Lets Design, Implement and do Administration of ESX3

Virtualization with VMWare Infrastructure 3.0

Basic System Administration

Posted by Preetam on March 24, 2007

Bullet points from Basic system Administration Guide -Part01

  • The text is sent as a notice message to all active session users and to new users when they log in. The MIB definition files can be found at C:\Program Files\VMware\Vmware VirtualCenter\MIBS when the default installation directory is used.
  • You can perform migration between datacenters, the root folder is set as a default for every virtualcenter server, you can change the name but not add or remove it.
  • When you add multiple ESX servers to Virtual Center, VC will identify any naming conflicts that exist between virtual machines and alerts system administrator, who can rename virtual machines as necessary. The name can be 80 character long and may contact underscore,hypen.
  • Disconnecting managed hosts differs from removing it, when you disconnect it; virtual center monitoring activities are temporarily suspended. When you remove it, VC stops are monitoring and managing functions of that managed host. Hosts and all VMs on the host are removed from the inventory but historical data is not removed from VC database.
  • When adding or removing hosts, make sure NFS mounts are active, if NFS are unresponsive, the operation fails.
  • Systems with dual-core processor (two CPU cores in each processor) must use ESX server 2.5.2. VC licenses are issused by pairs of processor packages not by processor cores. Host can be removed from the cluster only if all of the virtual machines on it are powered off and host is placed into maintenance mode.
  • The Virtual CPUs page does not appear if the host is single-processor or the guest operating system does not support SMP (for example, NetWare and Windows NT 4.0)
  • When you map a LUN to a VMFS volume, virtual center creates a file that point to the LUN.Encapsulating disk information to the file allows VC to lock the LUN so that only one Virtual Machine can write to it.



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