[OSM-dev] tiles at home disk usage

Sebastian Spaeth Sebastian at SSpaeth.de
Wed May 2 14:37:18 BST 2007


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Jeroen Dekkers wrote:
> A tile which is fully the same colour is 571 bytes. That can also be
> green tiles from parks etc, but I guess most of them is water. I count
> 12,698,593 of them. That would be 6.5G in size. But if they have to be
> stored in 512 bytes sectors, that would mean 1024 bytes of diskspace
> used per tile, making it 13G in total.

So by symlinking identical 571-byte-tiles rather than storing them at a
slightly bigger than 1 sector size would save us nearly 6GB ? Not bad.
We should be doing this anyway.

Spaetz
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (Darwin)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFGOJQObtVRNeSDtgERAiIZAKDrvuzBsGyj8jg/jC6GGysj8y4gTACg6Nj2
sUARFyR0YKaR34cwc1kbD5U=
=VgKx
-----END PGP SIGNATURE-----




More information about the dev mailing list