Category: X-Ray

How to run vdbench benchmark on any HCI with X-Ray
By: Date: March 23, 2020 Categories: X-Ray Tags: ,

How to use Nutanix X-Ray to run any vdbench workload at scale Many storage performance testers are familiar with vdbench, and wish to use it to test Hyper-Converged (HCI) performance. To accurately performance test HCI you need to deploy workloads on all HCI nodes. However, deploying multiple VMs and coordinating vdbench can be tricky, so…

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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…

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X-Ray scenario to demonstrate Nutanix ILM behavior.
By: Date: October 25, 2018 Categories: X-Ray Tags: ,

Specifically a customer wanted to see how performance changes (and how quickly) as data moves from HDD to SSD automatically as data is accessed.  The access pattern is 100% random across the entire disk. In a hybrid Flash/HDD system – “cold” data (i.e. data that has not been accessed for a long time) is moved…

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HCI Performance testing made easy (Part 3)
By: Date: September 17, 2018 Categories: X-Ray Tags: , , , , ,

Creating a HCI benchmark to simulate multi-tennent workloads     HCI deployments are typically multi-tennant and often different nodes will support different types of workloads. It is very common to have large resource-hungry databases separated across nodes using anti-affinity rules.  As with traditional storage, applications are writing to a shared storage environment which is necessary to…

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