of controlling data access to shared resource via exclusive access control write-cache 3 1997
6,738,846 Cooperative processing of tasks in a multi-threaded computing system 10 1999
 
TRANSOFT TECHNOLOGY CORPORATION (3)
6,076,105 Distributed resource and project management 43 1997
6,009,427 Method and apparatus for distributed control of a database 23 1997
5,999,930 Method and apparatus for distributed control of a shared storage volume 97 1997
 
GLACE APPLICATIONS NY LLC (2)
8,069,292 Apparatus and method for packet based storage virtualization 1 2007
8,386,685 Apparatus and method for packet based storage virtualization 0 2011
 
INCA TECHNOLOGY, INC. (2)
5,946,690 NDC consistency reconnect mechanism 37 1997
6,167,446 Automatically configuring network-name-services 97 1998
 
EMC CORPORATION (1)
7,073,031 Multi-processor system having data coherency 1 2003
 
GOOGLE INC. (1)
7,346,910 Administration of groups of computer programs, data processing systems, or system resources 1 2000
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
5,933,598 Method for sharing variable-grained memory of workstations by sending particular block including line and size of the block to exchange shared data structures 9 1996
 
HITACHI, LTD. (1)
7,240,167 Storage apparatus 3 2004
 
MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC. (1)
5,987,496 Real-time channel-based reflective memory 9 1996
 
NEC CORPORATION (1)
6,590,908 External signal synchronized message signaling apparatus for time division channel system 3 1999
 
PICTURETEL CORPORATION (1)
6,574,674 Method and system for managing data while sharing application programs 68 1998
 
QUALCOMM INCORPORATED (1)
8,352,682 Methods and apparatus for issuing memory barrier commands in a weakly ordered storage system 0 2009
 
SEQUENT COMPUTER SYSTEMS, INC. (1)
6,389,513 Disk block cache management for a distributed shared memory computer system 26 1998
 
SIEMENS AKTIENGESELLSCHAFT (1)
5,778,351 Method for storing system communications system data using modules and tables 0 1996
 
TELLABS COMMUNICATIONS CANADA, LTD. (1)
7,761,485 Distributed database 0 2006
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
8,407,386 Increasing functionality of a reader-writer lock 0 2011