6.7

To synchronize ESXi clocks with an NTP server, you can use the VMware Host Client. For information
about editing the time configuration of an ESXi host, see vSphere Single Host Management.
Transferring Data from an Existing vCenter Server Appliance
You can transfer data from an existing vCenter Server Appliance external database to the embedded
PostgreSQL database in use by version 6.7 of the vCenter Server Appliance.
Both the Windows-based vCenter Server upgrade and vCenter Server Appliance migration procedures let
you copy the minimum amount of data needed to be operational, minimizing downtime. You can then
copy the remaining data from the external database to the embedded PostgreSQL database in the
background, preserving your deployment's historical event and performance data.
You can migrate the following types of data from an external database to the embedded PostgreSQL
database in use by version 6.7 of the vCenter Server Appliance.
Configuration data This is the minimum type of data you must transfer from your existing
vCenter Server Appliance external database to upgrade or migrate to a
functioning vCenter Server Appliance. This data can be transferred in a
reasonably short amount of time, minimizing downtime during the upgrade
to vCenter Server Appliance 6.7.
Configuration and
historical data
In addition to the configuration data, you can choose to transfer historical
data such as usage statistics, events, and tasks. The vCenter Server
Appliance installer gives you the option to copy both the configuration and
historical data at once, or to copy only the configuration data during the
upgrade process. You can then choose to copy the historical data in the
background after you start your new vCenter Server.
Attention If you choose to copy all data and once, you cannot start
vCenter Server until all of the data has been transferred to the embedded
PostgreSQL database within vCenter Server Appliance 6.7.
Configuration,
historical, and
performance metrics
data
This is the largest amount of data you can choose to transfer to
vCenter Server Appliance. As with the configuration and historical data, you
can choose to copy only the configuration data during the upgrade process,
and then copy the historical and performance data in the background after
the upgrade or migration to vCenter Server Appliance 6.7 is complete.
You can transfer historical data after the upgrade or migration from the following vCenter Server versions
and external databases to the embedded PostgreSQL database within vCenter Server Appliance.
Table 3‑6. vCenter Server database support for data transfer after upgrade or migration
vCenter Server Versions Databases
vCenter Server Appliance 6.7 Support
for Data Transfer
vCenter Server Appliance 6.0
External Oracle database Supported
Embedded PostgreSQL database Not supported
vCenter Server Upgrade
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