Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am moving a tar.gz archive between servers and had to note that when extracting the archive a large amount of additional disk space is used. My original data size is 12G, 7.8G compressed and consumes an excess of 57G. I am copying from a zfs file-system to an ext4. Does anyone know if this issue is related to tar or to the file-systems used?

share|improve this question

migrated from May 29 '13 at 17:37

This question came from our site for professional and enthusiast programmers.

Ok, it appears the zfs file-system had compression enabled, which reduced the size of the archive by approximately 5 times. Zfs uses transparent compression (LZJB) and you can find more details here.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.