Internet Small Computer System Interface (iSCSI) PPT PDF Paper Presentation & Seminar
Internet Small Computer System Interface iSCSI Paper Presentation & Seminar
The SCSI protocols widely used to access storage devices. The iSCSI protocol is a transport for SCSI over TCP/IP. SM-2 defines an architecture model for SCSI transports, and iSCSI defines such a transport on top of TCP/IP. Other SCSI transports include SCSI Serial and Fibre Channel Protocol (FCP). Until recently standard networking hardware (Ethernet) and IP-based protocols could not provide the necessary high bandwidth and low latency needed for storage access. With the recent advances in Ethernet technology, it is now practical from a performance perspective to access storage devices over an IP network. 1Gb Ethernet is now widely available and is competitive with current 1 and 2 Gb Fibre Channel technology. 10Gb Ethernet will soon also be widely available. Similar to FCP, iSCSI allows storage to be accessed over a storage area network (SAN), allowing shared access to storage. A major advantage of iSCSI over FCP is that iSCSI can run over standard off-the-shelf network components, such as Ethernet.
Furthermore, iSCSI can exploit IP-based protocols such as IPSec, for security and Service Location Protocol (SLP) for discovery. A network that incorporates iSCSI SANs need use only a single kind of network infrastructure (Ethernet) for both data and storage traffic, whereas use of FCP requires a separate kind of infrastructure (Fibre Channel) for storage (Fig.2). IP based SANs using iSCSI can be managed using existing and familiar IP-based tools such as Simple Network Management Protocol (SNMP) whereas FCI SANs require specialized management infrastructure. Furthermore, iSCSI-based SANs can extend over arbitrary distances, just like TCP, and are not subject to distance limitations that currently limit FCP.
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