We are migrating our sites from teamsite 7.2 to 7.4.1.
Could someone let me know the steps involved and if we can use iwmigrate to do the migration
To answer your question, yes you can, but you may not need to.
There is no correct answer but you can either upgrade the server from 7.2 to 7.4.1 and keep the same backingstore (if you want to reuse the same server) or install 7.4.1 on a new server and point it to a local copy of the 7.4.1 store.
Ok, we have 7.2 and 7.4.1 installed on different servers. The 7.4.1 was newly installed.
The old site on 7.2 have to be migrated/upgraded to 7.4.1
Pointing to the local store.
waht do we use to point to the local store. can this be done through UI
No
You need to make a copy of the store (after shutting down the 7.2 server).
Pointing to the store is different on Unix than on Windows (/etc/defaultiwstore or registry)
we are not migrating the complete store at once. we wanted to do this one branch at a time
is there anyway we can do this branch by branch instead of doing the whole store.
Yes that is what iwmigrate does, operates on a branch by branch basis. You can do that on the source or on the destination.