I did not do instance migration nor did i install 9.1(ESE).
I already had 8.1(ESE) & 9.1 (ESE) installed,server instances created,up,running.
I created dbs under 8.1 & then using REDIRECT RESTORE ,restored them into 9.1 (by taking offline backup,copying the image files to new instance's home directory & running restore script).It worked for me.
What i want to know is can i call this as a migration?
Is there other way of doing this?
Whatever i have done is right way of doing it or not?