JP2014519112A - 記憶デバイスにおいて少ないオーバープロビジョニングで低い書き込み増幅率を実現する方法 - Google Patents
記憶デバイスにおいて少ないオーバープロビジョニングで低い書き込み増幅率を実現する方法 Download PDFInfo
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
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- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
- G06F12/023—Free address space management
- G06F12/0238—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory
- G06F12/0246—Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory in block erasable memory, e.g. flash memory
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
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- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
- G06F3/0652—Erasing, e.g. deleting, data cleaning, moving of data to a wastebasket
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
- G06F3/0679—Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
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- G06F2212/00—Indexing scheme relating to accessing, addressing or allocation within memory systems or architectures
- G06F2212/72—Details relating to flash memory management
- G06F2212/7209—Validity control, e.g. using flags, time stamps or sequence numbers
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Abstract
【選択図】図1
Description
本願は、2012年5月2日に提出された米国登録実用新案第13/461,899号公報の優先権と、2011年5月24日に提出された米国仮出願第61/489,628号の便益とを主張する。上記出願の開示はそれらの全体が参照により本明細書に組み込まれる。
Claims (16)
- ソリッドステートドライブ(SSD)であり、
前記SSDに関連付けられた複数の論理アドレスのそれぞれに格納されるデータがどのくらい頻繁に更新されるのかに対応する頻度を判断し、前記頻度に基づいて前記複数の論理アドレスからなる複数のグループを形成するSSD制御モジュールと、
前記データを、前記複数のグループに基づいてSSD記憶領域のブロック内の物理アドレスに書き換えるメモリ制御モジュールと
を備え、
前記複数のグループを形成することは、
前記複数の論理アドレスのそれぞれに格納される前記データがどのくらい頻繁に更新されるのかを示す、最も直近で使用されてない前記複数の論理アドレスのリスト(LRUリスト)を生成することと、
前記LRUリスト内の前記複数の論理アドレスの異なる範囲にそれぞれ対応し、前記複数の論理アドレスのうち少なくとも1つをそれぞれ含む複数のゾーンを含むゾーンリストを前記LRUリストに基づいて生成することと
を含む、ソリッドステートドライブ。 - 前記SSD制御モジュールは、
前記LRUリストを生成するLRUモジュールと、
前記ゾーンリストを生成するゾーン制御モジュールと
を有する、請求項1に記載のソリッドステートドライブ。 - 前記複数の論理アドレスは複数の論理ブロックアドレス(LBA)を含む、請求項1または2に記載のソリッドステートドライブ。
- 前記メモリ制御モジュールは、前記複数のゾーンのうち第1ゾーンに関連付けられた第1論理アドレスの第1データを、前記SSD記憶領域の第1ブロックに書き換え、前記複数のゾーンのうち第2ゾーンに関連付けられた第2論理アドレスの第2データを、前記SSD記憶領域の第2ブロックに書き換える、請求項1から3のいずれか1項に記載のソリッドステートドライブ。
- 前記SSD記憶領域はフラッシュメモリアレイを含む、請求項1から4のいずれか1項に記載のソリッドステートドライブ。
- 前記SSD制御モジュールは、ファームウェアを実行するプロセッサを有する、請求項1から5のいずれか1項に記載のソリッドステートドライブ。
- 前記LRUリストおよび前記ゾーンリストは、揮発性メモリと不揮発性メモリとのうち少なくとも一方に格納される、請求項1から6のいずれか1項に記載のソリッドステートドライブ。
- 前記SSDに関連付けられた第1の数の物理アドレスは、第2の数の前記複数の論理アドレスよりも多く、
前記第1の数と前記第2の数との差の、前記第2の数に対する比率は5%未満である、請求項1から7のいずれか1項に記載のソリッドステートドライブ。 - 前記SSDの書き込み増幅率は約1.1である、請求項8に記載のソリッドステートドライブ。
- ソリッドステートドライブ(SSD)の動作方法であり、
前記SSDに関連付けられた複数の論理アドレスのそれぞれに格納されるデータがどのくらい頻繁に更新されるのかに対応する頻度を判断する段階と、
前記頻度に基づいて前記複数の論理アドレスからなる複数のグループを形成する段階と
前記データを、前記複数のグループに基づいてSSD記憶領域のブロック内の物理アドレスに書き換える段階と
を備え、
前記複数のグループを形成する段階は、
前記SSDに関連付けられた前記複数の論理アドレスのそれぞれに格納される前記データがどのくらい頻繁に更新されるのかを示す、最も直近で使用されてない前記複数の論理アドレスのリスト(LRUリスト)を生成する段階と、
前記LRUリスト内の前記複数の論理アドレスの異なる範囲にそれぞれ対応し、前記複数の論理アドレスのうち少なくとも1つをそれぞれ含む複数のゾーンを含むゾーンリストを前記LRUリストに基づいて生成する段階と
を有する方法。 - 前記複数の論理アドレスは複数の論理ブロックアドレス(LBA)を含む、請求項10に記載の方法。
- 前記複数のゾーンのうち第1ゾーンに関連付けられた第1論理アドレスの第1データを、前記SSD記憶領域の第1ブロックに書き換え、前記複数のゾーンのうち第2ゾーンに関連付けられた第2論理アドレスの第2データを、前記SSD記憶領域の第2ブロックに書き換える段階をさらに備える、請求項10または11に記載の方法。
- 前記SSD記憶領域はフラッシュメモリアレイを含む、請求項10から12のいずれか1項に記載の方法。
- 前記LRUリストおよび前記ゾーンリストは、揮発性メモリと不揮発性メモリとのうち少なくとも一方に格納される、請求項10から13のいずれか1項に記載の方法。
- 前記SSDに関連付けられた第1の数の物理アドレスは、第2の数の前記複数の論理アドレスよりも多く、
前記第1の数と前記第2の数との差の、前記第2の数に対する比率は5%未満である、請求項10から14のいずれか1項に記載の方法。 - 前記SSDの書き込み増幅率は約1.1である、請求項15に記載の方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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US201161489628P | 2011-05-24 | 2011-05-24 | |
US61/489,628 | 2011-05-24 | ||
PCT/US2012/036070 WO2012161933A1 (en) | 2011-05-24 | 2012-05-02 | Method for storage devices to achieve low write amplification with low over provision |
US13/461,899 US9678676B2 (en) | 2011-05-24 | 2012-05-02 | Method for storage devices to achieve low write amplification with low over provision |
US13/461,899 | 2012-05-02 |
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JP2014519112A true JP2014519112A (ja) | 2014-08-07 |
JP6016137B2 JP6016137B2 (ja) | 2016-10-26 |
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US (1) | US9678676B2 (ja) |
EP (1) | EP2715510B1 (ja) |
JP (1) | JP6016137B2 (ja) |
KR (1) | KR101982251B1 (ja) |
CN (1) | CN103562842B (ja) |
WO (1) | WO2012161933A1 (ja) |
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JP2018516410A (ja) * | 2015-12-17 | 2018-06-21 | ▲騰▼▲訊▼科技(深▲セン▼)有限公司 | ストレージデバイスを管理するための方法および装置 |
US10198180B2 (en) | 2015-12-17 | 2019-02-05 | Tencent Technology (Shenzhen) Company Limited | Method and apparatus for managing storage device |
JP2018200720A (ja) * | 2018-08-27 | 2018-12-20 | 東芝メモリ株式会社 | メモリシステム |
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CN103562842A (zh) | 2014-02-05 |
US20120303873A1 (en) | 2012-11-29 |
WO2012161933A1 (en) | 2012-11-29 |
KR20140035426A (ko) | 2014-03-21 |
EP2715510A1 (en) | 2014-04-09 |
CN103562842B (zh) | 2018-09-14 |
JP6016137B2 (ja) | 2016-10-26 |
US9678676B2 (en) | 2017-06-13 |
KR101982251B1 (ko) | 2019-05-24 |
EP2715510B1 (en) | 2018-05-02 |
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