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Create a Linux VM with KVM in 6 easy steps
A Step-by-step guide to creating a Linux virtual machine on a Linux host with KVM,qemu,libvirt and ubuntu cloud images.
Latest Posts
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Using cloud-init with AHV command line
TL;DR Using cloud-init with AHV is conceptually identical to using KVM/QEMU- we need to use a few different tools with…
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Beware of tiny working-set-sizes when testing storage performance.
I was recently asked to investigate why Nutanix storage was not as fast as a competing solution in a PoC…
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Comparing RDS and Nutanix Cluster performance with HammerDB
tl;dr In a recent experiment using Amazon RDS instance and a VM running in an on-prem Nutanix cluster, both using…
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Single threaded DB performance on Nutanix HCI
tl;dr A Nutanix cluster can persist a replicated write across two nodes in around 250 uSec which is critical for…
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AHV Tip: Shutdown multiple VMs in parallel
Often in my lab I want to shutdown a large number of VMs quickly. In the example below I submit…
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AOS 6.1 Improvements for Day-2 database operations.
AOS 6.1 greatly improved database performance on Nutanix especially when the guest VM uses just a single disk for all…
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How to deploy Ubuntu cloud images to Nutanix AHV
In this example we use the KVM cloud image from the Canonical Ubuntu image repository. More information on Ubuntu cloud…
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[Guest Post] Why I became a performance engineer
First Off, I want to thank Gary for giving me an opportunity to be a guest writer on his blog,…
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Nutanix Performance for Database Workloads
We’ve come a long way, baby. Full disclosure. I have worked for Nutanix in the performance engineering group since 2013.…
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How to generate a new hostid for a Cassandra node.
If you clone a Cassandra VM with the goal of creating a cassandra cluster – you may find that every…
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Using rwmixread and rate_iops in fio
Creating a mixed read/write workload with fio can be a bit confusing. Assume we want to create a fixed rate…
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Understanding fio norandommap and randrepeat parameters
The parameters norandommap and randrepeat significantly change the way that repeated random IO workloads will be executed, and also can…
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How to drop tables for HammerDB TPC-C on SQL Server
From the SQL Window of SQL*Server. Issue these commands to drop the tables and procedures created by HammerDB. This will…
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Understanding Concurrency Parameters in pgbench
How to use the “jobs” and “clients” parameters in pgbench without going crazy.
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A Generalized workload generator for storage IO
With help from the Nutanix X-Ray team I have created an IO “benchmark” which simulates a “General Server Virtualization” workload.…
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Advanced X-Ray: reducing runtime by re-using VMs.
How to speed up your X-ray benchmark development cycle by re-using/re-cycling benchmark VMs and more importantly data-sets.
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Cross rack network latency in AWS
I have VMs running on bare-metal instances. Each bare-metal instance is in a separate rack by design (for fault tolerance).…
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How to performance test Nutanix on AWS with X-ray
End to End Creation of a Nutanix Cluster on AWS and Running X-Ray
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Postgres pgbench scale-factors and WSS
Scale factor to workingset size lookup for tiny databases