At Fri, 22 Aug 2008 00:29:40 -0500,

Galchin, Vasili wrote:

>      2) does the hackage database have a "reader/writer" lock to protect
> readers, i.e. people downloading when I am uploading?

 1. new versions must have a different version number
 2. the version number is in the tarball name

 therefore:

 3. uploading a new version is a non-destructive operation and will
 not affect anyone downloading older versions.

At least, that is my understanding.

j.