If its in English, I will be able to understand  ... View more

perhaps you could to to one index, say the one with 8 sourcetypes...search it index=1 sourcetype=s1 OR sourcetype=s2.... OR sourcetype=s8 once you get that data, tag* it or create an eventtype that holds that data & thus will be able to combine the two indexes easily now that you have taken care of the index with many sourcetypes by assigning a tag or eventtype to the index with many sourcetypes ... View more