Hi again,
after replacing CRLF in 4 mboxes dsync was able to sync all of the 30+GB mailstore to mdbox.
Now the (repeated) calling of dsync yields info messages of the kind
dsync(athimm): Info: old/speicher: highest_modseq changed: 1 != 10 dsync(athimm): Info: root/root-heretic: highest_modseq changed: 1 != 10 dsync(athimm): Info: lists/ccrma.stanford.edu/planetccrma: highest_modseq changed: 11 != 14
I actually have 987 such messages for a total of 1115 mboxes. I checked a couple of them to see whether this is a CRLF issue and found no CRLF, so it's probably something different.
As long as the mboxes were still being delivered to or read from I thought it was normal, but I'd like to see a silent dsync which would give me more confidence in the migration process. So I kept from delivering to the mbox store as well as reading from it and performed multiple dsyncs.
The output of dsync became stable, e.g. the "highest_modseq changed" messages were exactly the same. Before nuking all indexes from the mbox storage and the mdbox itself and then repeating the whole process (which does take a long time), I wanted to know whether I should debug something.