JP2014029700A - 空間最適化ブロックデバイスのためのシステムソフトウェアインタフェース - Google Patents
空間最適化ブロックデバイスのためのシステムソフトウェアインタフェース Download PDFInfo
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Abstract
【解決手段】インタフェースは、ハイパーバイザが、LUNが薄く供給されるか否かの、論理装置番号(LUN)の機能を発見することを可能にするために、ハイパーバイザ内に、更に、仮想マシン(VM)が、仮想ディスクが薄く供給されるか否かの、仮想ディスクの機能を発見することを可能にするためにVM内に設けられる。これらの機能の発見は、ストレージデバイスがその中で実現されたストレージ空間最適化法から利益を得続けることができるように、ハイパーバイザ又はVMが、論理ブロックデバイスに以前に割り当てられたブロックの割当てを解除する動作のような特定の動作を実施するように下位ストレージデバイスに指示することを可能にする。
【選択図】図3
Description
[0003]仮想化ソフトウェアは、また、ハイパーバイザと称され、仮想ディスクに対するゲストオペレーティングシステムのアクセスを管理し、かつ、仮想ディスクを、ホストプラットホーム上に、又はストレージエリアネットワーク(SAN)若しくはネットワーク接続ストレージ(NAS)のような、リモートストレージデバイス内に存在する下位物理ストレージ資源にマップする。複数仮想マシンが単一ホスト上にインスタンス化可能であるので、物理ストレージ空間を組織のデータセンター内のすべてのインスタンス化された仮想マシンに対応する仮想ディスクに割り当てることは、データセンターの物理ストレージ空間容量に圧迫を加える可能性がある。例えば、仮想マシンに仮想ディスクを供給するときには、仮想ディスクが最初に作り出された時点で仮想化ソフトウェアが全ての物理ディスク空間を仮想ディスクに割り当て、時にはゼロだけを含有する多数の空のデータブロック(「0ブロック」)を作り出す場合がある。しかしながら、仮想ディスクに割り当てられた物理ストレージ空間が仮想マシンによって折よく用いられない(又は決して用いられない)かもしれないので、この種の割当てはストレージ非効率性に結びつくかもしれない。「シン・プロビジョニング(thin provisioning)」として知られる、1つの解決策において、仮想化ソフトウェアは、この種の物理ストレージ空間が仮想マシンによって実際に必要な時だけ、仮想ディスクに物理ストレージ空間を動的に割り当て、必ずしも仮想ディスクが最初に作り出された時に割り当てない。
Claims (4)
- プロセッサ、メモリ及び論理ブロックデバイスを含むハードウェア資源と、
1台以上の仮想マシンの実行をサポートし、かつエミュレートされた論理ブロックデバイスを含む前記仮想マシンの前記ハードウェア資源をエミュレートするハイパーバイザと、を備えるコンピュータシステムであって、
前記ハイパーバイザは、前記論理ブロックデバイスからストレージブロックの割当てを解除するために前記論理ブロックデバイスにコマンドを発行するためのコンポーネントを含み、及び前記仮想マシンの各々は、前記エミュレートされた論理ブロックデバイスからストレージブロックの割当てを解除するために前記エミュレートされた論理ブロックデバイスにコマンドを発行するためのコンポーネントを含むことを特徴とするシステム。 - 前記論理ブロックデバイスに対する前記コマンドが整合及び粒度値に基づいて発行され、それに従って前記論理ブロックデバイスが、空間再利用動作を実行し、及び、前記エミュレートされた論理ブロックデバイスに対する前記コマンドが整合及び粒度値に基づいて発行され、それに従って前記エミュレートされた論理ブロックデバイスが、空間再利用動作を実行することを特徴とする請求項1のコンピュータシステム。
- 前記ハイパーバイザが、割当てを解除されるべきであるが前記論理ブロックデバイスの前記整合及び粒度値と互換性がないストレージブロックが識別される第1のデータ構造を管理し、及び前記仮想マシンの各々が割当てを解除されるべきであるが前記エミュレートされた論理ブロックデバイスの前記整合及び粒度値と互換性がないストレージブロックが識別される第2のデータ構造を管理することを特徴とする請求項2のコンピュータシステム。
- 前記ハイパーバイザがストレージブロックに対する書込みを検出する場合に、前記ハイパーバイザは前記第1のデータ構造から前記ストレージブロックを除去し、及び、前記仮想マシンがストレージブロックに対する書込みを検出する場合には、前記仮想マシンの各々が前記第2のデータ構造から前記ストレージブロックを除去することを特徴とする請求項3のコンピュータシステム。
Applications Claiming Priority (4)
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US37807610P | 2010-08-30 | 2010-08-30 | |
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US13/181,163 US9411517B2 (en) | 2010-08-30 | 2011-07-12 | System software interfaces for space-optimized block devices |
US13/181,163 | 2011-07-12 |
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JP2011186106A Division JP5357938B2 (ja) | 2010-08-30 | 2011-08-29 | 空間最適化ブロックデバイスのためのシステムソフトウェアインタフェース |
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JP2014029700A true JP2014029700A (ja) | 2014-02-13 |
JP5960103B2 JP5960103B2 (ja) | 2016-08-02 |
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JP2011186106A Active JP5357938B2 (ja) | 2010-08-30 | 2011-08-29 | 空間最適化ブロックデバイスのためのシステムソフトウェアインタフェース |
JP2013177455A Active JP5960103B2 (ja) | 2010-08-30 | 2013-08-29 | 空間最適化ブロックデバイスのためのシステムソフトウェアインタフェース |
JP2013177456A Pending JP2014013592A (ja) | 2010-08-30 | 2013-08-29 | 空間最適化ブロックデバイスのためのシステムソフトウェアインタフェース |
JP2015162645A Active JP6122078B2 (ja) | 2010-08-30 | 2015-08-20 | 空間最適化ブロックデバイスのためのシステムソフトウェアインタフェース |
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JP2013177456A Pending JP2014013592A (ja) | 2010-08-30 | 2013-08-29 | 空間最適化ブロックデバイスのためのシステムソフトウェアインタフェース |
JP2015162645A Active JP6122078B2 (ja) | 2010-08-30 | 2015-08-20 | 空間最適化ブロックデバイスのためのシステムソフトウェアインタフェース |
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EP (3) | EP3101543B1 (ja) |
JP (4) | JP5357938B2 (ja) |
AU (1) | AU2011218672B2 (ja) |
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EP3101544B1 (en) | 2018-05-02 |
EP2423814B1 (en) | 2016-08-03 |
JP5357938B2 (ja) | 2013-12-04 |
JP6122078B2 (ja) | 2017-04-26 |
EP3101544A1 (en) | 2016-12-07 |
US9411517B2 (en) | 2016-08-09 |
US20120054746A1 (en) | 2012-03-01 |
AU2011218672B2 (en) | 2014-02-20 |
EP3101543B1 (en) | 2018-05-02 |
JP2015232906A (ja) | 2015-12-24 |
AU2011218672A1 (en) | 2012-03-15 |
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