Spent an hour trying to understand what was going on… (and over an hour writing about it sigh)
Basically, I moved my main Domino 8.5 server (400 GB) to ODS 51, as everyone suggested (set Create_R85_Databases=1 and did the compact thing).
Then I subsequently realized that doing backup/restores with R7 clients and R85 databases is a serious pain!
(Came through R4.6 > R5 and R5 > R6.5 before, how come we always forget this ?)
So I set out to revert the whole thing back to ODS 43.
Long story short, if you want to revert your ODS straight from R85 to R6/7, you need to:
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set config Create_R85_Databases=0
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set config Create_R8_Databases=1
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load compact -R
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set config Create_R8_Databases=0, before any other db gets copy-compacted!
If you don’t do this monkey business with the ini vars, “compact -R” either only goes back to R8 (with Create_R85_Databases=1), or sends you all the way back to R5! (with Create_R85_Databases=0).
Compact -c won’t ever revert the ODS (only upgrade it), even if Create_R8*_Databases in vars are not set.
Compact -R will only revert to the older than current ODS.
There’s no easy way to set the ODS back to the current default!
Of course, I could also have run compact -R and compact -c in a row, but this means Domino will do twice the work (sth want to avoid on a large server), and I really don’t feel like letting all my databases go through an R5 conversion, I’m really not sure all of them would survive!
There should really be an easier way to revert to ODS 43, as long as it’s still the default ODS in R8.5.