Network Configuration and Topology
StorNext File System Tuning
The Distributed LAN (Disk Proxy) Networks
is set to
In some cases, TCP offload seems to cause problems with Distributed LAN by miscalculating checksums under heavy loads. This is indicated by bad segments indicated in the output of netstat
The internal bus bandwidth of a Distributed LAN client or server can also place a limit on performance. A basic PCI- or
Similarly, the performance characteristics of NICs can vary widely and ultimately limit the performance of Distributed LAN. For example, some NICs might be able to transmit or receive each packet at Gigabit speeds, but not be able to sustain the maximum needed packet rate. An inexpensive
It can be useful to use a tool like netperf to help verify the performance characteristics of each Distributed LAN network. (When using netperf, on a system with multiple NICs, take care to specify the right IP addresses in order to ensure the network being tested is the one you will be running Distributed LAN over. For example, if netperf
For maximum throughput, SNFS distributed LAN can utilize multiple NICs on both clients and servers. In order to take advantage of this feature, each of the NICs on a given host must be on a different IP subnetwork. (This is a requirement of TCP/IP routing, not of SNFS - TCP/IP can't utilize multiple NICs on the same subnetwork.) An example of this is shown in the following illustration.
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