I have a number of hosts to upgrade from 3.5 U1 to 3.5 U4 for which I am using Update Manager on Virtual Center 2.5 U4. During my initial testing it was taking approx 20 mins to completely update the host, including the reboot and final tasks. All the baseline contains is ESX 3.5 U4.
During the weekend just gone I upgraded a number of hosts of identical hardware to those in the testing and the time to complete each one was approx 1hr 10 mins. During the installation time processor usage on the host is high for the intital 20 mins then nothing for 10
mins - this coincides with 'Installing' messages in VC for 20 mins then nothing in VC for 10 mins. Subsequently there is a similar pattern of high process for 10 mins, then nothing for 10 mins and carries on
like this until completion.
The behaviour and time to completion is the same whether I update two hosts concurrently or a single host at a time.
This is causing me significant issues for the amount of time to complete the remaining hosts. Does anyone have any ideas on how I might get the speeds back up to the initial levels or maybe my expectations are too high and this is the expected time it should take to carry out the update from U1 to U4?
Thanks
