Tag: modeling

How scalable is my Nutanix cluster really?
By: Date: November 20, 2018 Categories: Nutanix Tags: ,

In a previous post I showed a chart which plots concurrency [X-axis] against throughput (IOPS) on the Y-Axis.  Here is that plot again: Experienced performance chart ogglers will notice the familiar pattern of Littles Law, whereby throughput (X) rises quickly as concurrency (N) is increased.  As we follow the chart to the right, the slope flattens…

Read More →
Working with fio “distribution /pereto” parameter
By: Date: November 12, 2018 Categories: Nutanix,X-Ray Tags: ,

The fio Pareto parameter allows us to create a workload, which references a very large dataset, but specify a hotspot for the access pattern.  Here’s an example using the same setup as the ILM experiment, but using a Pareto value of 0:8.  My fio file looks like this.. [global] ioengine=libaio direct=1 time_based norandommap random_distribution=pareto:0.8 The…

Read More →