chetanddesai
commented
8 years ago - What happens when the process crashes when there is a lock and you're downloading?
- Always download to a different directory and then link it. https://nodejs.org/api/fs.html#fs_fs_linksync_srcpath_dstpath
- https://github.com/npm/lockfile/blob/master/lockfile.js
Many times we run multiple stateless node processes. When multiple processes get a cache miss, we need to lock so both don't start a download from s3.