日本語 dropdown-ico

Quantum 6-01376-07の取扱説明書

32ページ 0.27 mb
ダウンロード

ページに移動 of 32

Summary
  • Quantum 6-01376-07 - page 1

    6-01376-07 StorNext 3.1 ® StorNext File System T uning Guide File System T uning Guide File System T uning Guide ...

  • Quantum 6-01376-07 - page 2

    StorNext 3.1 File System Tuning Guide, 6-01376-07 , Ver. A, Rel. 3.1 , October 2007, Made in USA. Quantum Corporation provides this publ ication “as is” without warranty of an y kind, either express or implied, including but not limited to the implied warranties of merc hantability or fitness for a particular purpose. Quantum Corporation may re ...

  • Quantum 6-01376-07 - page 3

    StorNext File System Tuning Gu ide i Content s Chapter 1 StorNext File System Tuning 1 The Underlying Storage System ............. ... ......... .............. .............. .............. ... 1 RAID Cache Configuration .............. .............. .............. ............... .............. 2 RAID Write-Back Caching .... .............. ....... ...

  • Quantum 6-01376-07 - page 4

    StorNext File System Tuning Guide 1 0 S torNext File System T uning The StorNext File System (SNFS) pr ovides extremely high performance for widely varying scenarios. Many factors determine the level of performance you will realiz e. In particular, the performance characteristics of the underlying st orage system are the most critical factors. Howe ...

  • Quantum 6-01376-07 - page 5

    StorNext File System T uning The Underlying Storage System StorNext File System Tuning Guide 2 RAID Cache Configuration 0 The single most i mportant RAID tuning component is the cache configuration. This is particular ly t rue for small I/O operat ions. Contemporary RAID systems such as the EMC CX series and the various Engenio systems provide exce ...

  • Quantum 6-01376-07 - page 6

    StorNext File System T uning The Underlying Storage System StorNext File System Tuning Guide 3 File System Mana ger (FSM) stati stics reports in the cvlog file. For example, here is a message line from the cvlog file: PIO HiPriWr SUMMAR Y SnmsMetaDisk0 sysavg/350 sysmin/333 sysmax/367 This statistics message rep orts av erage, minimum, and maximum ...

  • Quantum 6-01376-07 - page 7

    StorNext File System T uning The Underlying Storage System StorNext File System Tuning Guide 4 unusual cases, it severely degrades typical sce narios. Therefore, it is unsuitable for most environments. RAID Level, Segment Size, and S tripe Size 0 Configuration settings such as RAID level, segment si ze, and stripe size are very important and cannot ...

  • Quantum 6-01376-07 - page 8

    StorNext File System T uning File Size Mix and Application I/O Characteristics StorNext File System Tuning Guide 5 File Size Mix and Application I/O Characteristics It is always valuabl e to understand th e file size mix of the target dataset as well as the application I/O characte ristics. This includes t he number of concurrent streams, proportio ...

  • Quantum 6-01376-07 - page 9

    StorNext File System T uning File Size Mix and Application I/O Characteristics StorNext File System Tuning Guide 6 It is usually best to configure the RA ID stripe size no greater than 256K for optimal small file buffer cache performance. For more buffer cache configuration settings, see Mount Command Options on page 17. NFS / CIFS 0 It i s b es t ...

  • Quantum 6-01376-07 - page 10

    StorNext File System T uning The Metadata Network StorNext File System Tuning Guide 7 The Metadat a Network As with any client/server protocol, SNFS perfor mance is subject to the limitations of the underlying network. Therefore, it is recommended that you use a dedicated Metadata Networ k to avoid contention with other network traffic. Either 100B ...

  • Quantum 6-01376-07 - page 11

    StorNext File System T uning The Metadata Controller System StorNext File System Tuning Guide 8 Some metadata operations such as fi le creation can be CPU intensive, and benefit from increased CPU power. The MDC platform is important in these scenarios because lower clock- speed CPUs such as Sparc and M ips degrade performance. Other operations can ...

  • Quantum 6-01376-07 - page 12

    StorNext File System T uning The Metadata Controller System StorNext File System Tuning Guide 9 Example: [stripeGroup RegularFiles] S tatus UP Exclusive No ##Non-Exclusive stripeGroup for all Fi les## Read Enabled Wr it e Enabled S trip eBreadth 256K MultiPathMethod Rotate Node CvfsDisk6 0 Node CvfsDisk7 1 Affinities 0 Affinities are another stripe ...

  • Quantum 6-01376-07 - page 13

    StorNext File System T uning The Metadata Controller System StorNext File System Tuning Guide 10 Str i p eB re a dth 0 T h i s s e t t i n g m u s t m a t c h t h e R A I D s t r i p e s i z e o r b e a m u l t i p l e o f t h e R A I D stripe size. Matching th e RAID stripe size i s usually the most optimal setting. However, depending on the RAID ...

  • Quantum 6-01376-07 - page 14

    StorNext File System T uning The Metadata Controller System StorNext File System Tuning Guide 11 InodeCacheSize 0 This setting consumes about 800-1000 bytes of memory times the nu mber specified. Increasing t his value can reduce latency of any metadat a operation by performing a hot cache access to inode information instead of an I/O to get inode ...

  • Quantum 6-01376-07 - page 15

    StorNext File System T uning The Metadata Controller System StorNext File System Tuning Guide 12 Settings greater than 64K are not recommended because performance will be adversel y impacted due to in efficient metad ata I/O operations. Values less than 16K are not reco mmended in most scenarios because startup and failover time may be ad versely i ...

  • Quantum 6-01376-07 - page 16

    StorNext File System T uning The Metadata Controller System StorNext File System Tuning Guide 13 man cvfs_config page.) T he snfsdefrag man page explains the command options in greater detail. FSM hourly statistics reporting is another very useful tool. This can show you the mix of metadata operations be ing invoked by cl ient processes, as well as ...

  • Quantum 6-01376-07 - page 17

    StorNext File System T uning The Metadata Controller System StorNext File System Tuning Guide 14 SNFS supports the Windows Perfmon utility. This provides many useful statistics counters for the SNFS client component. To instal l, obtain a copy of cvfsperf .dll from the SCM team in Denver and copy it into the c:/ winnt/system32 directory on the SN F ...

  • Quantum 6-01376-07 - page 18

    StorNext File System T uning The Metadata Controller System StorNext File System Tuning Guide 15 The “PERF: VFS” trace shows throughput measured for the read or write system call and significant aspects of the I/O, incl uding: •D m a : D M A •B u f : B u f f e r e d • Eof: File extended • Algn: Well-formed DMA I/O • Shr: File is share ...

  • Quantum 6-01376-07 - page 19

    StorNext File System T uning The Metadata Controller System StorNext File System Tuning Guide 16 • Identify read/modify/w rite condition. If buffered VFS writes are causing De vice reads, it might be beneficial to match I/O request size to a multiple of t he “cachebufsize” (default 64KB; see mount_cvfs man page). Another way to avoid this is ...

  • Quantum 6-01376-07 - page 20

    StorNext File System T uning The Metadata Controller System StorNext File System Tuning Guide 17 Mount Command Options 0 The following SNFS mount command settings are explained in greater detail in the mount_cvfs man page. The default size of the buffer cache varies by platform and main memory size, and ranges between 32MB and 256M B. And, by defau ...

  • Quantum 6-01376-07 - page 21

    StorNext File System T uning The Distributed LAN (Disk Proxy) Networks StorNext File System Tuning Guide 18 SNFS External API 0 The SNFS External API might be useful in some scenarios because it offers programmatic use of special SN FS performance capabilities such as affinities, preallocation, and quality of service. For more information, see the ...

  • Quantum 6-01376-07 - page 22

    StorNext File System T uning The Distributed LAN (Disk Proxy) Networks StorNext File System Tuning Guide 19 is set to auto-detect but the host is set to 1000Mb/full , you will observe a high error rate and extremely poor perfor mance. On Linux the ethto ol command can be very useful to invest igate and a djust speed/duplex settings. In some cases, ...

  • Quantum 6-01376-07 - page 23

    StorNext File System T uning The Distributed LAN (Disk Proxy) Networks StorNext File System Tuning Guide 20 Figure 1 Multi-NIC Hardware and IP Configurati on Diagram In the diagram there are two subnetwork s: the blue subnetwork (10.0.0.x) and the red subnetwork (192.168.9.x). Se rvers such as S1 are connecte d to both the blue and red subnetwork s ...

  • Quantum 6-01376-07 - page 24

    StorNext File System T uning Distributed LAN Servers StorNext File System Tuning Guide 21 Distributed LAN Servers Distributed LAN Servers must ha ve suff icient memory. When a Distributed LAN Server does not have sufficient me mory, its performance in servicing Distributed LAN I/O requests might suffer. In some cases (particul arly on Windows,) it ...

  • Quantum 6-01376-07 - page 25

    StorNext File System T uning Distributed LAN Client Vs. Legacy Network Attached Storage StorNext File System Tuning Guide 22 Performance 0 DLC outperforms NFS and CIFS for single-stream I/O and provides higher aggregate bandwidth. For in ferior NFS client implementations, the difference can be more th an a factor of two. DLC also makes extremely ef ...

  • Quantum 6-01376-07 - page 26

    StorNext File System T uning Windows Memory Requirements StorNext File System Tuning Guide 23 Therefore, DLC provides incr eased st abilit y that is comparable to the StorNext SAN Client. Consistent Security Model 0 DLC clients hav e the same security mo del as StorNext SAN clients. When CIFS and NFS are used, some security models aren’t supporte ...

  • Quantum 6-01376-07 - page 27

    StorNext File System T uning Windows Memory Requirements StorNext File System Tuning Guide 24 The first is the Directory Cach e Size . The default is 10 (MB). If you do not have large directories, or do not pe rform lots of directory scans, this number can be reduced to 1 or 2 MB. The impact wil l be slightly slower directory lookups in directories ...

  • Quantum 6-01376-07 - page 28

    StorNext File System T uning Sample FSM Configuration File StorNext File System Tuning Guide 25 Sample FSM Configuration File This sample configuration file is locat ed in the SNFS install directory under the examples subdirectory named example.cfg. # **************************************************************************** # A global section fo ...

  • Quantum 6-01376-07 - page 29

    StorNext File System T uning Sample FSM Configuration File StorNext File System Tuning Guide 26 MAX(StripeBreadth) # MaxMBPerClientReserve 50 # in MBs, default 100 MB reserved per client # OpHangLimitSecs 300 # default 180 secs # DataMigrationThreadPoolSize 128 # Managed only, default 8 # ************************************************************ ...

  • Quantum 6-01376-07 - page 30

    StorNext File System T uning Sample FSM Configuration File StorNext File System Tuning Guide 27 [Disk CvfsDisk4] Status UP Type VideoDrive [Disk CvfsDisk5] Status UP Type VideoDrive [Disk CvfsDisk6] Status UP Type VideoDrive [Disk CvfsDisk7] Status UP Type VideoDrive [Disk CvfsDisk8] Status UP Type VideoDrive [Disk CvfsDisk9] Status UP Type VideoDr ...

  • Quantum 6-01376-07 - page 31

    StorNext File System T uning Sample FSM Configuration File StorNext File System Tuning Guide 28 [Disk CvfsDisk17] Status UP Type DataDrive # **************************************************************************** # A stripe section for defining stripe groups. # **************************************************************************** [Strip ...

  • Quantum 6-01376-07 - page 32

    StorNext File System T uning Sample FSM Configuration File StorNext File System Tuning Guide 29 [StripeGroup AudioFiles] Status UP Exclusive Yes ##Exclusive StripeGroup for Audio File Only## Affinity AudioFiles Read Enabled Write Enabled StripeBreadth 1M MultiPathMethod Rotate Node CvfsDisk10 0 Node CvfsDisk11 1 Node CvfsDisk12 2 Node CvfsDisk13 3 ...

メーカー Quantum カテゴリー Webcam

Quantum 6-01376-07のメーカーから受け取ることができるドキュメントは、いくつかのグループに分けられます。その一部は次の通りです:
- #BRANDの図面#
- 6-01376-07の取扱説明書
- Quantumの製品カード
- パンフレット
- またはQuantum 6-01376-07の消費電力シール
それらは全部重要ですが、デバイス使用の観点から最も重要な情報は、Quantum 6-01376-07の取扱説明書に含まれています。

取扱説明書と呼ばれる文書のグループは、Quantum 6-01376-07の取り付け説明書、サービスマニュアル、簡易説明書、またはQuantum 6-01376-07のユーザーマニュアル等、より具体的なカテゴリーに分類されます。ご必要に応じてドキュメントを検索しましょう。私たちのウェブサイトでは、Quantum 6-01376-07の製品を使用するにあたって最も人気のある説明書を閲覧できます。

関連する取扱説明書

Quantum 6-01376-07デバイスの取扱説明書はどのようなものですか？
取扱説明書は、ユーザーマニュアル又は単に「マニュアル」とも呼ばれ、ユーザーがQuantum 6-01376-07を使用するのを助ける技術的文書のことです。説明書は通常、全てのQuantum 6-01376-07ユーザーが容易に理解できる文章にて書かれており、その作成者はその分野の専門家です。

Quantumの取扱説明書には、基本的な要素が記載されているはずです。その一部は、カバー/タイトルページ、著作権ページ等、比較的重要度の低いものです。ですが、その他の部分には、ユーザーにとって重要な情報が記載されているはずです。

1. Quantum 6-01376-07の説明書の概要と使用方法。説明書にはまず、その閲覧方法に関する手引きが書かれているはずです。そこにははQuantum 6-01376-07の目次に関する情報やよくある質問、最も一般的な問題に関する情報を見つけられるはずです。つまり、それらはユーザーが取扱説明書に最も期待する情報なのです。
2. 目次。Quantum 6-01376-07に関してこのドキュメントで見つけることができる全てのヒントの目次
3. Quantum 6-01376-07デバイスの基本機能を使うにあたってのヒント。 Quantum 6-01376-07のユーザーが使い始めるのを助けてくれるはずです。
4. トラブルシューティング。Quantum 6-01376-07に関する最も重要な問題を診断し、解決するために役立つ体系化された手続き
5. FAQ。よくある質問
6. 連絡先。一人では問題を解決できない場合に、その国におけるQuantum 6-01376-07のメーカー/サービスへの連絡先に関する情報。

Quantum 6-01376-07についてご質問がありますか？

次のフォームを使用してください

見つけた説明書を読んでもQuantum 6-01376-07の問題を解決できない場合、下記のフォームを使用して質問をしましょう。ユーザーのどなたかがQuantum 6-01376-07で同様の問題を抱えていた場合、その解決方法を共有したいと考えるかもしれません。

画像のテキストを入力してください

Captcha
新しい画像

コメント (0)