Le 10/12/2015 23:29, rob@xxxxxxxxx a écrit :
Aren't there upgrades which may affect user data? Something like the
*TYPE1 to *TYPE2 conversion of stream files comes to mind. STROBJCVN.
These sorts of things. Probably not insurmountable. Much like once we
upgrade "backup" and switch to it, "primary" doesn't come back up until
it's upgraded also.
Yes, you are right. As the objects in the IASP can switch from one
system to another, they can switch from one operating system level to
It means that the time window between the upgrade of the first system
and the upgrade of the second must be as short as possible. You can no
longer switch back from the "upgraded" system to the "not yet upgraded"
As an example (yes, an old example because of old versions, but the same
kind of situation may occur again), let's assume a PowerHA cluster on
V5R4 IBM i partitions, that you want to upgrade to 6.1.
If you first upgrade to 6.1 the partition with the backup role, then
switch over, the programs will be converted at switch over time. And you
will not be able to switch back until the upgrade of the partition with
the initial primary role.
If you first upgrade to 6.1 the partition with the primary role, you
have to switch over first to keep the production running. The programs
will be converted when you switch back. Once they are converted, you can
no longer switch over again until the backup is upgraded also to 6.1.