By David Spark  |  Posted 2004-10-25 Print this article Print

Volume Replicator became a wake-up call for the SAN market.

"Veritas introduced a novel approach to data replication that commanded the attention of a lot of people who thought storage-based replication was the only way to go," said Harvey Hindin, an analyst at D.H. Brown Associates Inc., of Port Chester, N.Y.

After evaluating copying data via FTP and SAN solutions, Banco Santander chose Volume Replicator because the application-based technology allowed the bank to capitalize on its existing infrastructure.

Bandwidth is a major issue for replication applications. Since Volume Replicator required minimum throughput of 512K bps and Banco Santander had a T-1 line transmitting 1.5M bps, the bank was in the clear, but not for long.
After it purchased Volume Replicator, all kinds of traffic—much of it unrelated to financial transactions, such as e-mail and NetBIOS—began growing and affecting replication. The traffic load became so problematic that Banco Santanders replication fell out of sync by two weeks.

Purchasing another T-1 line would have cost $60,000 per year, plus another $50,000 to $75,000 for hardware upgrades, making it unviable. Eugene Rivera, Banco Santanders technical support manager, tried to configure the banks Cisco Systems Inc. routers to give top priority to replication traffic, but that didnt work.

Banco Santander found that transmitting the same amount of data it backed up to tape—40GB—over the WAN, along with all the other traffic, became quite a challenge.

Help came from a sequence-caching solution offered by Peribit Networks Inc. Veritas helped Banco Santander optimize WAN traffic using Peribits Molecular Sequence Reduction and Network Sequence Mirroring technologies. A third Peribit technology, Packet Flow Acceleration, sits at either end of the TCP connection and manages traffic flow to improve transmission. Using Peribits tool for analyzing the WAN, Banco Santander saw that it could convert its existing T-1 and increase throughput to equal 12 T-1s.

"When we saw that, we knew thats what we need to get in here," Rivera said.

David Spark is a free-lance writer and can be contacted at

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