Dear CentOS mirror administrators, There are many mirrors, but few mirrors provides DVD images. I believe most of all mirrors have enough resources to provide DVD images. You always say the master can't provide DVD images for all mirrors without enough resources. I suggest introducing mirror hierarchy as follows to solve this problem. Administrators of servers with enough facilities stand as candidates of sub-master server. You may chose at most two or three servers in one country, and allow only sub-masters to access the bunch of master servers. In this case, All masters should provide DVD ISO images. In my humble estimation, sub-masters should have at least 500 Mbps of effective bandwidth dedicated to CentOS. They should also provide rsync service able to have more than 20 simultaneous connections. The word `effective' means sub-masters should transfer more than 5 Tbytes per day only for CentOS. As for our server, it can easily satisfy these criteria. Sub-masters may synchronize with the master each hour. Other mirrors may synchronize with the sub-masters 2-4 times per day. Sub-masters should properly share the rsync ACL with the masters to distribute new releases secretly in advance. Please investigate this idea. Regards, -- Kazuhiro Fujieda JAIST FTP Admins <ftp-admin at jaist.ac.jp> http://ftp-admin.blogspot.com/