Kia ora! I am about to migrate my biggest library yet to Koha - on the order of 500k records and 1.2m items. Running bulkmarcimport.pl on all of that takes some time - about 15 hours on the first run, and it will take longer when data needs to be deleted first. So I am wondering if there is any way to speed this up? Would it for example be possible to split the file of MARCXML to be imported into two (or more) and run more than one instances of bulkmarcimport.pl in paralell? Or would table locking etc make it take as long as just running one process? Any tips and tricks would be most welcome! (I'll document them on the wiki.) Best regards, Magnus Libriotech