I use to run Nod32. It only kept the latest AV pattern in it's mirror. When Nod updated AV patterns too often, WAN locations with limited bandwidth would go days never getting updated because the patterns would be replaced before the WAN clients could ever download them.

Now I run Symantec Antivirus. I have mirrors (GUPs) at remote sites. Symantec retains the last 3 pattern files, up to 500MB. That way these remote sites don't have the pattern files replaced while updating. They actually update.

What do ZCM Satellites do? I have some satellite servers with only 10kb/s to get their updates. If I increment the version of a zen app, replacing 100MB files in it, what is the affect on the satellite assuming the satellite already had the content?