сколько нужно трафика на поддержание актуального зеркала distfiles

# Gentoo source mirror config

RSYNC="/usr/bin/rsync"
#OPTS="--quiet --recursive --links --perms --times --devices --delete --timeout=300 --exclude=/ --include=/distfiles --include=/snapshots"
OPTS="-v --recursive --links --perms --times --devices --delete --timeout=300 --exclude=/experimental --include=/distfiles --include=/snapshots --exclude=/grp --exclude=/releases --delete-excluded"
#Uncomment the following line only if you have been granted access to rsync1.us.gentoo.org
#SRC="rsync://rsync1.us.gentoo.org/gentoo-portage"
#If you are waiting for access to our master mirror, select one of our mirrors to mirror from:
SRC="rsync://ftp.ussg.iu.edu/gentoo-distfiles"
DST="/home/uploads/gentoo/source/"

echo "Started update at" `date`
${RSYNC} ${OPTS} ${SRC} ${DST}

Кроме того
1) man emerge
2) http://www.gentoo.org/doc/en/rsync.xml
3) http://www.gentoo.org/doc/en/source_mirrors.xml