[arein3]

> Isn't Loki's proposition that it only indexes the tags and time interval? Do you mean that even filtering by that there's still a lot of data to go through?

Yes

> Because it seems like you're saying it always fetches everything from disk.

If you specify a tag, like environment, it will not read the disk for data from other environments. But the tags like environment/host/timeframe are not enough if you want to query for something like error/exception/sessionid, and you might have to wait minutes/hours for a query which covers a lot of data.