[donboscow]

I am aware that I need more learning, no need for that advice. I also know that BM25 and PageRank are different, were they the same, there wouldn't have been a need for two of them, my question was ver clear - which one in the long run yields better (in terms of relevance) search results comparatively. I am also aware that ES is a starter pack and Google is a beast that will need much much more than just an ES stack, what i wanted to know was - whether ES offers the capabilities to fine tune it to make it behave like such a beast. Thank you for your advice, but it is better if you read the question first before lecturing others in a condescending manner.