Pdf introductionsan overviewsan technologies and solutionsother storage. Nfs tutorial in linux a nas is nothing but a deviceequipmetserver attached to tcpip network, that shares its own storage with others. Vmware contents vmware san system design and deployment guide iii table of contents. Sans are primarily used to enhance accessibility of storage devices, such as disk arrays and tape libraries, to servers so that the devices appear to the operating system as locallyattached devices.
Storage area network san a storage area network san is a storage that can cater to multiple networks allowing you to consolidate vast amounts of data from different networks across dif ferent locations and yet maintain them in one consolidated, indexed and secured fashion. Sans are typically composed of hosts, switches, storage elements, and storage devices that are interconnected using a variety of technologies, topologies, and protocols. A storage area network san is a specialized, highspeed network that provides blocklevel network access to storage. The storage devices can be connected directly to the server, or connected through a local area network lan or a storage area network san. Here storage area network san come into picture which is basically a combination of computers and storage devices connected in a network. This chapter identifies characteristics, architectural concepts, technologies, applications, and marketplace of storage area networks sans. A sans architecture works in a way that makes all storage devices available to all servers on a lan or wan. Differences and use cases enterprise storage forum. Storage area network as a networked highspeed enterprise infrastructure. A san can be connected directly to a few servers, however the most common setup is to connect a san cabinet to a san fibre switch, and connect the san switch to many servers, forming a fabric. This course focuses on the planning and implementation considerations associated with. Both these services run on a fibre optic network dedicated to the customer. In the following sections, we introduce some basic fibre channel concepts. The need for fulltime data access, as well as the sharing of storage and data by multiple applications, has given rise to a completely new data storage paradigm the.
Storage area networks and networkattached storage provide networked storage solutions. Some people also use the phrase storage networking in reference to network attached storage nas devices. Introducing basic network concepts 3 basetech networking concepts team 2230894 blind folio 3 figure 1. A san does not provide file abstraction, only blocklevel operations. Ip addresses are 32 bit long, hierarchical addressing scheme. Networkattached storage nas is basically a lanattached file server that. A san or storage area network is on its most basic setup a storage cabinet with fibre adapters or hbas host bus adapters that support fc connections.
Pdf this chapter identifies characteristics, architectural concepts, technologies. Network attached storage nas is basically a lan attached file server that. Ethernet media using an io protocol called iscsi is. Storage data store is separated from the processors and separated processing. It seems that everywhere you turn these days, you hear someone talking about storage area network san storage. Mar 31, 2011 a storage area network is a highspeed sub network of shared storage devices. This course is designed for technical professionals, engineers seeking an accelerated learning path that includes both conceptual knowledge of fibre channel san technologies, ip storage, iscsi, and 10 gige and handson experience in heterogeneous san environments. Network attached storage nas is basically a lanattached file server that.
Storage area networking fundamentals global knowledge. There are many network storage technologies available to enable the movement of data storage boxes outside the cpu system box. Storage administrators and managers must now be conversant in networking concepts and consequences such as addressing. San storage area network is a specialized highspeed network that connects computer systems, or host servers, to high performance storage subsystems. File io is represented by a file with file name and some offset. Storage area network essentials electronic commerce has made traditional data storage methods obsolete. You can also read the files using the rest interface or the storage client libraries. Servers identify the san as locally attached storage, so multiple servers can share a storage pool. A shareddisk file system uses a storage area network san to allow multiple computers to gain direct disk access at the block level. With a clientserver network, one or more servers will perform critical functions on behalf of the other machines the clients on the network. As more storage devices are added to a san, they too will be accessible from any server in the larger network. If you dig a little deeper, when a file readwrite request is send to a nas share attached to a server, the request is sent in the form of a cifscommon internet file system or nfsnetwork file system requests over the network. The paper will then develop the concepts in a more structured manner.
This chapter introduces the concept of a storage area network, which has been. Introduction to storage area networks july 2006 international technical support organization sg24547003. Data storage storage area networks for dummies cheat sheet learning about and using storage area networks sans will go more smoothly if you study this handy chart of acronyms used for phrases describing storage area network parts, people, and processes. Understanding storage area networks p having a separate ethernet for the private metadata network, though not absolutely required, is highly recommended, and the separation of network traffic between the san and a public network could greatly enhance the performance of the san in highbandwidth environments. Introduction to azure storage cloud storage on azure. Ppt storage area network san powerpoint presentation. Network layerprovides the same functionality as the physical, the data link and network layers in the osi model. This course focuses on the planning and implementation considerations associated with establishing that san infrastructure. We provide the best quality service and design solutions while reducing storage costs for our clients.
Storage area networks and green data centers chapter 12. Sticky august 4, 2017 uncategorized kmitit4yr2semsanmaterial. Internal fit inside a desktop computer, laptop, disk array enclosure, or. Access control and translation from filelevel operations that applications use to blocklevel operations used by the san must take place on the client node. That means that multiple vms can share the same files with both read and write access.
The need for fulltime data access, as well as the sharing of storage and data by multiple applications, has given rise to a completely new data storage paradigm the storage area network san. Introduction to storage area networks ibm redbooks. A nas is a single storage device that operates on data files, while a. A storage area network san or storage network is a computer network which provides access. Networkattached storage nas is a type of dedicated file storage device that provides localarea network local area network lan nodes with filebased shared storage through a. By allowing data to be replicated to other san devices across. San training storage area networking training tonex training.
A storage area network san or storage network is a computer network which provides access to consolidated, blocklevel data storage. The first of these is called colt sanlink and is costeffective between two sites. Because all data storage was located inside each individual server, you had no effective way to efficiently allocate storage space between all the servers. Storage managers, storage administrators, administrators for san, backuprecovery, and disaster recovery. Azure files enables you to set up highly available network file shares that can be accessed by using the standard server message block smb protocol. Area network san, the metrics used to describe the severity of each type of congestion for both connectrix bseries and the mdsseries as well as preventive measures that can be taken to avoid the effects of congestion spreading. A storagearea network san is a dedicated highspeed network or subnetwork that interconnects and presents shared pools of storage devices to multiple servers. Storage area network as a service for cloud computing chapter 7. Sans are not dependent on the lan and relieves pressure on the local network by offloading data directly from attached servers. Storage area network san implementation in simple words san is a highspeed, dedicated network of servers and shared storage devices and provides access to consolidated, block level data storage. Pdf storage area network fundamentals researchgate. Storage area network as a networked highspeed enterprise infrastructure nt. Jul 25, 2015 a san or storage area network is on its most basic setup a storage cabinet with fibre adapters or hbas host bus adapters that support fc connections.
Introduction to storage area network, san ravi kumar khattar, mark s. The san meets todays need to store enormous amounts of data and deliver that data at tremendous speed without failure. A storage area network san is a dedicated highspeed network or subnetwork that interconnects and presents shared pools of storage devices to multiple servers. Sure, users could share files over a lan, but you still needed a way to share access to the physical disks in every server. Similar to a file server, a nas array is a standalone device that connects to a network and provides filelevel storage that can be accessed by end users. What is storage area network san storage tutorials. Do you want to setup a test setup to learn san you can try say openfiler as a virtual server but you need to specify some more information like are you going to use iscsi or nfs or fibre channel if you go down the virtual setup you can only use iscsi or nfs not fcoe as iscsi and nfs just use ethernet whereas fcoe uses a hba that there is no virtual hba. The most common type of clustered file system, the. Sg24547000 international technical support organization. The storage area network san infrastructure facilitates storage consolidation, data sharing, server clustering, lanfree and serverless backup across heterogeneous host server platforms. Introduction to storage area networks semantic scholar. Storage area network concept solutions experts exchange. Today, most sans use fibre channel media, providing an anytoany connection for processors and storage on that network. A storage array is a collection of both physical components and logical components.
It focuses on the techniques and the technologies that have evolved around slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Network attached storage nas is a type of dedicated file storage device that provides local area network local area network lan nodes with filebased shared storage through a standard ethernet connection. Apr, 2020 storage area networks and networkattached storage provide networked storage solutions. Ip is a standard that defines the manner in which the network layers of two hosts interact. San vs nas difference between a storage area network and. Storage area networking san, has emerged to provide an architectural. The network file system nfs is a file transfer protocol that allows a user to access files on a remote server at a speed comparable to local file access, regardless of the users operating. The storage area network san is the newest concept and technology for providing fast and reliable mass storage. Storage managers, storage administrators, administrators for san, backuprecovery, and disaster recovery storage. That is, one network can be connected to another network and become a more powerful tool because of the greater resources. If you dig a little deeper, when a file readwrite request is send to a nas share attached to a server, the request is sent in the form of a cifscommon internet file system or nfs network file system requests over the network.
Ethernet media using an io protocol called iscsi is emerging in 2001. Storage area network san a storage area network san is a specialized, dedicated high speed network joining servers and storage, including disks, disk arrays, tapes, etc. High capacity, high availability, high scalability, ease of configuration, ease of. Mapping between ip addresses and network physical addresses. A nas is a single storage device that operates on data files, while a san is a local network of several devices. These functions might include user authentication, data storage, and the running of large, shared, resourceintensive applications such as databases and client relationship management crm software. A san, or storage area network, is a dedicated network that is separate from lans and wans. The san components include host bus adapters hbas in the host servers, switches that help route storage traffic, cables, storage processors sps, and storage disk arrays. Computer concepts test 1 thomas flashcards quizlet. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Client nodes a client node can be a workstation, a personal computer, a file server, or even another tivoli storage manager server. See our comprehensive guide on storage area networks in the enterprise.
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