Hi all, I went ahead and made a quick document describing how all the storage files get laid out, since right now I don't think anything like that exists. It's something we should have described at least a little, as otherwise the only way to know is to read the code. It is good to know what to expect in those folders for diagnosing lots of storage/persistence related issues.
The document is here: https://cwiki.apache.org/confluence/display/ASTERIXDB/AsterixDB+On-Disk+File+and+Folder+structure . Suggestions/corrections are more than welcome of course. - Ian