OJS 3.0.2 download file size disparity

Software Support
1

The OJS download page says 18 MB for the Download OJS 3.0.2 (.tar.gz), but the actual download has only 17 MB. Is 18 MB a typo?

2

Hi @kksabu,

On my Linux machine:

$ du -m ojs-3.0.2.tar.gz 
18	ojs-3.0.2.tar.gz

…thus the file (with the same byte size) is reported 18M over here. I suspect the two tools round differently.

Regards,
Alec Smecher
Public Knowledge Project Team

3

I too got 18 MB when I test it in Ubuntu, but the actual byte size is different. Please see the screenshot.

4

Hi @kksabu,

Do you mean the difference between “Size” and “Size on disk” in your Windows screenshot? That’s an operating system consideration.

Regards,
Alec Smecher
Public Knowledge Project Team

5

Actually my concern is that in the OJS download page, download size is 18 MB. But when I download it is only ~17 MB. See the image…

6

There are a number of considerations in calculating file sizes in “megabytes”. Two in play here are:

  • the difference of whether you are counting in binary (1 KB = 1024 B, 1 MB = 1024 KB) or decimal (1 KB = 1000 B, 1 MB = 1000 KB)
  • the difference in the disk block usage (usually in blocks of 1 “MB”, but context-dependent)

See: https://linux.die.net/man/1/du

Display values are in units of the first available SIZE from --block-size, and the DU_BLOCK_SIZE, BLOCK_SIZE and BLOCKSIZE environment variables. Otherwise, units default to 1024 bytes (or 512 if POSIXLY_CORRECT is set).

SIZE may be (or may be an integer optionally followed by) one of following: KB 1000, K 1024, MB 10001000, M 10241024, and so on for G, T, P, E, Z, Y.

What you are seeing is expected. What really counts is the actual bytecount (and checksum).