Chapter 11. Advanced Copy Services 549
Bridgeworks SANSlide technology, which is integrated into the IBM Spectrum Virtualize 
Software, uses artificial intelligence to help optimize network bandwidth use and adapt to 
changing workload and network conditions. 
This technology can improve remote mirroring network bandwidth usage up to three times. 
Improved bandwidth usage can enable clients to deploy a less costly network infrastructure, 
or speed up remote replication cycles to enhance disaster recovery effectiveness.
With an Ethernet network data flow, the data transfer can slow down over time. This condition 
occurs because of the latency that is caused by waiting for the acknowledgment of each set of 
packets that is sent. The next packet set cannot be sent until the previous packet is 
acknowledged, as shown in Figure 11-95.
Figure 11-95   Typical Ethernet network data flow
However, by using the embedded IP replication, this behavior can be eliminated with the 
enhanced parallelism of the data flow by using multiple virtual connections (VC) that share IP 
links and addresses. The artificial intelligence engine can dynamically adjust the number of 
VCs, receive window size, and packet size to maintain optimum performance. While the 
engine is waiting for one VC’s ACK, it sends more packets across other VCs. If packets are 
lost from any VC, data is automatically retransmitted, as shown in Figure 11-96.
Figure 11-96   Optimized network data flow by using Bridgeworks SANSlide technology
For more information about this technology, see IBM Storwize V7000 and SANSlide 
Implementation, REDP-5023.