Access "DWDM a Boon for the Few"
This article is part of the Vol. 3 No. 2 April 2004 issue of Storage managers give thumbs up to IP storage
Is dense wavelength division multiplexing (DWDM) a success or a failure as a transport for synchronous data replication applications? It depends on who you talk to. According to Todd Bundy, director of business development and alliances for ADVA Optical Networks, at least in the metro, DWDM is popular among customers that used to rely on ESCON channel extension to run data mirroring applications such as IBM's Geographically Dispersed Parallel Sysplex (GDPS). GDPS mirrors and load balances zSeries data across remote locations. But Jim Morin, vice president of strategic planning at CNT, says DWDM has failed to take off the way he thought it might. "Three years ago, I was much more bullish on optical because it offers so much more bandwidth," he says. "With an optical DWDM solution, you can get 2Gb/s bandwidth with a single wavelength," he explains. With SONET, the same bandwidth requires an OC-48, which "costs an arm and a leg." CNT, which resells ADVA DWDM equipment, says it sees about 50% of its sales going into Metropolitan Ethernet installations vs. 25% ... Access >>>
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