CA2343802A1 - Load balancing cooperating cache servers - Google Patents

Load balancing cooperating cache servers Download PDF

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Publication number
CA2343802A1
CA2343802A1 CA002343802A CA2343802A CA2343802A1 CA 2343802 A1 CA2343802 A1 CA 2343802A1 CA 002343802 A CA002343802 A CA 002343802A CA 2343802 A CA2343802 A CA 2343802A CA 2343802 A1 CA2343802 A1 CA 2343802A1
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CA
Canada
Prior art keywords
cache servers
load balancing
cooperating
forwarded
cooperating cache
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Legal status (The legal status 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 status listed.)
Granted
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CA002343802A
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French (fr)
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CA2343802C (en
Inventor
Kevin Michael Jordan
Kun-Lung Wu
Philip Shi-Lung Yu
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International Business Machines Corp
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Individual
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Publication of CA2343802A1 publication Critical patent/CA2343802A1/en
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Publication of CA2343802C publication Critical patent/CA2343802C/en
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Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
    • G06F9/5005—Allocation of resources, e.g. of the central processing unit [CPU] to service a request
    • G06F9/5027—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals
    • G06F9/505—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals considering the load

Abstract

In a system including a collection of cooperating cache servers, such as proxy cache servers, a request can be forwarded to a cooperating cache server if the requested object cannot be found locally. An overload condition is detected if for example, due to reference skew, some objects are in high demand by all the clients and the cache servers that contain those hot objects become overloaded due to forwarded requests. In response, the load is balanced by shifting some or all of the forwarded requests from an overloaded cache server to a less loaded one. Both centralized and distributed load balancing environments are described.
CA002343802A 1998-10-09 1999-10-08 Load balancing cooperating cache servers Expired - Lifetime CA2343802C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/169,223 1998-10-09
US09/169,223 US6438652B1 (en) 1998-10-09 1998-10-09 Load balancing cooperating cache servers by shifting forwarded request
PCT/GB1999/003360 WO2000022526A1 (en) 1998-10-09 1999-10-08 Load balancing cooperating cache servers

Publications (2)

Publication Number Publication Date
CA2343802A1 true CA2343802A1 (en) 2000-04-20
CA2343802C CA2343802C (en) 2004-04-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA002343802A Expired - Lifetime CA2343802C (en) 1998-10-09 1999-10-08 Load balancing cooperating cache servers

Country Status (13)

Country Link
US (1) US6438652B1 (en)
EP (1) EP1119808A1 (en)
JP (2) JP3989682B2 (en)
KR (1) KR100473671B1 (en)
CN (1) CN1255728C (en)
AU (1) AU6114499A (en)
CA (1) CA2343802C (en)
CZ (1) CZ20011281A3 (en)
HU (1) HU224787B1 (en)
IL (1) IL141973A (en)
PL (1) PL195958B1 (en)
TW (1) TW444458B (en)
WO (1) WO2000022526A1 (en)

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