HP StorageWorks 2/140 FW 08.01.00 McDATA Products in a SAN Environment Plannin - Page 189
SONET and SDH, bandwidth, medium-latency applications with short-to-long RTO
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Implementing SAN Internetworking Solutions 4 Figure 4-12 SAN Extension Technology Comparison • WDM - This technology supports high-bandwidth, low-latency applications with short RTO and RPO requirements. Applications include peer-to-peer computer clustering (grid computing) and real-time disk mirroring (RDR/S or RDR/A operational mode) over short to medium metropolitan distances. WDM scales to higher bandwidths at a lower relative cost than SONET or SDH. Unless one or more SAN routers are included in the extended-distance link (native FCP only), the technology is vulnerable to disruptions caused by fabric or link problems. • SONET and SDH - These technologies support mediumbandwidth, medium-latency applications with short-to-long RTO and RPO requirements. Applications include asynchronous disk backup or tape vaulting over metropolitan to extended (intercity) distances. Unless one or more SAN routers are included in the extended-distance link (native FCP or iFCP), the technology is vulnerable to disruptions caused by fabric or link problems. Implementing SAN Internetworking Solutions 4-47
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