WO1999009704B1 - Method and apparatus for representing and applying network topological data - Google Patents

Method and apparatus for representing and applying network topological data

Info

Publication number
WO1999009704B1
WO1999009704B1 PCT/US1998/016798 US9816798W WO9909704B1 WO 1999009704 B1 WO1999009704 B1 WO 1999009704B1 US 9816798 W US9816798 W US 9816798W WO 9909704 B1 WO9909704 B1 WO 9909704B1
Authority
WO
WIPO (PCT)
Prior art keywords
resources
network
sites
site
directory
Prior art date
Application number
PCT/US1998/016798
Other languages
French (fr)
Other versions
WO1999009704A2 (en
WO1999009704A3 (en
Inventor
Keith W Logan
Pradyumna K Misra
Paul J Leach
Dyke Clifford P Van
Dave D Straube
Arnold S Miller
Original Assignee
Microsoft Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Microsoft Corp filed Critical Microsoft Corp
Priority to DE69829383T priority Critical patent/DE69829383T2/en
Priority to EP98940872A priority patent/EP1004193B1/en
Priority to AT98940872T priority patent/ATE291316T1/en
Priority to JP2000510248A priority patent/JP3434276B2/en
Publication of WO1999009704A2 publication Critical patent/WO1999009704A2/en
Publication of WO1999009704A3 publication Critical patent/WO1999009704A3/en
Publication of WO1999009704B1 publication Critical patent/WO1999009704B1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/45—Network directories; Name-to-address mapping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0893—Assignment of logical groups to network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004—Server selection for load balancing
    • H04L67/1008—Server selection for load balancing based on parameters of servers, e.g. available memory or workload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004—Server selection for load balancing
    • H04L67/101—Server selection for load balancing based on network conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004—Server selection for load balancing
    • H04L67/1021—Server selection for load balancing based on client or server locations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/52—Network services specially adapted for the location of the user terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/02—Standardisation; Integration
    • H04L41/0233—Object-oriented techniques, for representation of network management data, e.g. common object request broker architecture [CORBA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer And Data Communications (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Communication Control (AREA)

Abstract

A network directory and naming service include fields for identifying instances of network resources and other objects by both logical (Domain 1, Domain 2) and topological (2, 10) grouping. This combination of information facilitates automated efficient decision making with regard to replication of resources and updating the replicas in response to changes. The combination of logical and topological identification for resources also facilitates selection of a close replica in instances where a client requests access to a resource, such as a server, for which communicatively local and remote instances exist.

Claims

52AMENDED CLAIMS[received by the International Bureau on 8 March 1999 (08.03.99); original claims 1, 3, 4, 7, 10 and 17-19 amended; new claim 20 added; remaining claims unchanged (6 pages)]
1. In a network comprising a set of linked sites, a naming service comprising a list of resources and their associated sites and logical group, and replicated resources existing within multiple sites within the network registered with the naming service, a method for selecting and initiating access to the replicated resources based upon logical grouping and proximity to a requesting client comprising the steps of: receiving, by the naming service, a request to identify a replica of a resource to which the requesting client wishes to obtain access, the request identifying a site and logical group, and in response consulting a directory comprising the list of resources and associated sites; providing a response specifying at least one replica of the resource within the specified site and logical group; and attempting to access a replica specified in the response.
2. The method of claim 1 further comprising the steps of: determining that none of the replicas specified in the response meets a closeness characteristic; determining a current site within which the requesting client resides; determining that the site specified in the request did not identify the current site of the requesting client wishing to access a replica of the resource; and submitting a second request specifying the logical group and the current site of the client.
3. The method of claim 1 further comprising the steps of: determining that no replicas exist for the specified site and logical group, and in response generating a list of replicas of the resources that are associated 53
with the logical group, wherein the list includes a replica of the resource which meets a closeness characteristic but does not match the specified site.
4. The method of claim 3 wherein the replica meeting the closeness characteristic is identified from a closest sites table identifying the sites which are considered closest to the specified site.
5. The method of claim 4 wherein the resource is a network request server.
6. In a network comprising a set of linked sites, a naming service comprising a directory of resources, and replicated resources existing within multiple locations within the network, a method for configuring network directories to facilitate identification of resources by logical and topological relation to requesters of the resources comprising the steps of: registering an identification associated with an instance of a replicated resource; registering a logical group with which the instance of a replicated resource is associated; and registering a site with which the instance of a replicated resource is associated.
7. The method of claim 6 further comprising generating a list of sites for which a resource is considered closest.
8. The method of claim 6 wherein sites are further sub-divided into subnets, further comprising the step of: generating a table correlating subnets to sites.
9. The method of claim 8 wherein a subnet is specified by a partial Internet Protocol address.
10. A network facilitating identification of resources by logical and topological relation to requesters of the resources comprising: a set of locally linked computer networks; a set of remote links interconnecting the set of locally linked computer networks; replicated resources residing on the set of locally linked computer networks; client computers residing on the locally linked computer and communicatively coupled to the replicated resources; and a naming service communicatively connected to the client computers and comprising a directory of replicated resources, said directory of replicated resources comprising for instances of the replicated resources: a first field identifying a logical group with which an instance of a resource is associated and a second field identifying a site within which the resource resides.
11. The network of claim 10 wherein the replicated resources comprise directory service servers.
12. The network of claim 11 wherein instances of the directory service servers are associated with a logical group and a site, and include means for determining whether a particular instance of the directory service server meets a closeness characteristic with regard to a particular requester of access to the instance of the directory service server. 55
13. The network of claim 12 wherein the means for determining whether a particular instance of the directory service server meets a closeness characteristic includes: means for determining the locally linked computer network within which a requester presently resides; and means for detecting a match between the locally linked computer network of the requester and a set of locally linked computer networks to which the directory service server is considered closest, and in response generating a response indicating that the particular instance of the directory service server is a closest instance.
14. The network of claim 13 wherein the directory service server comprises means for generating a response message specifying the locally linked computer network within which the requester presently resides.
15. The network of claim 10 further comprising: connection type designators identifying intersite and intrasite connections; and replication facilities including a first replication mechanism for performing intrasite replication, and a second replication mechanism for performing intersite replication, and wherein the first and second replication mechanisms are selectively utilized to perform replication in accordance with values specified for replication links by the connection type designators.
16. In a network including a set of locally linked computer networks, a set of remote links interconnecting the set of locally linked computer networks, replicated resources residing on the set of locally linked computer networks, and client computers residing on the locally linked computer and communicatively coupled to the replicated resources, a naming service communicatively connected 56
to the client computers facilitating identification of resources by logical and topological relation to requesters of the resources comprising: a directory of replicated resources, said directory of resources including for instances of the replicated resources a first field identifying a logical group with which an instance of a resource is associated and a second field identifying a site within which the resource resides; and means for registering individual instances of the replicated resources within the directory of replicated resources.
17. In a network comprising a set of linked sites, replicated resources residing within multiple sites on the network, and a naming service comprising a directory of resources including directory tables facilitating identification of requested resources by logical and topological designation, a method for informing a requesting client of the existence of a closest server relationship between a server and the requesting client comprising the steps of: identifying an actual network site within which the requesting client resides; comparing the actual network site to a list of sites to which the server is considered closest; and notifying the requesting client in the event that a match is identified during the comparing step.
18. The method of claim 17 wherein the list of sites includes a set of sites which are considered closely linked to the site within which the server resides.
19. A computer readable medium having computer-executable instructions for a computer to perform, in a network comprising a set of linked sites, replicated resources residing within multiple sites on the network, and a naming service comprising a directory of resources including directory tables 57
facilitating identification of requested resources by logical and topological designation, a method for informing a requesting client of the existence of a closest server relationship between a server and the requesting client, the method including the steps of: identifying an actual network site within which the requesting client resides; comparing the actual network site to a list of sites to which the server is considered closest, wherein the list of sites includes a set of sites which are considered closely linked to the site within which the server resides; and notifying the requesting client in the event that a match is identified during the comparing step.
20. Computer readable medium having computer-executable instructions for selecting and initiating access to replicated resources, in a network comprising a set of linked sites, a naming service comprising a list of resources and their associated sites and logical group, and replicated resources existing within multiple sites within the network registered with the naming service, by performing in the network the steps of: receiving, by the naming service, a request to identify a replica of a resource to which a requesting client wishes to obtain access, the request identifying a site and logical group, and in response consulting a directory comprising the list of resources and associated sites; providing a response specifying at least one replica of the resource within the specified site and logical group; and attempting to access a replica specified in the response. 58
STATEMENT UNDER ARTICLE 19
Original claims 1, 3-4, 7, 10 and 17-19 have been amended in order to more clearly define the present invention.
New independent claim 20 has been added in order to provide coverage of electronic storage media containing programs incorporating the present invention.
No new disclosure beyond the scope of the original disclosure is added by any of the aforementioned amendments.
PCT/US1998/016798 1997-08-13 1998-08-13 Method and apparatus for representing and applying network topological data WO1999009704A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE69829383T DE69829383T2 (en) 1997-08-13 1998-08-13 METHOD AND DEVICE FOR PRESENTING AND USING NETWORK OPOLOGY DATA
EP98940872A EP1004193B1 (en) 1997-08-13 1998-08-13 Method and apparatus for representing and applying network topological data
AT98940872T ATE291316T1 (en) 1997-08-13 1998-08-13 METHOD AND DEVICE FOR REPRESENTING AND USING NETWORK TOPOLOGY DATA
JP2000510248A JP3434276B2 (en) 1997-08-13 1998-08-13 Method and apparatus for expressing and applying network topology data

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/910,412 US5968121A (en) 1997-08-13 1997-08-13 Method and apparatus for representing and applying network topological data
US08/910,412 1997-08-13

Publications (3)

Publication Number Publication Date
WO1999009704A2 WO1999009704A2 (en) 1999-02-25
WO1999009704A3 WO1999009704A3 (en) 1999-04-15
WO1999009704B1 true WO1999009704B1 (en) 1999-05-14

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PCT/US1998/016798 WO1999009704A2 (en) 1997-08-13 1998-08-13 Method and apparatus for representing and applying network topological data

Country Status (6)

Country Link
US (1) US5968121A (en)
EP (2) EP1517508B1 (en)
JP (1) JP3434276B2 (en)
AT (2) ATE291316T1 (en)
DE (2) DE69829383T2 (en)
WO (1) WO1999009704A2 (en)

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EP1517508B1 (en) 2007-11-14
DE69829383T2 (en) 2005-07-28
EP1004193A2 (en) 2000-05-31
ATE291316T1 (en) 2005-04-15
EP1517508A2 (en) 2005-03-23
JP3434276B2 (en) 2003-08-04
ATE378768T1 (en) 2007-11-15
WO1999009704A2 (en) 1999-02-25
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WO1999009704A3 (en) 1999-04-15
EP1517508A3 (en) 2005-08-03

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