I have seen many people on the interwebs using dd and
/dev/zero to create empty files. This is great if the file is small, but for a 50Gb file, it simply takes too long, particularly on EC2. The solution? Truncate!
Boom – instant.
This is great for doing things like mounting /tmp on EC2 to the ephemeral storage so /tmp is not limited to 10Gb (or whatever your root image size is)
1 2 3 4