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 [...]
Datacenters vs Clusters within the vCenter Inventory
Posted by Kenneth van Ditmarsch on February 3, 2012
http://virtualkenneth.com/2012/02/03/datacenters-vs-clusters-within-the-vcenter-inventory/
Running scripts on the ESXi shell with correct time-stamps
While working on the ESXi shell you might notice that the “date” command returns the UTC time instead of displaying the correct time zone like ESX Classic does. This is by design within ESXi and stated in this VMware KB article: ESXi uses UTC time and does not support changing time zones Although it’s not supported to [...]
Posted by Kenneth van Ditmarsch on January 26, 2012
http://virtualkenneth.com/2012/01/26/running-scripts-on-the-esxi-shell-with-correct-time-stamps/
Dutch vBeers – 14 July 2011
Another vBeers gathering will be held on Thursday 14th of July starting from 6:00pm in ‘Cafe de Omval’ which is located near the Amsterdam Amstel station. This venue is selected since it’s easy to reach for people not coming from Amsterdam and serves a fine of selection of beers along with soft drinks and bar [...]
Posted by Kenneth van Ditmarsch on July 13, 2011
http://virtualkenneth.com/2011/07/13/dutch-vbeers-14-july-2011/
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 [...]
Posted by Kenneth van Ditmarsch on June 29, 2011
http://virtualkenneth.com/2011/06/29/vm-swapfile-vswp-placement-with-srm/
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. [...]
Posted by Kenneth van Ditmarsch on June 7, 2011
http://virtualkenneth.com/2011/06/07/self-employed-delivering-virtualization-consultancy/
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 [...]
Posted by Kenneth van Ditmarsch on March 10, 2011
http://virtualkenneth.com/2011/03/10/how-to-get-device-identifiers-for-io-devices/
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 [...]
Posted by Kenneth van Ditmarsch on February 15, 2011
http://virtualkenneth.com/2011/02/15/vmfs3-heap-size-maxheapsizemb/
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
Posted by Kenneth van Ditmarsch on February 7, 2011
http://virtualkenneth.com/2011/02/07/vcenter-performance-tab-real-time-vs-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.
Posted by Kenneth van Ditmarsch on December 13, 2010
http://virtualkenneth.com/2010/12/13/design-vmware-ft-network-activeactive-or-activepassive/
VMware vCenter Port 80 invalid or already in use
While installing VMware vCenter 4.x with Microsoft SQL 2008 (R2) installed on the same system you might get the following error message: The following port numbers are either invalid or already in use. VMware VirtualCenter HTTP Port: 80 By default vCenter wants to use port 80 for the HTTP service and using the netstat command you [...]
Posted by Kenneth van Ditmarsch on December 8, 2010
http://virtualkenneth.com/2010/12/08/vmware-vcenter-port-80-invalid-or-already-in-use/
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