Category: VMware

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Introduction 2016 NUMA Deep Dive Series

Recently I’ve been analyzing traffic to my site and it appears that a lot CPU and memory articles are still very popular. Even my first article about NUMA published in february 2010 is still in high demand. And although you...

/ 6 July 2016
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ntpq -p connection refused error message

Sometimes a small misconfiguration can cause havoc in a complex distributed system. It becomes really annoying when no proper output is provided by log files and status report. While investigating time issues in my lab I ran into the following...

/ 30 May 2016
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Monitoring power consumption of your home lab with a smart plug

Home labs are interesting beasts, at one hand you would love to have all the compute, storage and network power available, on the other hand you do not want to have a power bill similar to a Google data center.I...

/ 19 May 2016
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Adjust timeout value ESXi Embedded Host Client

I love to use the ESXi Embedded Host Client next to vCenter in my lab. It’s quick, it provide most of the functionality and best of it all it has a functioning VM console when accessing it from a MAC....

/ 12 April 2016
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Insights into CPU and Memory configuration of ESXi Hosts

Recently Satyam Vaghani wrote about PernixData cloud. In short PernixData Cloud is the next logical progression of PernixData Architect and provide visibility and analytics around virtual datacenters, it’s infrastructure and applications.As a former architect I love it. The most common...

/ 23 December 2015
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Ballooning, Queue Depths and other back pressure features revisited

Recently I’ve been involved in a couple conversations about ballooning, QoS and queue depths. Remarks like ballooning is bad, increase the queue depths and use QoS are just the sound bits that spark the conversation. What I learn from these...

/ 20 May 2015
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DB Deepdive part 6: Query Plans, Intermediate Results, tempdb and Storage Performance

Welcome to part 6 of the Database workload characteristics series. Databases are considered to be one of the biggest I/O consumers in the virtual infrastructure. Database operations and database design are a study upon themselves, but I thought it might...

/ 9 April 2015
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Database workload characteristics and their impact on storage architecture design – part 5 – Query Execution Plans

Welcome to part 5 of the Database workload characteristics series. Databases are considered to be one of the biggest I/O consumers in the virtual infrastructure. Database operations and database design are a study upon themselves, but I thought it might...

/ 7 April 2015
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Virtual Datacenter scaling problems with traditional shared storage – part 2

Oversubscription RatiosThe most common virtual datacenter architecture consists of a group of ESXi hosts connected via a network to a centralized storage array. The storage area network design typically follows the core-to-edge topology. In this topology a few high-capacity core...

/ 12 March 2015
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Memory Deep Dive Summary

This is last part of the memory deep dive. As the total series count 7667 words, I thought it would be a good idea to create a summary of the previous 6 parts. The memory deep dive series:Part 1: Memory...

/ 2 March 2015
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Memory Deep Dive: NUMA and Data Locality

This is part 6 of the memory deep dive. This is a series of articles that I wrote to share what I learned while documenting memory internals for large memory server configurations. This topic amongst others will be covered in...

/ 27 February 2015
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Memory Deep Dive: DDR4 Memory

This is part 5 of the memory deep dive. This is a series of articles that I wrote to share what I learned while documenting memory internals for large memory server configurations. This topic amongst others will be covered in...

/ 25 February 2015