Hi!
I'm asking for a friend who's English is even more worse than mine.
That must be very bad English! :-)
- Is every revision saved? Meaning: if I change a slash into a
backslash in a text of 12 kB is the space needed changing to 24 KB? And if I change a "then" to a "than" ist it changing to 36 kB than?
Yes/no/it's complicated.
Usually yes, you have multiple versions of text stored separately. There is, however, batch compression script, that can either calculate deltas, concatenate, compress and write a blob, or just simply concatenate/compress and write a blob. On articles with large edit histories this can compress to 1% :)
- If I delete an article as an administrator, is it really wiped off the disk?
No.
Domas