Will doing multi-site between v9 and v8 work without any glitches or special tweaking needed? I have two separate web site instances on v8.00.21 that I want to multi-site, and want to step up to v9 since it seems more of the development and infusion/theme etc., efforts target v9. But I want to do one site at a time after I multi-site them. Does anyone see any problem with this?
Care to explain your multi-site environment in a bit specific?
Is it where 2 site shares the same database?
If yes, most of the infusions on 9 can’t be used unless you port the v8 ones to the 9. The 9 forum uses different constants as well like DB_FORUM_POSTS or THREADS, etc so they likely won’t be recognised on the 8 level as well. Database name and structure wise also have quite a wide difference, since v8 uses the v7 ones.
Better don’t merge, you will be spending most of your time debugging instead of working on new content.
The only compatibility I see here is current v9.03 to v9.10 since we are working hand in hand with each other, content wise.