JP4583091B2 - 接続操作を用いるネットワーク負荷分散 - Google Patents
接続操作を用いるネットワーク負荷分散 Download PDFInfo
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Description
この節では、ネットワーク負荷分散のパラダイムの一例を説明し、次の節の説明の基礎、環境、コンテキストなどを提供する。この節では、主に図1〜3を参照する。
この節では、本明細書のこの節および他の節に記載のネットワーク負荷分散実施形態によって、ネットワーク負荷分散に対する柔軟な手法がどのように提供されるかを示す。この節では、主に図4〜9Bを参照する。
この節では、ヘルスおよび/または負荷情報などのホスト状態情報を、ネットワーク負荷分散でどのように収集でき、使用できるかを説明する。この節では、主に図10〜18を参照し、ヘルスおよび負荷ハンドラ314(図3)によって提供されるヘルスおよび負荷機能を示す。図3を参照して上記で説明したように、各ホスト108は、1つまたは複数のアプリケーション316をホストする。ヘルスおよび負荷ハンドラ314は、ネットワーク負荷分散のある説明される実施形態のアプリケーション316および/またはホスト108に関連するヘルスおよび/または負荷情報を使用する。
この節では、セッション情報などのホスト状態情報がネットワーク負荷分散のためにどのように収集され、ネットワーク負荷分散においてどのように使用されるかを説明する。この節では、主に図19〜24を参照し、セッショントラッカ308(図3)によって提供されるセッションアフィニティ保存機能を示す。上記で図1〜3を参照して説明したように、各ホスト108は、クライアント102にサービスを提供する1つまたは複数のアプリケーション316をホストする。セッショントラッカ308は、ネットワーク負荷分散のある記述される実施形態のために、アプリケーション316とクライアント102の間で確立される接続のコンテキストに関するセッション情報を使用する。
この節では、トラフィックルーティング機能の高可用性に関するものを含めて、ネットワーク負荷分散についてトラフィックルーティングをどのように実施できるかを説明する。トラフィックルーティング機能には、特に転送機能に関して、分類機能および/またはリクエストルーティング機能を含めることができる。この節では、主に図25〜31を参照する。この節では、リクエストルータ306(図3)の機能、トラフィックをルーティングする時のセッションのトラッキングとヘルスおよび負荷情報の使用の間の相互関係、セッション情報ならびに/またはヘルスおよび負荷情報を用いるトラフィックルーティング相互作用に関する動作実施形態、ネットワーク負荷分散インフラストラクチャの高可用性のためのフェールオーバープロシージャ(分類コンポーネント、転送コンポーネント、および/またはリクエストルーティングコンポーネントの障害の処理を含む)、追加のネットワーク負荷分散インフラストラクチャ構成などを明らかにする。
この節では、接続移行などの接続操作をネットワーク負荷分散でどのように使用できるかを説明する。この節では、主に、図32〜39を参照し、接続マイグレータ310(図3)によって提供されるものなどの接続移行機能を明らかにする。上記で図3および4に関して説明したように、負荷分散インフラストラクチャ106での各入力接続は、そこで終端することができる。その後、接続をホスト108に移行することができ、その接続が、ホスト108で終端されるようになる。接続マイグレータ310は、この接続移行を実行することができ、接続マイグレータ310を、移行を実現するためにホスト108に部分的に配置することができる。そのような接続移行は、アプリケーションレベルの負荷分散と共に、クラシファイヤ304によっておよび/またはトンネラ312を介するトンネリングを使用して実行することができる。
図40に、本明細書に記載のネットワーク負荷分散の少なくとも1つのシステム、装置、装置、コンポーネント、構成、プロトコル、手法、方法、プロシージャ、媒体、API、これらの組合せなどを実施することができる(完全にまたは部分的に)例示的なコンピューティング(または一般装置)動作環境4000を示す。動作環境4000は、以下で説明するコンピュータおよびネットワークアーキテクチャで、または独立型の状況で使用することができる。
104 ネットワーク
106 負荷分散インフラストラクチャ
108 ホスト
201 ルータ/スイッチ
302 フォワーダ
304 クラスファイア
Claims (29)
- プロセッサ実行可能命令を含む1つまたは複数のプロセッサアクセス可能記録媒体であって、前記プロセッサ実行可能命令は、実行されたとき、送信元装置に、
フォワーダで、クライアントからの接続を受諾する動作と、
前記接続を受諾する動作の結果として前記フォワーダで前記クライアントからの接続に関するデータを受信する動作と、
前記フォワーダからクラシファイヤに前記接続に関するデータを転送する動作と、
前記クラシファイヤが、前記接続に関するデータに基づいて、前記接続を受信するためのターゲット装置を選択する動作と、
前記送信元装置の第1のプロトコルスタックのプロトコル状態と前記接続に関するデータとを集約することによって、前記接続に関する接続状態を集約する動作と、
前記接続に対応するパケットを識別するためのフロー識別子と前記接続状態とからバイナリブロブを作成する動作と、
選択されたターゲット装置の第2のプロトコルスタックに前記接続状態の注入をするために、前記バイナリブロブを前記選択されたターゲット装置に送信することによって前記クラシファイヤから前記選択されたターゲット装置へ前記接続状態を送信する動作であって、前記注入の完了後に前記接続が前記選択されたターゲット装置に移行される、動作と、
前記フォワーダによって維持されるマッピングテーブルにエントリを加える動作であって、前記エントリは、接続に関するパケットのための宛先として前記選択されたターゲット装置を示す、動作と、
前記マッピングテーブルにおける前記エントリに基づいて前記選択されたターゲット装置に前記フロー識別子に関するマッピングを送信する動作と、
前記フォワーダが、前記クライアントからの後続パケットを受信する動作と、
前記フロー識別子を使用して前記フォワーダの前記マッピングテーブルにおける前記エントリに従って前記フォワーダが前記後続パケットをカプセル化する動作であって、前記フロー識別子は、前記クライアントへの接続に関連するように、カプセル化されたパケットのフローを識別するように働く、動作と
を実行するように指示することを特徴とする1つまたは複数のプロセッサアクセス可能記録媒体。 - 受諾する前記動作は、
接続をリクエストするパケットに応答して肯定応答パケットを送信する動作
を含むことを特徴とする請求項1に記載の1つまたは複数のプロセッサアクセス可能記録媒体。 - 集約する前記動作は、
前記プロトコルスタックからプロトコル状態をコンパイルする動作
を含むことを特徴とする請求項1に記載の1つまたは複数のプロセッサアクセス可能記録媒体。 - コンパイルする前記動作は、
前記プロトコルスタックの最上位レベルから開始して、前記プロトコルスタックから前記プロトコル状態をコンパイルする動作
を含むことを特徴とする請求項3に記載の1つまたは複数のプロセッサアクセス可能記録媒体。 - コンパイルする前記動作は、
伝送制御プロトコル(TCP)スタック部分およびインターネットプロトコル(IP)スタック部分で前記プロトコルスタックから前記プロトコル状態をコンパイルする動作
を含むことを特徴とする請求項3に記載の1つまたは複数のプロセッサアクセス可能記録媒体。 - 前記接続状態を送信する動作は、
前記バイナリブロブを含む1つまたは複数のパケットが失われるか壊される場合であっても前記バイナリブロブがターゲット装置で無変更で受信されるように、信頼性のあるプロトコルを使用して、前記送信元装置から前記選択されたターゲット装置に前記バイナリブロブを送信する動作を含むことを特徴とする請求項1に記載の1つまたは複数のプロセッサアクセス可能記録媒体。 - 実行されたとき、前記送信元装置に、さらに、
接続カウンタに応答して前記フロー識別子を選択する動作を実行するように指示する前記プロセッサ実行可能命令を含むことを特徴とする請求項1に記載の1つまたは複数のプロセッサアクセス可能記録媒体。 - 前記プロセッサ実行可能命令は、実行されたとき、前記送信元装置に、さらに、
前記接続の後続パケットをカプセル化するために前記フロー識別子を使用して前記後続パケットを前記選択されたターゲット装置に転送する動作
を実行するように指示することを特徴とする請求項1に記載の1つまたは複数のプロセッサアクセス可能記録媒体。 - 接続を移行するように構成される接続マイグレータであって、プロトコルスタックにわたる接続に関するプロトコル状態をコンパイルすることができ、前記接続に関するデータと前記コンパイルされたプロトコル状態とを集約することによって前記接続に関する接続状態を集約し、前記接続に対応するパケットを識別するためのフロー識別子と前記接続状態とからバイナリブロブを作成するように適合され、前記ターゲット装置の第2のプロトコルスタックに前記接続状態の注入をするために、前記バイナリブロブを前記ターゲット装置に送信することによって前記ターゲット装置に前記接続状態を送信し、移行される接続を識別する発信元/宛先アドレス情報対を前記フロー識別子にマッピングすることにより、カプセル化されたパケットのフローを識別するように前記フロー識別子を働かせる接続マイグレータ
を含むことを特徴とする装置。 - 前記接続マイグレータは、少なくとも部分的にソフトウェアで実現されることを特徴とする請求項9に記載の装置。
- 前記装置は、さらに、
前記接続を受諾することができ接続移行コマンドを前記接続マイグレータに発行するように適合されるクラシファイヤ
を含むことを特徴とする請求項9に記載の装置。 - 前記コンパイルされたプロトコル状態と共に集約された前記接続状態に集約されるデータは、前記クラシファイヤによって肯定応答されたデータを含むことを特徴とする請求項11に記載の装置。
- 前記接続マイグレータは、
前記装置のネットワークスタック内で前記プロトコルスタックの上に位置するマイグレータシムと、
前記装置の前記ネットワークスタック内で前記プロトコルスタックの下に位置するマイグレータ中間ドライバと
を含むことを特徴とする請求項9に記載の装置。 - 前記マイグレータシムは、前記プロトコルスタックと、前記装置の前記ネットワークスタックのソケットレイヤとの間に位置し、
前記マイグレータ中間ドライバは、前記プロトコルスタックと、前記装置の前記ネットワークスタックの少なくとも1つのミニポートとの間に位置する
ことを特徴とする請求項13に記載の装置。 - 前記マイグレータ中間ドライバは、前記装置の前記ネットワークスタックのプロトコルハードウェアインターフェースレイヤに位置することを特徴とする請求項14に記載の装置。
- 前記マイグレータシムは、接続移行コマンドを受け取り、前記接続移行コマンドを前記プロトコルスタックに伝搬させるように適合され、
前記マイグレータ中間ドライバは、前記コンパイルされたプロトコル状態との後の集約のために前記接続に関する前記データのコピーをダイバートするように適合される
ことを特徴とする請求項13に記載の装置。 - 前記マイグレータ中間ドライバは、集約された前記接続状態および前記接続の前記フロー識別子をバイナリブロブに束ねるように適合されることを特徴とする請求項13に記載の装置。
- 前記接続は、伝送制御プロトコル/インターネットプロトコル(TCP/IP)接続を含み、前記コンパイルされたプロトコル状態は、TCP/IP接続に関する情報を含むことを特徴とする請求項9に記載の装置。
- 前記装置は、さらに、
接続移行コマンドに応答して、前記接続に関する前記プロトコル状態を前記コンパイルされたプロトコル状態にコンパイルするように適合された前記プロトコルスタック
を含むことを特徴とする請求項9に記載の装置。 - 接続操作の構成であって、
ターゲット装置の第1の接続状態を送信元装置で受信する手段と、
クライアントからの接続を受諾する手段と、
クライアントからの接続に関するデータを前記送信元装置で受信する手段と、
前記送信元装置のプロトコル状態と前記接続に関するデータとを集約することによって、前記送信元装置の前記接続に関する第2の接続状態を集約する集約手段と、
前記接続に対応するパケットを識別するためのフロー識別子と前記第2の接続状態とからバイナリブロブを作成する手段と、
前記バイナリブロブを前記ターゲット装置に送信することによって前記第2の接続状態を前記送信元装置から前記ターゲット装置に転送する手段と、
前記送信元装置から前記ターゲット装置に接続を移行する移行手段と、
移行される接続に関するパケットをカプセル化されたフォーマットで前記送信元装置から前記ターゲット装置へトンネリングするトンネリング手段と
を含み、
前記トンネリング手段は、
個々の前記フロー識別子を個々の発信元/宛先アドレス情報対にマッピングするマッピング手段を含み、それぞれの前記発信元/宛先アドレス情報対は、それぞれの移行される接続を識別する、マッピング手段を含む
ことを特徴とする構成。 - 前記移行手段は、
プロトコル状態からおよび移行される前記接続に関して肯定応答されたデータから前記接続状態を集約する集約手段
を含むことを特徴とする請求項20に記載の構成。 - 前記集約手段は、
プロトコルスタックから前記プロトコル状態をコンパイルするコンパイル手段
を含むことを特徴とする請求項21に記載の構成。 - 前記トンネリング手段は、
前記移行される接続に関する前記パケットの発信元/宛先アドレス情報対の少なくとも一部を置換する前記フロー識別子を使用して、前記パケットをカプセル化するカプセル化手段
を含むことを特徴とする請求項20に記載の構成。 - 前記移行手段は、
移行される前記接続のパケットをカプセル化するのに使用可能な前記フロー識別子と共に前記接続状態を束にするドライバ手段
を含むことを特徴とする請求項20に記載の構成。 - 前記移行手段は、
移行される前記接続の前記接続状態のプロトコル状態部分をネットワークスタックのプロトコルスタック部分に注入する注入手段
を含むことを特徴とする請求項20に記載の構成。 - 前記トンネリング手段は、
前記パケットの発信元/宛先アドレス情報対の少なくとも一部にリンクするフロー識別子を使用して、前記移行される接続の前記トンネリングされるパケットを非カプセル化する非カプセル化手段
を含むことを特徴とする請求項20に記載の構成。 - 前記移行手段は、
前記移行される接続に関する前記トンネリングされるパケットを、前記カプセル化されたフォーマットでダイバートし、前記トンネリング手段に向けるドライバ手段
を含むことを特徴とする請求項20に記載の構成。 - 前記構成は、少なくとも1つの装置を含むことを特徴とする請求項20に記載の構成。
- 前記構成は、1つまたは複数のプロセッサアクセス可能記録媒体を含むことを特徴とする請求項20に記載の構成。
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EP1494422B1 (en) | 2008-12-03 |
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HK1069940A1 (en) | 2005-06-03 |
CN1607781A (zh) | 2005-04-20 |
AU2004202403A1 (en) | 2005-01-20 |
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KR101169073B1 (ko) | 2012-07-27 |
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US7606929B2 (en) | 2009-10-20 |
CA2470420A1 (en) | 2004-12-30 |
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MY140059A (en) | 2009-11-30 |
BRPI0402571A (pt) | 2005-05-24 |
CA2470420C (en) | 2012-01-24 |
KR20050002608A (ko) | 2005-01-07 |
TW200508963A (en) | 2005-03-01 |
JP2005027304A (ja) | 2005-01-27 |
CN1607781B (zh) | 2014-06-04 |
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