The question that Matthew Kaufman proposed was specifically asking about app architecture deployments, so what Facebook is choosing to do is entirely germane.
- Matt On Mon, Jun 01, 2015 at 02:43:27PM -0400, Todd Underwood wrote: > fb is not a 'cloud provider'. > > it's orthogonal to the question. > > t > > On Mon, Jun 1, 2015 at 2:36 PM, Ca By <cb.li...@gmail.com> wrote: > > > On Mon, Jun 1, 2015 at 10:49 AM, Matthew Kaufman <matt...@matthew.at> > > wrote: > > > > > On 6/1/2015 12:06 AM, Owen DeLong wrote: > > > > > >> ... Here’s the thing… In order to land IPv6 services without IPv6 > > support > > >> on the VM, you’re creating an environment where... > > >> > > > > > > Let's hypothetically say that it is much easier for the cloud provider if > > > they provide just a single choice within their network, but allow both v4 > > > and v6 access from the outside via a translator (to whichever one isn't > > > native internally). > > > > > > Would you rather have: > > > 1) An all-IPv6 network inside, so the hosts can all talk to each other > > > over IPv6 without using (potentially overlapping copies of) RFC1918 > > > space... but where very little of the open-source software you build your > > > services on works at all, because it either doesn't support IPv6 or they > > > put some IPv6 support in but it is always lagging behind and the bugs > > don't > > > get fixed in a timely manner. Or, > > > > > > > > > Facebook selected IPv6-only as outlined above > > > > http://blog.ipspace.net/2014/03/facebook-is-close-to-having-ipv6-only.html > > > > > > > > > > 2) An all-IPv4 network inside, with the annoying (but well-known) use of > > > RFC1918 IPv4 space and all your software stacks just work as they always > > > have, only now the fraction of users who have IPv6 can reach them over > > IPv6 > > > if they so choose (despite the connectivity often being worse than the > > IPv4 > > > path) and the 2 people who are on IPv6-only networks can reach your > > > services too. > > > > > > Until all of the common stacks that people build upon, including > > > distributed databases, cache layers, web accelerators, etc. all work > > > *better* when the native environment is IPv6, everyone will be choosing > > #2. > > > > > > And both #1 and #2 are cheaper and easier to manage that full dual-stack > > > to every single host (because you pay all the cost of supporting v6 > > > everywhere with none of the savings of not having to deal with the > > > ever-increasing complexity of continuing to use v4) > > > > > > Matthew Kaufman > > > > > > > > > -- Designing an effective undergrad CS degree is hard. It's no wonder so many ivy-league schools have more or less given up and turned into Java Certification shops. -- Steve Yegge, http://steve-yegge.blogspot.com/2007/06/rich-programmer-food.html