On 05/06/2011 04:58 PM, Johnny Hughes wrote: > On 05/06/2011 03:43 PM, Charlie Brady wrote: >> >> On Fri, 6 May 2011, Johnny Hughes wrote: >> >>> Millions of users have built scripts that depend on certain rules, like >>> our use of dist tags, to remain constant. >> >> Millions? Really? And you made promises that your use of dist tags would >> remain constant? > > We explained how we do dist tags, yes. We said .el<X>.centos would be > used for packages that are modified. > > CentOS has millions of users, yes. The current estimate is somewhere > around 4 million. > > CentOS is installed on more Web servers that Fedora and Red Hat > Enterprise Linux combined: > > Centos: 29.2% (Linux), 9.3% (Entire Web) > RHEL: 14.5% (Linux), 4.6% (Entire Web) > Fedora: 6.5% (Linux), 2.1% (Entire Web) > > So yes, Charlie, there are millions of machines that use CentOS. > > At least 8 of the top 500 super computers in world run CentOS. > > Almost everyone one of them has some kind of script written for it. Do > all of them care about dist tag. Of course not. > > However, if we make a major change (like changing our dist tag), we have > no idea how it will impact people. What kind of puppet deploy rules out > there might have .el5.centos in their rules? How about cobbler? What > about people's kickstarts? How about the guys that use spacewalk. What > about the major corporation that pulls out all the .centos files and > replaces those with their own, etc. > > I know how it will impact me personally ... it will require several > python, bash and perl scripts to be rewritten in the system that we use > to build, mirror, and distribute CentOS. It will impact everything from > the scripts that we use to pull down files from upstream and where they > get put to how we check files against each other, to how we send e-mails > to the announce list, etc., etc. > > Who knows the impact on the Example ISP who is host 50,000 CentOS > servers using CPanel or the Example2 ISP that does all their machines on > xen VMs ahd deploys with cobbler. What about the OSes that use CentOS > as a basis for them (ClearOS, Rocks Clusters, etc.). > > The point is, we can't just change things mid stream because we have no > idea what scripts and software from which users might do something with > dist tag. > > I can tell you that when Red Hat changed the way they did dist tag, it > had a major impact on the CentOS Project. We changing our dist tag > could have the same kind of impact on others. 9.3% of the world's > Internet runs on CentOS. 9.3% ... quite a lot. Here are a couple other references: Amazon EC2: http://www.bio-itworld.com/news/04/25/2011/Meet-Tanuki-ten-thousand-core-supercomputer-in-cloud.html Ranger: http://blogs.sun.com/jonathan/entry/lone_ranger -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 253 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos-devel/attachments/20110506/82ecf828/attachment-0005.sig>