vCenter Server 6 has some fundamental architectural changes compared to vCenter Server Server 5.5. The multitude of components that existed in vCenter Server 5.x has been consolidated in vCenter Server 6 to have only two components vCenter Management Server and Platform Services Controller, formerly vCenter Server Single Sign-On.
- Platform Services Controller is either Embedded or External to vCenter Server
- Choosing a mode depends on the size and feature requirements for the environment
Platform Services Controller
vCenter Server Services
|· VMware vCenter Single Sign-On
· License service
· Lookup service
· VMware Directory Services
· VMware Certificate Authority
|· vCenter Server
· VMware vSphere Web Client
· Inventory Service
· VMware vSphere Auto Deploy
· VMware vSphere ESXi Dump Collector
· vSphere Syslog Collector on Windows and vSphere Syslog Service for VMware vCenter Server Appliance
Below is the configuration Maximums of PSC.
|Maximum PSCs per vSphere Domain||8|
|Maximum PSCs per site, behind a load balancer||4|
|Maximum objects within a vSphere Domain (Users and Groups)||1,000,000|
|Maximum tolerance for time skew between PSC nodes||5 minutes|
|Maximum Active Directory or OpenLDAP Groups per User for best performance||1015|
|Enhanced Linked Mode/Lookup Service|
|Maximum number of VMware Solutions connected to a single PSC||4 This limit is based on the test performed using only vCenter
|Maximum number of VMware Solutions in a vSphere Domain||10|
|Maximum number of subordinate Certificate Authority servers in the chain within VMware Certificate Authority||6|
|Maximum cryptographic hash used for PSC Node certificate||1|
|Maximum RSA Public Key length used for PSC Node certificate||16,384|
vCenter Server with Embedded PSC :
The embedded PSC is meant for standalone sites where vCenter Server will be the only SSO integrated solution. In this case a replication to another PSC is not necessary.
vCenter Server with External PSC :
External Platform Services Controller, vCenter Server and the vCenter Server components are deployed on one system, and the services included in the Platform Services Controller are deployed on another system.
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