Resend, as it seems there was a problem before with mailing list... Il 21/Dic/2016 17:37, "Gianluca Cecchi" <gianluca.cecchi(a)gmail.com&gt; ha scritto: On Wed, Dec 21, 2016 at 5:11 PM, <ovirt(a)timmi.org&gt; wrote: Can you give more details, such as: - how many hosts? - how many DCs? - how many Clusters? - which kinds of storage domains in use (NFS, iSCSI, FC, ...)? - currently using Hosted Engine? Planning to use it in upgraded environment? - currently using reports and dwh and if so, currently using which database for them? - other custom configuration aspects? The more you give in advance the more other users can share about their experience. In general this guide for RHEV should be of help for oVirt too: https://access.redhat.com/documentation/en/red-hat-virtualization/4.0/paged/ upgrade-guide/ HIH as a first insight, Gianluca