JP4515319B2 - コンピュータシステム - Google Patents
コンピュータシステム Download PDFInfo
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- JP4515319B2 JP4515319B2 JP2005129182A JP2005129182A JP4515319B2 JP 4515319 B2 JP4515319 B2 JP 4515319B2 JP 2005129182 A JP2005129182 A JP 2005129182A JP 2005129182 A JP2005129182 A JP 2005129182A JP 4515319 B2 JP4515319 B2 JP 4515319B2
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- 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
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- 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
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- 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
- H04L67/1023—Server selection for load balancing based on a hash applied to IP addresses or costs
-
- 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
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
- H04L67/63—Routing a service request depending on the request content or context
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- 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
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer And Data Communications (AREA)
- Information Transfer Between Computers (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Description
IETF,RFC793 ,"Transmission Control Protocol",1981年9月 IETF,RFC2616,"Hypertext Transfer Protocol -- HTTP/1.1",1999年6月 Z. Genova and K. Christensen," Using signatures to improve URL routing.",In proceedings of IEEE International Performance, Computing, and Cmmunications Conference,2002年4月,p.45−52
図1は、第1の実施の形態のコンピュータシステムの構成を示すブロック図である。
次に、本発明を、分散キャッシュを備えるコンピュータシステムに適用した例を説明する。
第1及び第2の実施の形態では、サーバとクライアント端末間のセッションを確立した後に交換されるパケットにハッシュ値を埋め込んだ。以下に説明する第3の実施の形態では、TCPセッション確立時にハッシュ値を埋め込んだパケットを使用する。
102 ネットワーク
103 プロキシ
104 Webサーバ
105 URLスイッチ
1001 キャッシュサーバ
1002 Webクライアント端末
1003、1006、1007 ネットワーク
1004 URLスイッチ
1005 オリジンサーバ
Claims (10)
- 複数のサーバとパケット転送装置を備えるコンピュータシステムにおいて、
前記各サーバは前記パケット転送装置と接続され、
前記パケット転送装置は、ネットワークを介してクライアント端末と接続され、
前記パケット転送装置は、前記クライアント端末から要求されたコンテンツの可変長の識別子から計算された固定長のハッシュ値を含むコンテンツ要求を受信し、前記受信したコンテンツ要求に含まれるハッシュ値を抽出し、前記抽出したハッシュ値に基づいて前記コンテンツ要求の転送先を前記複数のサーバのうちいずれのサーバにするかを決定することを特徴とするコンピュータシステム。 - 前記クライアント端末は、要求に係るコンテンツの可変長の識別子から固定長のハッシ ュ値を計算し、前記計算されたハッシュ値をコンテンツ要求に格納し、前記コンテン要 求をパケット転送装置に送信することを特徴とする請求項1に記載のコンピュータシステム。
- 前記クライアント端末からのコンテンツ要求を受信するプロキシサーバを備え、
前記プロキシサーバは、前記パケット転送装置及び前記クライアント端末と接続され、
前記クライアント端末は、要求に係るコンテンツの可変長の識別子を含むコンテンツ要求を前記プロキシサーバに送信し、
前記プロキシサーバは、受信したコンテンツ要求から、要求に係るコンテンツの可変長の識別子を抽出し、前記抽出された識別子から固定長のハッシュ値を計算し、前記計算されたハッシュ値をコンテンツ要求に格納し、前記コンテンツ要求をパケット転送装置に送信することを特徴とする請求項1に記載のコンピュータシステム。 - 前記プロキシサーバは、
前記クライアント端末からコンテンツ要求を受信するインターフェース部と、
当該要求に係るコンテンツの可変長の識別子から固定長のハッシュ値を計算し、
前記計算されたハッシュ値をコンテンツ要求に格納するプロセッサと、を備えることを特徴とする請求項3に記載のコンピュータシステム。 - 前記クライアント端末は、
要求に係るコンテンツの可変長の識別子から固定長のハッシュ値を計算し、
前記計算されたハッシュ値を要求パケット内に書き込むプロセッサと、を備えることを特徴とする請求項1に記載のコンピュータシステム。 - 前記パケット転送装置は、
前記コンテンツ要求に含まれる固定長のハッシュ値を抽出するプロセッサと、
前記コンテンツの可変長の識別子に対応するハッシュ値と前記コンテンツ要求の転送先との対応を含む転送先選択情報を記憶した記憶部と、を備えることを特徴とする請求項1に記載のコンピュータシステム。 - 前記プロセッサは、
前記抽出されたハッシュ値及び前記転送先選択情報によって、前記コンテンツ要求の転送先を決定し、
前記決定された転送先にパケットを転送することを特徴とする請求項6に記載のコンピ ュータシステム。 - 前記パケット転送装置は、
前記コンテンツ要求に代えて、前記クライアント端末から要求されたコンテンツの可変長の識別子から計算された固定長のハッシュ値を含むセッション確立要求を受信し、
前記受信したセッション確立要求に含まれるハッシュ値を抽出し、前記抽出したハッシ ュ値に基づいて前記セッション確立要求の転送先を前記複数のサーバのうちいずれのサーバにするかを決定することを特徴とする請求項1に記載のコンピュータシステム。 - パケット転送装置、オリジンサーバ、キャッシュサーバ及び制御サーバを含んだコンピュータシステムであって、
前記オリジンサーバは、クライアント端末にコンテンツを提供し、
前記キャッシュサーバは、前記オリジンサーバから提供されたコンテンツを記憶し、
前記制御サーバは、前記キャッシュサーバに記憶されたコンテンツを管理し、
前記パケット転送装置は、前記クライアント端末から要求されたコンテンツの可変長の識別子から計算された固定長のハッシュ値を含むコンテンツ要求を受信し、前記受信したコンテンツ要求に含まれるハッシュ値に基づいて、当該コンテンツ要求を、前記オリジンサーバ又は前記制御サーバへ振分けることを特徴とするコンピュータシステム。 - 前記制御サーバは、前記キャッシュサーバが記憶したコンテンツの情報を記憶するキャッシュ所在情報を備えることを特徴とする請求項9に記載のコンピュータシステム。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005129182A JP4515319B2 (ja) | 2005-04-27 | 2005-04-27 | コンピュータシステム |
US11/411,071 US7653703B2 (en) | 2005-04-27 | 2006-04-26 | Computer system with a packet transfer device using a hash value for transferring a content request |
CN200610077713.3A CN1855825A (zh) | 2005-04-27 | 2006-04-26 | 计算机*** |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005129182A JP4515319B2 (ja) | 2005-04-27 | 2005-04-27 | コンピュータシステム |
Publications (3)
Publication Number | Publication Date |
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JP2006309383A JP2006309383A (ja) | 2006-11-09 |
JP2006309383A5 JP2006309383A5 (ja) | 2008-04-17 |
JP4515319B2 true JP4515319B2 (ja) | 2010-07-28 |
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JP2005129182A Expired - Fee Related JP4515319B2 (ja) | 2005-04-27 | 2005-04-27 | コンピュータシステム |
Country Status (3)
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US (1) | US7653703B2 (ja) |
JP (1) | JP4515319B2 (ja) |
CN (1) | CN1855825A (ja) |
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