Storage Wide Area Network:

Wide Area Network

WANs have evolved into global networks that tie remote offices to data centers, connect remote backup and disaster recovery sites, and even link customers and partners to shared corporate resources. in this guide you'll learn about WAN basics, WAN optimization, remote backup, WAFS and SAN connnections.

  • ISCSI and SAN interconnections

    SAN data has traditionally existed as its own "island" of Fibre Channel technology -- accessible only to applications through the data center. But the need to implement business continuity and disaster recovery plans has forced data centers to connect Fibre Channel SANs across the wide area network (WAN). The broad adoption of SoIP technologies, such as iSCSI, has further enhanced this connectivity. A storage manager creates an Ethernet storage fabric by using existing network hardware and tools to create an Ethernet storage fabric that can easily transfer iSCSI SAN data across TCP/IP-based networks, including the Internet. This chapter examines the basic schemes used to connect SANs over a distance.

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  • WAN-WAFS and remote offices

    Today, the Internet and dedicated wide area network (WAN) resources allow direct connections between the data center and remote offices. Remote offices can now access applications and data from the data center, and backup tasks can take place without the intervention of any remote employees. This chapter highlights the essential ideas of WAN in the remote office.

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  • Wide area network backup, archives and disaster recovery

    Backups, archives and disaster recovery serve different storage purposes, but all three disciplines have the same basic objective of data protection. This overview of WAN backups, archives and disaster recovery discusses efficiency for shorter RPOs, as well as remote storage and recoverability issues.

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  • Wide area network basics

    This tutorial covers the basics of WANs, which are used to connect two or more LANs.

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  • Wide area network mirroring and replication

    One of the easiest ways to protect vital data is to mirror (or copy) the data to a second location. If one copy fails, the second copy can be used. In many cases, data is mirrored locally in a storage array using a RAID 0 disk group, but this basic replication method does not offer any protection against disasters. This chapter of the WAN expansion guide focuses on remote mirroring and replication.

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  • Wide area network optimization and acceleration

    One of the major issues facing today's corporate data centers is growth. Companies are turning to WAN optimization and WAN acceleration technologies that improve bandwidth utilization by reducing the effective amount of data being transferred and alleviating the inefficiencies inherent in WANs. This chapter covers some common data reduction tactics.

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