active.Z or active.all-alt.Z

[Yutaka KAWASE]

Hi all,

What is the difference between active.Z and active.all-alt.Z resides
in ftp.isc.org/pub/usenet/CONFIG/ ?

I know active.all-alt is bigger but why ISC people make two different
active file?

Actually I am planning to syncronize active fine on my news server
with isc.org. In such case should I fetch active.Z instead of
active.all-alt.Z ? Why?

Thanks for your help in advance.

-- 
Yutaka KAWASE <yutaka at mailhost.net>