VMbook: Practical Guide

VMbook: Practical Guide to Business Continuity and Disaster Recovery with VMware Infrastructure featuring Hardware and Software Solutions from:
AMD, Cisco, Dell, Emulex, Intel, NetApp, Sun Microsystems

Once you have VI installed, this is a fantastic 230 page manual for jumpstarting your VI BCP/DR planning and execution.

http://www.vmware.com/files/pdf/practical_guide_bcdr_vmb.pdf
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NFS datastores

One of the advantages to using NFS datastores in ESX(i) is that newly created VMs on the NFS storage default to creating .vmdk files in a thin format. This a type of thin provisioning and storage virtualization.
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Snapshot on ESX(i)

When creating a snapshot on ESX(i), consider not snapshotting the virtual machine's memory. By default the virtual machine memory will be included in the snapshot. Snapshotting a VM without the memory state will take a lot less time and disk storage. Understand, however, that you cannot revert to a live running VM without the saved memory state. The snapshot will be crash consistent.
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Storage vMotion failure

If you have encountered a Storage vMotion failure, take a look at the following 2 resources for recovery procedures:

http://www.van-lieshout.com/2009/03/how-to-recover-from-failed-svmotion/
http://kb.vmware.com/kb/1009113
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Cisco Nexus 1000V

The Cisco Nexus 1000V is made up of two pieces:

1. The Virtual Ethernet Module (VEM) - A drop in replacement of the standard vSwitch or vDS. VM vNIC traffic traverses this.
2. The Virtual Supervisor Module (VSM) - A VM running Cisco's NX-OS which controls the VEMs. Configurations are performed here and pushed to the VEMs.
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Disconnected template?

Got a disconnected template? Several solutions exist to resolve the problem:
-Disconnect and reconnect the ESX host which owns the template
-Restart the mgmt-vmware service in the ESX Service Console
-Restart the vCenter service
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New in VMware vSphere 4.1

What's New in VMware vSphere 4.1

VMware HA Scalability Improvements - VMware HA has the same limits for virtual machines per host, hosts per cluster, and virtual machines per cluster as vSphere. This lifts restrictions from the past which were dependent on variables such as number of hosts in a cluster, DRS, and HA enablement.

http://vmware.com/pdf/vsphere4/r41/vsp_41_config_max.pdf
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