VMware
I was recently in a situation where I needed to retain an existing vCenter Server (5.0) managing a number of clusters and build a new vCenter Server (5.5), then move a single cluster to this new vCenter (including with it a number of ESXi servers and VMs).
After which the ESXi servers would be upgraded and the VMs running on those hosts.
This is a pretty straightforward process if you are only using vCenter server to manage server virtual machines and can be done without any downtime to the VMs.
However if this vCenter Server is used to manage and provision your desktops in a Horizon View environment then it's unfortunately it's not that simple.
A VMkernel port is required on each ESX server where the following services will be used:
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vMotion
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iSCSI
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NFS
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Fault Tolerance
Without a VMkernel port none of these services can be used on the ESX server.
Welcome to Part 3 of our vSphere 5.1 installation.
So what does the vCenter Inventory Service actually do?
vCenter Inventory Service reduces direct client requests to the vCenter server with query caching, reducing the load on core vCenter Server processes.
The main use case of the vCenter Inventory Service is to manage the vSphere Web Client inventory objects and property queries that the client requests when users navigate the vSphere environment.
The vSphere Web Client requests only information viewed on the screen, so navigation is more efficient.
In vCenter Server 5.0, vCenter Inventory Service was a separate process. With the updated vCenter Server, it is now a separate independent component and can be offloaded to a separate server or closer to the vSphere Web Client. This reduces traffic and improves response times.
After installing VMware Horizon View HTML Access on the Connection Server you may see the following error message:
"Your VMware Horizon View server does not support web access"
It is possible to present a snapshot of a LUN containing a VMFS datastore to ESX server(s).
You would do this if you wanted to create a point in time SAN based snapshot of several virtual machines (in the same VMFS datastore).
By presenting that snapshot to an ESX server you could mount all or just one VM back into vCenter to restore data etc.
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