esxi

vSphere 5.5 Update 3 Released: Features and Top Fixes

vSphere 5.5 Update 3 was released earlier today and there are a bunch of bug fixes and feature improvements in this update release for both vCenter and ESXi. For most Service Providers updating to vSphere 6.0 is still a while away so it’s good to have continued support and improvement for the 5.5 platform. I’ve […] Read More

Leap Second Bug: Worth a Double Check…

In 2008 I vividly remember the impact that leap year/day/seconds can have on systems that are not prepared to handle the changes in time or date. It was the 29th of February and at the time I was working for a Service Provider offering Hosted Exchange services based on Exchange 2007. All off a sudden […] Read More

Quick Post: One Stop Shop for ESXi Driver Downloads

Today I needed to update an Emulex NIC Driver for an new host that I installed using the VMware ESXi 5.5 Update 2 base image. I needed to chase up the latest OEM update bundle for the elxnet drivers… Generally sourcing these driver bundles can be a bit of a pain but I remembered a conversation I […] Read More

ESXi 5.x NFS IOPS Limit Bug – Latency and Performance Hit

There is another NFS bug hidden in the latest ESXi 5.x releases…while not as severe as the 5.5 Update 1 NFS Bug it’s been the cause of increased Virtual Disk Latency and Overall Poor VM performance across a couple of the environments I manage. The VMwareKB Article referencing the bug can be found here: Symptoms […] Read More

Nested ESXi – Reduced Network Throughput with Promiscuous Mode PortGroups

We have been conducting performance and stress testing of a new NFS connected storage platform over the past month or so and through that testing we have seen some interesting behaviours in terms of what effects overall performance relative to total network throughput vs Latency vs IOPS. Using a couple of stress test scripts, we […] Read More

PSOD Warning: IBM HS23 Blades, Emulex 10GB Network Adaptors and ESXi 5.1

This is a quick informational post to warn anyone running an Emulex based 10GbE Converged Ethernet adapter in an IBM Blade Center with HS23 Series Blade servers with ESXi 5.x … Fix is below. You are at risk of simultaneous host failure via the VMware PSOD under unspecified conditions if you do not update to the […] Read More

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