The good thing about this is that the grepping can be parallelised and distributed on to several nodes. Having said that, once you select the relevant metadata right, you should be able to narrow it down enough for the queries to be snappy enough.
While this will definitely be slower than something that indexes the contents, you'll be able to store much more in Loki at much lower costs.
While this will definitely be slower than something that indexes the contents, you'll be able to store much more in Loki at much lower costs.