On Fri, 27 Jan 2006 12:30:49 -0800, Donn Cave <[EMAIL PROTECTED]> wrote:
>In article <[EMAIL PROTECTED]>, > rbt <[EMAIL PROTECTED]> wrote: >> Won't work!? It's absolutely fabulous! I just need something big, quick >> and zeros work great. >> >> How the heck does that make a 400 MB file that fast? It literally takes >> a second or two while every other solution takes at least 2 - 5 minutes. >> Awesome... thanks for the tip!!! > >Because it isn't really writing the zeros. You can make these >files all day long and not run out of disk space, because this >kind of file doesn't take very many blocks. The blocks that >were never written are virtual blocks, inasmuch as read() at >that location will cause the filesystem to return a block of NULs. > I wonder if it will also "write" virtual blocks when it gets real zero blocks to write from a user, or even with file system copy utils? Regards, Bengt Richter -- http://mail.python.org/mailman/listinfo/python-list
