Ch18 system administration
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Network file sharing allows files to be accessed over a network. It employs Remote Procedure Calls and requires setup of both server and client software. While convenient for users, it complicates administration and can introduce security issues if not configured properly. NFS and SMB are common network file sharing protocols, each with their own advantages and disadvantages.
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The document discusses several distributed file systems including NFS, AFS, and CODA. NFS uses a stateless design with UDP and allows clients to access remote files transparently like local files. AFS uses whole file caching at clients and call backs to ensure cache coherence. CODA extends AFS to support disconnected operation and user mobility through caching and logging updates locally when disconnected.
pNFS Introduction
Parallel NFS (pNFS) is a standard defined in NFSv4.1 that separates file metadata and data to allow parallel and distributed access to file data. It defines protocols for clients to communicate with a metadata server to get file layouts describing the data locations and protocols to access multiple data servers directly in parallel. However, it does not define protocols between metadata and data servers, allowing flexibility in implementation. pNFS supports various storage layout types including file, block, and object storage and can provide high performance parallel I/O while maintaining NFS semantics.
Ch19 system administration
The document discusses automating file sharing through automounting in Windows and Unix. Windows allows shares to automount on login but has no redundancy, while Unix automounters use map files and mount points to automatically mount file systems on demand for fault tolerance. Common map files include the mastermap, directmaps, and indirect auto_home map to provide a consistent namespace for users.
Tier 2 net app baseline design standard revised nov 2011
This document provides a baseline design standard for tier 2 NetApp storage. It specifies that NetApp filers provide file sharing using CIFS and NFS, with snapshots taken twice daily and backups to tape storage six nights a week. The filers use clustering for fault tolerance and data is replicated between data centers using Snapmirror. The baseline configuration includes dual heads, redundant power supplies, and management with Data Fabric Manager.
DFS PPT.pptx
In computing, a distributed file system (DFS) or network file system is any file system that allows access to files from multiple hosts sharing via a computer network. This makes it possible for multiple users on multiple machines to share files and storage resources.
Xen server storage Overview
This document provides an overview of how XenServer manages storage supplied to virtual machines. It describes how Linux views physical disks and partitions, as well as logical volume management and network file systems. The key concepts covered include storage repositories, virtual disk images, storage attributes, and different storage types like local, NFS, Fibre Channel, and appliance-based storage. The target audience is IT specialists who need to understand XenServer's storage concepts and terminology for planning virtualized infrastructures.
Linux filesystemhierarchy
The document describes the standard Linux filesystem hierarchy, including the purpose and some examples of the contents of the top-level directories like /bin, /boot, /dev, /etc, /home, /lib, /media, /mnt, /opt, /proc, /root, /sbin, /usr, and /var. Many directories contain essential system files and programs needed for booting, administration, and operation of the system, while others provide variable storage and mounting points for removable devices. The filesystem layout separates core operating system, user, and variable files for security and manageability.
5.distributed file systems
Distributed file systems allow files to be shared across multiple computers even without other inter-process communication. There are three main naming schemes for distributed files: 1) mounting remote directories locally, 2) combining host name and local name, and 3) using a single global namespace. File caching schemes aim to reduce network traffic by storing recently accessed files in local memory. Key decisions for caching schemes include cache location (client/server memory or disk) and how/when modifications are propagated to servers.
Chapter 8 distributed file systems
This document provides an overview and summary of key concepts related to distributed file systems. It begins with an introduction to file systems and their properties. It then discusses the Sun Network File System (NFS), including its architecture, operations, optimizations like caching, and how it achieves various requirements like transparency and performance. The document concludes with a brief overview of recent advances in file services beyond NFS.
Linux Cheat Sheet.pdf
This document provides a cheat sheet of common Linux commands and their usage. It covers basic file operations like copying, moving, deleting files and directories. It also includes commands for viewing files, compressing/decompressing files, finding files, remote access, and getting system information. The commands are explained over 3 pages with examples of proper syntax and usage for each one.
Server configuration
The document discusses File Transfer Protocol (FTP), Network File System (NFS), and Samba server configuration. It provides details on FTP such as its history, components, modes, and how to configure an FTP server in Linux. It describes NFS including its history, versions, configuration files, and steps to configure NFS client and server. It also explains Samba, its components, purpose, and how to configure a Samba server using both command line and graphical tools.
NFS is an excellent way of sharing files between linux and other unix systems
NFS is an excellent way of sharing files between linux and other unix systems explained by linux training in Chandigarh, CBItss Technologies
What Is DFS In Windows Server 2016 2.pdf
Distributed File System (DFS) is a file system that allows sharing of files across multiple servers. It provides greater storage capacity and bandwidth than a standard file system. DFS can be configured in Windows Server 2016 by opening Server Manager, clicking Manage, then Features and Roles. This allows selecting the DFS role and configuring file sharing across multiple servers.
Case Study - SUN NFS
The document discusses the Sun Network Filesystem (NFS) architecture. NFS provides transparent remote access to filesystems across operating systems and machine architectures using remote procedure calls. It has design goals of machine and OS independence, crash recovery, and transparent access. The Virtual File System interface defines filesystem operations. NFS uses a stateless server model that authenticates users on each request to check access permissions. Pathname translation is done iteratively on the client side.
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Tier 2 net app baseline design standard revised nov 2011
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The prophet's wives
The document discusses reasons why the Prophet Muhammad had multiple wives. It states that he had 12 wives total, with 10 being with him when he passed away. It argues that lust was not the reason, pointing out that he married his first wife Khadijah at age 25 and stayed with her alone for 25 years until her death when he was 52. It says the marriages were for political, social and religious reasons like spreading Islamic culture, strengthening bonds with companions, and having ties with other nations.
God is Great
This document takes the reader on a trip through scales of size from micro to macro, jumping distances by factors of 10. It starts at 1 meter and increases the scale up to 10 million light years, observing different objects that come into view like planets, galaxies, and nebulae. It then returns back down to the micro scale, decreasing distances by factors of 10 until it reaches the scale of femtometers, observing subatomic particles. The document emphasizes the constancy of natural laws across all scales and encourages contemplating humanity's place in the vast universe.
Aayat ul qursi
This document discusses the benefits of reciting Aayathul Qursi. It states that reciting it when leaving the house will result in 70,000 angels protecting from all sides. Reciting it 40 times daily at sunset earns the reward of 40 Hajj pilgrimages. Reciting it before bed will result in an angel guarding the person until morning. Reciting it after returning home and after ablution increases a person's rank with every word. Sharing it with others also provides reward from God.
Indiansoldiers
Indian soldiers who were wounded fighting in World War 1 on the Western Front were sent to England for treatment. Many towns on the south coast of England, including Brighton, Bournemouth, Brockenhurst and New Milton helped care for the large numbers of wounded Indian soldiers. It is estimated that over 64,000 Indian soldiers died or went missing and more than 65,000 were wounded by the end of the war.
2ªwwii how did it fought
World War II involved major battles in the European Theater between November 1942 and May 1945. Allied forces led by generals Montgomery, Clark, Alexander, Patton, Bradley, and Devers fought against Axis forces in campaigns across Western, Central, and Eastern areas of engagement. Through coordinated operations between multiple army groups consisting of airborne, armored, and infantry divisions, the Allies were ultimately able to defeat Nazi Germany.
Fun with EMC2
1) A liter of water contains enough mass to produce 9 x 1016 Joules of energy if converted entirely, which could power a 1 Watt lightbulb for around 3 billion years.
2) The sun produces its energy through nuclear fusion, where hydrogen nuclei fuse into helium. A little bit of mass is lost in this process, appearing as energy according to E=mc2.
3) Scientists are trying to create controlled nuclear fusion on Earth for a sustainable energy source, but it requires maintaining temperatures over 15 million degrees, which is technically challenging.
Discover the discovery
This document provides a high-level overview of the shuttle processing steps before flight, including:
1) The external tank arrives by barge and is moved to the Vertical Assembly Building (VAB) for preparation.
2) Solid rocket boosters and shuttle engines are attached to the external tank in the VAB.
3) The shuttle is then lifted and attached to the external tank.
4) The payload is prepared separately in the Payload Preparation Room and then transported to the launch pad for insertion into the shuttle.
Solaris servers sec
This document provides guidance on securing Solaris servers through hardening and configuration best practices. It recommends removing unnecessary software and services, enabling detailed system logging, installing the latest security patches regularly, and configuring services like sendmail securely based on checklists from SANS and CIS. Key steps include a minimal OS installation, removing unneeded packages and services, setting secure permissions and logging levels, and installing tools like Tripwire and SSH.
The OSI - seven layers
The document discusses the benefits of meditation for reducing stress and anxiety. Regular meditation practice can help calm the mind and body by lowering heart rate and blood pressure. Studies have shown that meditating for just 10-20 minutes per day can have significant positive impacts on both mental and physical health.
Chapter16 - the internet and its tools
The document provides a history of the internet and explains how it works and some common tools used on it. It began as a US military network called ARPANET and later expanded. The Domain Name System translates website names to IP addresses. Web browsers allow viewing web pages while email and listservs allow communication. Search engines and portals help users find information and HTML defines webpage formatting.
Chapter14 -- networking security
This document summarizes security risks and mitigation techniques for computer networks. It discusses risks associated with people, transmission, hardware, protocols, software, and internet access. It also outlines the goals of an effective security policy and describes physical security, firewalls, proxy servers, remote access, network operating system security, encryption, and wireless security. Key risks include social engineering, unauthorized access, transmission interception, insecure protocols, denial-of-service attacks, and improper firewall/remote access configurations. The chapter recommends conducting security audits, restricting physical access, using firewalls/proxy servers for access control, enforcing secure authentication/access, and encrypting sensitive data and wireless transmissions.
Chapter12 -- troubleshooting networking problems
The document discusses a methodology for effectively troubleshooting networking problems which includes identifying symptoms, determining the scope of the problem, establishing what has changed, selecting the most probable cause, verifying physical and logical connectivity, recognizing potential solution effects, implementing and testing a solution, and documenting the problem and resolution. It also discusses various software and hardware tools that can be used to diagnose networking issues, including cable testers, network monitors, protocol analyzers, and wireless network testing tools.
Chapter11 -- networking with tcpip and the internet
This chapter discusses TCP/IP network design including subnetting, CIDR, and NAT. It describes protocols for email delivery and access like SMTP, POP, and IMAP. It also explains using TCP/IP networks for voice transmission (VoIP) and provides details on TCP/IP utilities like netstat, nslookup, traceroute, and ifconfig that can be used for network discovery and troubleshooting.
Chapter10 -- netware-based networking
The document discusses NetWare, a network operating system developed by Novell. It provides an overview of NetWare's history and versions. The key advantages of NetWare include centralized management, support for multiple protocols, and integration with other network operating systems. The document also describes planning and installing a NetWare server, including hardware requirements, the installation process, establishing user accounts and groups, and providing client access and interoperability with other operating systems.
Chapter09 -- networking with unix and linux
This chapter discusses the history and varieties of UNIX and Linux operating systems. It describes how to install Linux, configure users and permissions, and interconnect Linux with other network operating systems using tools like Samba, WINE, VMware and Telnet. The chapter also provides examples of basic Linux commands and how to set up a Linux server with the required hardware specifications.
Chapter08 -- network operating systems and windows server 2003-based networking
This chapter discusses network operating systems and Windows Server 2003. It covers the functions of a network OS like managing resources and users. Windows Server 2003 editions are examined along with installation requirements. Features like Active Directory, file systems, and integration with other OSs are described. The chapter concludes with instructions for a basic Windows Server 2003 installation and configuration of users and groups.
Chapter07 -- wa ns and remote connectivity
The document discusses wide area networks (WANs) and remote connectivity. It defines WANs and their essential components. It describes various WAN topologies including bus, ring, star, mesh and tiered. It also discusses several WAN transmission methods like PSTN, ISDN, T-carriers, DSL, cable, and SONET. The document concludes with an overview of remote connectivity options like dial-up networking, remote control, terminal services, web portals and virtual private networks.
Chapter06 -- topologies and access methods
This document provides an overview of network topologies and access methods. It describes physical topologies like bus, ring, and star, as well as hybrid topologies like star-wired ring and star-wired bus. It also covers backbone structures, switching methods, Ethernet, Token Ring, FDDI, ATM, and wireless networking standards like 802.11a, 802.11b, and 802.11g. Key aspects like frames, association, and quality of service are discussed for different network types.
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Ch18 system administration
- 1. Network File Sharing Chapter 18