Data Protection
Remote Mirroring
Performance Impacts
• Performance may be affected by:
– Network technology
– Quality of Service
– Long distances (increased latency)
–Frame size
– FC Buffer credits
The performance may be affected by the network technology.
If it’s over IP it’s a higher latency.
If it’s over optical, it’s a fixed latency.
Quality of Service – are we going to be queued up behind lots of little
messaging systems, so we need to make sure we’ve got a Quality of Service
set.
Distance affects round trip time which affects latency. The further we go the
longer it takes.
Frame size – especially if we’re going over IP extended circuits. We want to
avoid segmentation and reassembly.
If we’re optical extension the frame size is irrelevant but then the buffer credits
become relevant because we need to make sure we can saturate the link.