All posts in category vSphere

Unable to enable the vSphere Authentication Proxy Plug-in

I recently had some issues getting the vSphere Authentication Proxy Plug-in to be enabled within vCenter Server 5.1. This is the error message that was displayed: “The server could not interpret the client’s request. (The remote server returned an error: (404) Not Found.)”   

Migrate to new vCenter Server while using dvSwitches

During vSphere 4.x to 5.x updates I occasionally run into the situation where dvSwitches are used on the current vCenter4  and the customer wants to install a fresh copy of vCenter5 (with a new dvSwitch). Within this article I will describe a minimum downtime (1 ping-loss or less) procedure to cover this, guided by pictures […]

Datacenters vs Clusters within the vCenter Inventory

Recently I got involved in a discussion about “Creating multiple Datacenters with one Clusters rather than one Datacenter with multiple Clusters” First of all lets get the definitions of these objects summarized (as stated in the vSphere Datacenter Administration Guide) Clusters A collection of ESX/ESXi hosts and associated virtual machines intended to work together as […]

VM Swapfile (.vswp) placement with SRM

Nowadays VMware Site Recovery Manager (SRM) gets implemented more and more and like vSphere, VMware SRM needs a good architectural design before starting off. One of the design considerations is around the placement of the Virtual Machine Swap File (.vswp) which I want to give some more information about in this article. Let’s first take […]

Self-employed, delivering Virtualization Consultancy

After working for VMware for over a year I decided to take the next step in my career: to start Van Ditmarsch Consultancy As a contractor I will be available to do Virtualization Consultancy, primarily focused on designing, implementing and/or validating VMware Virtualization solutions with a strong focus on business continuity, high availability and disaster recovery. […]

How to get Device Identifiers for I/O Devices

Recently I got a few questions about the VMware HCL and how to verify I/O devices without knowing all the key details of  the device. Let’s start of by looking at the VMware HCL, note that there are additional fields on which a search can be done for I/O Devices. The Device Identifiers are separated into the following items: VID […]

VMFS3 Heap Size (MaxHeapSizeMB)

This article gives you more information on the VMFS3.MaxHeapSizeMB advanced parameter. Let’s start off with VMware KB article 1004424 describing the method to increase the VMFS3 Heap Size in case you see the following error message in /var/log/vmkernel or /var/log/messages log: vmkernel: 8:18:59:58.640 cpu2:1410)WARNING: Heap: 1370: Heap_Align(vmfs3, 4096/4096 bytes, 4 align) failed. caller: 0x8fdbd0 vmkernel: 8:18:59:58.640 […]

vCenter Performance Tab – Real-time vs. Historical Data

Recently I received a question about the Performance tab within vCenter which intrested me. Looking at the available Chart Options we can see that there are two distinctive performance streams: Real-time data Historical data

Design VMware FT Network, active/active or active/passive

I recently had a design discussion about the best way to configure the VMware Fault Tolerance Logging network. During the discussion we quickly established that you want to assure redundancy for the VMware FT Logging network. The most interesting part of the discussion was how to configure the vSwitch dedicated for FT traffic.

BIOS settings in a VMware ESX(i)/vSphere Environment

Over the last period I’ve noticed that a lot of customers aren’t aware of BIOS settings that can be changed as a best practice for VMware ESX(i)/vSphere environments. In this article I want to outline some of these best practices specifically based on HP Hardware, but feature-like options are available within other vendors as well. […]