Friday, October 8, 2010

sFlowTrend adds server performance monitoring

The latest release of the free sFlowTrend application adds support for sFlow Host Structures, integrating network and server monitoring in a single tool.

Note: The open source Host sFlow agent provides an easy way to add sFlow host monitoring to your servers (see Host sFlow 1.0 released).

The above screen capture shows the new sFlowTrend Host statistics tab which displays physical and virtual server summary statistics (see Top Servers). The relationship between physical and virtual hosts is clearly displayed, the virtual machines are show as nested within the physical host.

Clicking on a physical host brings up a detailed trend of performance on the physical host (see below):

Similarly, clicking on a virtual host displays virtual server statistics (see below):

However, visibility isn't limited to traditional server performance statistics. Since the sFlow standard is widely supported by switch vendors, we can also look at the network traffic associated with the hosts (see Hybrid server monitoring).

In this case we can even use sFlow to look inside a server and see the traffic between virtual machines since the hypervisor contains the Open vSwitch. The top connections through the virtual switch are shown below:

Have you every wondered what happens to the network traffic when you migrate a virtual machine? The following chart shows the spike in network traffic that occurs during a virtual machine migration (clearly something to be aware of when provisioning network capacity):

An integrated view of network and server performance is critical for managing servers, storage and networking in converged environments (see Convergence).

Download a copy of sFlowTrend to try out sFlow monitoring of your switches and servers.

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