Datasheet
ManageMent SerViceS
|
31
Table 1.1: Built-in Cluster Compliance Checks
Cluster Requirement Cluster Compliance Check
VMware DRS Validate that VMotion NIC speed is at least 1000 Mbps.
Validate that VMotion is enabled.
Validate that at least one shared data store exists.
VMware DPM Validate that power management is supported on the host.
VMware HA/VMware FT Validate that FT logging is enabled.
Validate that FT logging NIC speed is at least 1000 Mbps.
Validate that all the hosts in the cluster have the same build for FT.
Validate that the host hardware supports FT.
Vce n t e r Se r V e r li n k e d Mo d e
A single instance of vCenter Server 4 can manage up to 300 hosts and 3,000 virtual machines.
This limit is not enough for organizations ramping up their virtualization projects to span an
entire data center. To meet these higher scalability requirements, vCenter Server 4 introduces a
feature called Linked Mode, where multiple vCenter Server systems can be linked together and
monitored from a single vSphere Client session. Using the Linked Mode feature, you can man-
age up to 1,000 hosts and 10,000 virtual machines across 10 vCenter Server instances.
Linked Mode leverages Microsoft Active Directory Application Mode (ADAM), an implemen-
tation of Lightweight Directory Access Protocol (LDAP), to store and synchronize data across
multiple vCenter Server instances. ADAM is installed automatically as part of the vCenter Server 4
installation. The ADAM instances in a group use peer-to-peer networking to replicate the follow-
ing information for each vCenter instance to the LDAP directory:
Connection information (IP and ports)
•u
Certificates and thumbprints•u
Licensing information•u
User roles and permissions•u
When vCenter Servers are connected in Linked Mode, you can do the following:
Log in simultaneously to all vCenter Servers using a valid credential
•u
Search the inventories of all the vCenter Servers in the group•u
View the inventories of all the vCenter Servers in the group in a single inventory view•u
When you log in vCenter using Linked Mode, you will see the inventory of all vCenter
instances at once. The inventory tree on the left side will show each vCenter instance at the top
level. You can then use the +/- indicator to expand or collapse the inventory tree to, respectively,
show or hide lower-level objects such as the data stores, folders, clusters, hosts, and so on, for
563601c01.indd 31 6/29/10 4:41:04 PM