Too frequently I hear the expression n+1 as a model for ESX clusters to provide High Availability. If you EVER expect to patch ESX servers without VM downtime then you need at least(†) n+2. When running your clusters to only n+1, you can never safely put one of your hosts in Maintenance Mode; not if High Availability is important […]
Dudley passed me the latest version of the Firewall diagram. Go and grab it: Here’s what’s new since the last download: What’s new in v3: Now synchronized with “VMware Network Ports Compendium v3” What’s new in v213: Change port range in VUM to 9000-9100 (and not 9000-9010) What’s new in v212: Added SRM Port 9007 […]
According to the vSphere 4.0 release notes (http://www.vmware.com/support/vsphere4/doc/vsp_esx40_vc40_rel_notes.html ) vCenter Server 4.0 becomes unresponsive in large environments if managing ESX Server 3.5 hosts prior to ESX 3.5 patch 10 vCenter Server 4.0 can become unresponsive in large environments after 30 days if it manages any ESX Server 3.5 hosts prior to ESX Server 3.5 patch […]
I’ve been using the new Storage VMotion functionality fairly heavily over the last couple of months. I have encountered a couple of significant bugs whilst using it, which have resulted in corrupted VMDK files. Here are my two tips when using Storage VMotion, to avoid the problems I have seen: Ensure that you have sufficient […]