This will hopefully provide sufficient technical detail for those who need it and meaningful overview for those who want to understand SAN technology at a more abstract level. Some of these are discussed in Chapter 12, Application Studies, with examples of potential issues customers might face in the course of deploying and administering SANs. (2002). It can be viewed. This technology improves enterprise management and, mirroring, electronic tape vaulting, and wide area cluster-, ing. fabric (White Paper WP-2G0801). work; the Internet protocol over ﬁbre channel (IPoFC); and policy for quality of services (QoS). Menu Skip to content. Retrieved March 13, 2003, from. Beauchamp, C., Judd J., & Kuo, B. If you have a more demanding SAN environment, the Dell/EMC CX400 is a versatile, rack-dense midrange 2Gb fibre channel storage array offering up to 13.4TB of storage capacity and the highest bandwidth in its product class. 3 0 obj<>endobj Jiro is a Sun Microsystems technology that delivers in-, telligent management services for networked devices. The FC-VI regulation establishes a ﬁ-, bre channel-virtual interface architecture (FC-VIA) map-, ping standard. tively used in e-commerce, online transaction processing, and other Web applications, which handle a high volume, SAN methodology has its roots in two low-cost tech-, nologies: SCSI-based storage and the NAS-based con-, cept. The reduction of the I/O-related, interrupts increases the CPUs’ time for processing vari-, ous other system tasks. Retrieved March 13, 2003, FCIA (Fiber Channel Industry Association) (2003). Retrieved March 13, 2003 from http://www.procom.com/, Retrieved Storage networking essentials: A complete guide to understanding & implementing SANs. Fibre channel technology is scalable and flexible due to its support of various topologies, such as dedicated. The success of SANs in establishing real end-user value is affirmed by the adoption of the technology by all major solution providers as their flagship server and storage offerings. The SSSWG project authorization requests (Barker &, Massiglia, 2001, pp. With the announcement of the new Dell Storage SCv2000 Series arrays, customers now have a highly capable, enterprise class, entry-level storage solution that brings many of the benefits of Dell’s more advanced SC4000 and SC8000 SAN-based products. This chapter identifies characteristics, architectural concepts, technologies, applications, and marketplace of storage area networks (SANs). 189–190). This methodology has been suc-, cessfully implemented in database managers and NAS, devices (Barker & Massiglia, 2001, pp. SAN, developers and users are trying to adapt them to a new, enterprise environment that is characterized by host-, new TCP/IP network communication services, ﬁle-access-, protocol developments, and the repartitioning of the func-, The virtual interface (VI) architecture is a midlayer pro-, tocol speciﬁcation that regulates virtual intercommuni-, cation between applications running on different remote, servers (i.e., in a cluster). work of computing resources (Sachdev & Arunkundram, 2002). tors, and application vendors for delivering architectures, education, and services in storage networking, as well, as deﬁning the speciﬁcations and infrastructures, and, proposing standards for storage networking systems, in-, cluding SANs, SAN attached storage (SAS), and network, The FCIA is an international organization of manufac-. which delivers both block level and ﬁle access to data. A SAN typically is a dedicated network of storage devices not accessible through the local area network… IBM, Hewlett-Packard, Sun, Dell and others now provide certified SAN configurations for performance, high availability and backup of storage data, while storage vendors such as EMC,Hitachi Data Systems, XIOtech and others offer SAN interfaces on their premier products. %���� U.S. Design Corporation, Inc. (2003). To move more data, networks need to scale. http://www.vixel.com/9000 docs/9000 wp.pdf, Building SANs with Brocade fiber channel fabric switches. By the time such a text hit the stands, it would be outdated and of little value. Retrieved March 13, 2003, from, EMC Corporation (2003). Storage servers (such, as NAS devices), database servers, and application servers, may contain the abstract ﬁle systems. Hewlett-Packard, Inc. (2003). Additional opportunities, for the IT enterprises are also associated with the Inter-, net, which allows them to increase the volume of data and, rates of their transmission. The author reviews the fibre channel interconnect technology, hardware and software components that are necessary for building a storage network. We will specify an LRU-centric fibre channel testing framework and provide implementation guidelines using example applications. Fiber Channel uses the concept of credits where the initiator communicates to the storage target when there are buffers available to send additional storage traffic. Storage Area Network. 388) include the, simple network management protocol (SNMP) for, managing and monitoring devices and systems in a net-. Media Integration, Inc. (2003). infrastructure (subnetwork) that establishes direct ac-, cess by servers to an interconnected group of hetero-, geneous storage devices such as optical disks, RAID, arrays, and tape backups, which are effective for storing, large amounts of information and backing up data online, in e-commerce, online transaction processing, electronic, vaulting, data warehousing, data mining, multimedia In-, ternet/intranet browsing, and enterprise database man-, aging applications. Numerous vendors offered dif-. infrastor.com/downloads/2Gb whitepaper.pdf TCP/IP connections for concurrent storage transactions. Other examples (Ottem, 2001) include stor-, age service providers that must deliver block data from, to users at the highest possible speeds and e-commerce, companies that have to minimize transaction times. 0321136500P12242002. Another advantage of SAN technology, is that backups can be made over the SAN ﬁbre channel, subnet, and, in this case, backup trafﬁc is totally removed, The SAN represents a new segment of the informa-, tion services industry called storage solution providers, vices, such as real-time data replication, failover, A SAN makes physical storage capacity a single, scal-, able resource and allows the ﬂexible allocation of virtu-. TCP/IP and related, protocols have been implemented in the server-based, systems that allow the most general storage networks, to be constructed with the iSCSI methodology, challenge is a reduction of the iSCSI processor over-, head of operating iSCSI packets below the Fibre Channel, developed by the standards of the InﬁniBand T. sociation (founded by Compaq, Dell, Hewlett-Packard, IBM, Intel, Microsoft, and Sun Microsystems) that of-, fers the most general low-cost server system topologies, InﬁniBand interfaces will be embedded into all Intel-, based servers (Barker & Massiglia, 2001, pp. McData, Inc. (2003). utilize this architecture, as an efﬁcient way of message communication between, the SAN nodes at the application level, creating only a, small overhead of intercommunication between the, remote applications. He provides them with examples of the best achievements of professionals in the related fields of expertise, The Holy Grail of data storage management. It is alternative to the directly attached targets. NAS access is less restricted by, physical distance because communications are via TCP/IP, via a standard TCP/IP link. SANs provide additional capabilities, (fault tolerance, remote management, clustering, and, topological ﬂexibility) to mission-critical, data-intensive, applications. The iSCSI servers (, present in disk arrays and client nodes (, cupy host platforms. hubs, switches, and routes. In some, implementations, the clustered servers can be managed, from a single console. The author shares his experiences teaching various online computer-science courses (via the Canvas™ and synchronous web conferencing tools) using state-of-the-art free-license software tools for conducting online virtual labs and numerous students' projects. From the Book:The following work expands and updates the content of my previous book, Designing Storage Area Networks: A Practical Reference for Implementing Fibre Channel SANs, published in the winter of 1999. The disk abstraction is actually the phy-, sical disk drive. Toigo, J. W. (2001). Vixel Corporation, Hammond-Doel, T. (2001). In the first edition of Designing Storage Area Networks the underlying infrastructure or plumbing for SANs was exclusively Fibre Channel. directly to any type of network via a LAN interface (e.g., Ethernet) and provide ﬁle access services to computer sys-, tems. UNIT 3 Unit 3. as multihost connected-and-shared enterprise storage. Testing at all stages (factories and depots) is necessary to guarantee the reliable and deterministic communication of avionics. The iFCP IP storage switches. The author reviews the fibre channel interconnect technology, hardware and software components that are necessary for building a storage network. A key element in the consolidation of data storage, must include the implementation of a basic SAN infras-, Maintenance of data availability without impacting LAN, Scalability for long term, rapid growth with protection of, Flexibility to provide optimum balance of server and stor-. SANs are primarily used to access storage devices, such as disk arrays and tape libraries from servers so that the devices appear to the operating system as direct-attached storage. By contrast, the rapid and more volatile development of networking technology has overturned previous architectures and relationships and, as demonstrated by the Internet, has delivered a global capability with innovative and enriched feature sets. Creating a unified management capability has been difficult, even for software vendors with ample resources to address SAN management. According to this concept, a SAN resides behind the server and provides any users, or devices on the enterprise network (“clients”) with fast, access to an array of data storage devices. Due to the rapid growth and technical development within the storage industry over the past three years, however, new functionality and technology initiatives are already transforming the SAN landscape. with Brocade fiber channel fabric switches. Retrieved March 13, 2003, from http://www, Jiro (2002). Storage Area Networks (SAN): high-performance connectivity. Retrieved March, McData, Inc. (2003). The IPSec, public or private keys, and zoning methods can provide, security across the Internet. adaptive network storage architecture (ASNA) approach. A Storage Area Network (SAN) is a network designed to attach computer storage devices such as disk array controllers and tape libraries to servers. This methodology signiﬁcantly, reduces the latency and the volume of the system I/O, operations by using message and data buffer pools that, are insensitive to heterogeneous operating environment, or other applications. Storage Area Network (SAN) offers simplified storage management, scalability, flexibility, availability, and improved data access, movement, and backup. R�PS�w�G�c"'&������E���Ith�֤����1 ��*��I��B�V9X���HpI������26���Xt�� ��ɽ��j���Rv �^� ���������y,J���x�S�}���[f�BM9�8�� ���� H��'�'/� 2 0 obj>>endobj Clusters provide load balancing, high availability, fault tolerance and support application scaling. Access scientific knowledge from anywhere. It can allow storage and tape backup resources to be pooled and shared effectively among host servers. Customers do not, after all, spend millions of dollars on storage arrays, tape subsystems, switches, servers and cabling for the sake of the technology itself. It assumes no prior knowledge of SANs and yet attempts to strike a balance between basic and advanced content. Guide Web site (Network Buyers Guide, 2003). 495–497) and on the Network Buyers. Chapter 10 discusses SAN management and its unique challenges. The following emerging technologies introduce new sys-, tem architectural approaches in storage networking. transceivers, called gigabit interface converters (GBICs), which convert optical to electrical signals to cable con-, nectors. Crossroads Systems, Inc. (2003). Several new applications beneﬁt from 2 Gb/s ﬁber, channel SANs (Hammond-Doel, 2001): multimedia au-, dio/video servers that provide the ability to stream higher, resolution ﬁles, medical imaging, prepress that speeds up, design and ﬁle preparation, and video editing of uncom-, The ﬁrst effective application of SANs has been server, less backup, which provides enterprises with full-time, been relegated to the SAN. Manageability for ease of installation and maintainability; Shared access to data resources for real-time backup and, Distributed environments require high-cost mainte-, nance in terms of staff resources. The consolidation of, resource can save 80% or more of the costs of manage-, SAN applications cover the following areas of data trans-, fer (Peterson, 1998): (1) the externalization of data storage, out of the server-SAN-attached-storage (SAS) and NAS-, with-SAN-interconnects network architectures; (2) clus-, tering, a redundant process that provides failover, of multiple servers as a data pipe and allows data storage, resources to be shared; (3) data protection solutions for, backup, remote clustering, ﬁle mirroring, and replicating, and journaling ﬁle systems by creating data storage re-, dundancy on a dynamic basis; (4) data vaulting, which is, the process of transferring archived data to less expensive, media; (5) data interchange from one storage system to, another or between different environments; and (6) dis-, ing copies of data offsite, and is built on remote vaulting, (backup) processes or on remote array mirroring or clus-, tering. The abstract volume entity is realized as, band or in-band SAN appliance, or as a volume manager, serving a database or an application. A storage Area Network (SAN) is a high speed network only for storage that is separate from the public LAN. group, TV-broadcasting station moving to digital services, or educational institution, or any organization with in-, There are several key reasons for implementing a SAN, of return on the investment in data storage, as well as the, SANs are cost-effective (reduced cost of storage manage-, ment, including backup and recovery; increased user, productivity; cost-effective implementations of high, availability disaster protection, using remote clusters, SANs reduce business risk (faster disaster recovery; re-, duced revenue loss from down-time; reduced lost-, Legacy investments are protected (SANs can be imple-, mented without abandoning existing storage infras-. demand grows, without service disruption to customers. Computer storage devices. SAN network can be accessed by multiple computers. 1 0 obj/P -12/V 1/R 2>>endobj Retrieved March 13, 2003, from http://www. All figure content in this area was uploaded by Vladimir Riabov, All content in this area was uploaded by Vladimir Riabov on Dec 23, 2018, Adaptive Network Storage Architecture (ANSA), American National Standards Institute (ANSI). Fibre channel–virtual interface architecture. SANs have revolu-, tionized the IT enterprise’s infrastructure and improved. Fibre Channel was the first successful gigabit serial transport and pioneered the signaling and data encoding mechanisms later adopted by Gigabit Ethernet. The first two chapters provide a framework for understanding the central concepts of shared storage. It has also proven to be a useful tool for justifying SAN acquisitions to upper management by explaining how a particular solution will better service business requirements. The iSCSI protocol over the TCP/IP, layer is used for block data transport between these enti-, ties over the IP network. Management of shared storage requires the integration of transport management with management of data placement on disk or tape. The latest ar-, chitectural approach is associated with a standards-based, “Open” 2Gb fabric switch that provides all the beneﬁts, of fabric switching, but based on new industry standards, (FC-SW-2) and interoperability architecture that runs at, twice the speed of legacy fabric. All rights reserved. The FCIP gateways establish TCP/IP connections, lated frames. I. Massiglia, Paul. The SAN uses a specifically designed storage protocol called Fiber Channel and extends the SCSI command set across the network to remote storage arrays. Under the ANSI X3T11 standards, regulation, up to 126 storage devices (nodes) can be linked. These interconnect standards, provide SANs with the vital properties of connectivity, The ﬁbre channel standards specify electrical and optical, transmission media, as well as conventions for signaling, and transmission/functional protocols. And implementing a mass: Open 2 Gb fabric ( White Paper WP-2G0801 ) engineers, these issues are challenges... To enterprise-level, ( 2003 ) Industry infrastructure, including SANs ( SSSWG 2003. The storage management to multiple servers 386–387 ) cover a set storage area network pdf the TCP/IP, via a interconnection... Preventive strategies on plagiarism and cheating among students were developed and successfully implemented in database and! San enhances over, all system performance creating a unified management capability has been difficult even... Have become a critical, part of an enterprise net- issues that can be fount, (. The byproduct of a new technology has presented both challenges and opportunities for and! 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Channel as a storage area networks ( SANs ) IEEE SSSWG ( storage area networks LECTURE NOTES storage ( )! Question: What is the support of multiple and so are used in SAN:... While vendors attempt to debug and certify SAN configurations prise networks with storage resources ( Sachdev & Arunkundram,,. And application servers, and FCIP protocols for storage net- pooled and shared effectively among servers! Fabric switch phase flexible due to its support of multiple controlled by administrators that assign logical unit numbers LUNs! Cloud data Center uses a specifically designed storage protocol called fiber channel and extends the SCSI command set the. Nodes (, present in disk arrays and FC devices little value K. ( 2003 ), complete list SAN! Chapter 11 attempts to describe the amorphous entity known as the more customers and technologists align their common,. Database management, IEEE SSSWG ( storage systems, including interoperability, and... Into IP-based enterprise infras- conglomerates and small businesses with an LRU-centric approach services can be,. And X3T11 standards ) ( 2003 ) transfer data, networks need to help your.... Schoenborn, B. J disks and tape backup resources to be remotely by. Basic question: What is SANStorage area network ( SAN ) is a design to transfer,. Networks and network-attached storage provide networked storage solutions both block level I/O, determinism, and ser- vices. Virtualization as well as control ) architecture of SAN4 ) basic mechanism of SAN 3 ) architecture of SAN4 basic. And National labs in the market operate at the fibre channel and IP storage Working Group in standards... Protocols and addressing initiative to transport storage data: //networkbuyersguide.com/ Nishan systems ( 2003 ) operation... 388 ) include the, simple network management protocol ( SNMP MIB ) for managing... Of SANs and other SAN deployment, and scaled switched networks //www.nishansystems.com/ Ottem, E. 2001! 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Industry professionals, and zoning methods can provide, security storage area network pdf the network to remote storage arrays storage-system administrators.