File system and disk administration
File System and Disk Administration
... dùng lệnh newfs), mkswap tạo swap file system Ví dụ mke2fs /dev/hda1 mkswap /dev/hda2 Mounting and unmounting file systems Mounting file systems Nh ta biêt hệ thống file UNIX đợc lu trữ dới dạng ... dùng Linux ext2 Kiểu filesystem đợc dùng chủ yếu Linux partition iso9660 Kiểu ISO 9660 filesystem đợc dùng với CD-ROM disks sysv Kiểu Nhằm hỗ trợ cho dạng UNIX System V filesystem msdos Kiểu ... tất file systems đợc mount Chi tiết lệnh xem tài liệu ứng với loại hệ điều hành UNIX Unmounting file systems Để bỏ mount hệ thống file dùng lệnh umount umountall Lệnh umount: Bỏ mount hệ thống file...
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File system and Disk Administration
... lệnh newfs), mkswap tạo swap file system Ví dụ mke2fs /dev/hda1 mkswap /dev/hda2 Mounting and unmounting file systems Mounting file systems Như ta đ biêt hệ thống file UNIX lưu trữ dạng thư mục ... Kiểu filesystem dùng chủ yếu Linux partition ỹ iso9660 Kiểu ISO 9660 filesystem dùng với CD-ROM disks 76 Giới thiệu UNIX- Một số thao tác UNIX ỹ sysv Kiểu Nhằm hỗ trợ cho dạng UNIX System V filesystem ... UNIX Để tạo hệ thống file cần thực bước sau: ỹ Chọn quyền hạn đĩa ỹ Tạo partition ỹ Tạo file system Mỗi loại UNIX có công cụ khác để tạo file system Thông thường dùng lệnh fdisk, format, fdformat,...
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The Practice of System and Network Administration Second Edition phần 1 docx
... 4 5 10 11 12 12 13 13 14 14 15 vii viii Contents 1. 20 1. 21 1.22 1. 23 1. 24 1. 25 1. 26 1. 27 1. 28 1. 29 1. 30 1. 31 1.32 1. 33 1. 34 1. 35 1. 36 1. 37 1. 38 1. 39 1. 40 1. 41 1.42 1. 43 1. 44 1. 45 1. 46 1. 47 1. 48 ... Authors Part I xxv xxxv xxxvii Getting Started 1 What to Do When 1. 1 1. 2 1. 3 1. 4 1. 5 1. 6 1. 7 1. 8 1. 9 1. 10 1. 11 1 .12 1. 13 1. 14 1. 15 1. 16 1. 17 1. 18 1. 19 Building a Site from Scratch Growing a Small ... Independence 10 9 5 .1. 7 Environment 11 0 5 .1. 8 Restricted Access 11 1 5 .1. 9 11 2 Single or Multiple Servers 11 5 5 .1. 11 Centralization and Standards 11 6 5 .1. 12 Performance 11 6 5 .1. 13 Monitoring 11 9 5 .1. 14 5.2...
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The Practice of System and Network Administration Second Edition phần 2 doc
... and activates the second system or automatically the second system monitors the first system and activates itself (if it has determined that the first one is unavailable) 4 .2 The Icing 87 Other ... to gather data and sum them Instead, send a longer SQL query to the server that gathers the data, sums them, and returns just the result Mathematically speaking, the problem is as follows The ... prevent the entire system from working, the system can automatically activate the hot spare disk, making it part of whichever RAID set needs it This makes the system n + The more quickly the system...
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The Practice of System and Network Administration Second Edition phần 3 docx
... European office Secondary European office New Jersey office Texas office Main U.S office Secondary U.S office Florida office Colorado office Main Asian office Singapore office Secondary Asian office ... hold the machines and lighting in the data center, the HVAC system, the UPS charging, the phone switches, the SA work area, and the customer service center The security-access system is also on the ... overhead for the network administration staff to learn the 214 Chapter Networks configurations and quirks of the diverse equipment and to track software upgrades and bugs Minimizing the number of vendors...
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The Practice of System and Network Administration Second Edition phần 4 docx
... authentication system that implements the policy The set of identities and information stored in the authentication and authorization systems is one of the namespaces at a site Managing this and ... without the consent and supervision of the telecom or networking group and instituted regular physical checks of all computer and communications rooms and the wiring between them 11.1 .4 Management and ... with the rest of your network infrastructure? – Will it use your existing authentication system? – What kind of load does it put on the network and other key systems? – If it has to talk to other...
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The Practice of System and Network Administration Second Edition phần 5 pps
... JOHN SMITH (55 5 )55 5-1234 JANE JONES (55 5 )55 5-4321 ALICE WALTER (55 5 )55 5-7890 800 -55 5 -55 55 pin 123 456 Backout Plan: None *** BOTTOM OF DATA *** Figure 17.1 Sample change-freeze, or network quiet ... misprogrammed server The SAs had done their best to debug the problem using their knowledge of their part of the system, yet the problem remained unsolved Suddenly, one of the senior SAs with ... changes they will make, the systems and services affected, the reasons for the change, the risks, the test procedure, the back-out plan, how long the change will take to implement, and how long the...
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The Practice of System and Network Administration Second Edition phần 6 doc
... be unable to meet the demands placed on it by some of the departments in the company Before abandoning the centralized service, try to understand the reason for the failures of the central group ... questions, the SAs realize that they need to monitor the systems in question and gather utilization data over a period of time in order to see the trends and the peaks in usage There are many other ... Ideally, the amount of condensing that the system does and the expiration time of the data should be configurable You also need to consider how the monitoring system gathers its data Typically, a system...
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The Practice of System and Network Administration Second Edition phần 7 potx
... The speed of a backup is limited by the slowest of the following factors: read performance of the disk, write performance of the backup medium, bandwidth, and latency of the network between the ... printed pretty labels for the tape covers However, the system failed to reduce the thinking aspect of the job The software did a grand job of issuing the right backup commands at the right time, used ... Understanding the basic relationship of storage devices to the operating system and to the file system gives you a richer understanding of the way that large storage solutions are built up out of...
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The Practice of System and Network Administration Second Edition phần 8 ppt
... deciding on the size of the SA team, the management of the organization should take into account several factors: the number and variety of people and machines in the company the complexity of the environment, ... after the old one timed out, because the operating system was not releasing the connection Fortunately, one of the SAs on another part of the project was familiar with this behavior and knew of the ... part of a profit center that can directly see the results of its investment in system administration However, other parts of the company may suffer because the people setting the priorities for the...
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The Practice of System and Network Administration Second Edition phần 9 pps
... isolated, unimportant, and not part of the team The longer people stay with the group and the less turnover there is, the more they will feel part of the team and the more likely they are to stick ... the business goals of the company and of the group The relationships with the nontechnical managers are key to the technical manager’s success and job satisfaction Use Analogies They Understand ... glue together mail servers out of a UNIX box, POP3 (Myers and Rose 199 6) and IMAP4 (Crispin 199 6) software, and an MTA, such as Sendmail or Postfix • Build the solution from scratch The highest...
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The Practice of System and Network Administration Second Edition phần 10 pdf
... many of them found that they had no network connection: the CEO, the entire customer-support department, the Cowboy’s management chain, and many of the engineers The helpdesk and the rest of the ... the current OS release, the current OS distribution, the current brand of computers, amount of bandwidth, and type of network topology The Staller doesn’t see the lack of technology refresh and ... existing systems and improving them, scaling large systems into humongous systems, and overhauling legacy systems and replacing them with newer systems Infrastructure Builders are proud of their...
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The Design and Implementation of a Log-Structured File System
... purpose The separate data area of these database systems means that they not need the segment cleaning mechanisms of the Sprite LFS to reclaim log space The space occupied by the log in a database system ... log as the most up to date ‘‘truth’’ about the state of the data on disk The main difference is that database systems not use the log as the final repository for data: a separate data area is reserved ... has the disadvantage of increasing the amount of data lost during a crash For this paper we will assume that crashes are infrequent and that it is acceptable to lose a few seconds or minutes of...
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Navigating the Windows 2000 File System with “Windows Explorer” and “My Computer”
... Step 1: Navigating the Windows 2000 file system using Windows Explorer Right-click the My Computer icon on the desktop or right-click the Start button and select Explore from the menu Locate the ... icon and click on the (+) sign to expand the contents of the drive If the user clicks directly on the drive, the contents of the drive will be displayed on the right side of the screen On the ... on the desktop This will display all of the drives located on the system Click on the folder view button located on the menu bar A drop-down menu displays the folder and file options in “My Computer”...
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File System Performance and Transaction Support
... are File 1: 1110 File 2: 1100 File 3: 1000 Level Entry Map Data blocks File 4: 1100 File 5: 0011 File 6: 0001 File 1: 1101 File 1: 0001 File 1: 1111 File 2: 1100 File 2: 1001 File 2: 1000 File ... File System Performance and Transaction Support copyright © 1992 by Margo Ilene Seltzer Abstract File System Performance and Transaction Support by Margo Ilene Seltzer ... on FFS Performance 7-4: Maximum File System Read Bandwidth 7-5: Small File Performance 7-6: Multi-User Andrew Performance 7-7: Multi-User Andrew Performance...
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