[Add] Looking at the problem space for real numbers....

["Winfield, Alister" <[e-mail]>]

I have many questions that require facts top back them up partly to help guide us on priority of issues that we ought to be discussing and on the scale of the problems we are likely to be facing as implementors and deployers of DoH.

Starting with probably the easiest to state question. Up scaling required with any transition to DoH.

Does anyone here have any measurements to define the sizing in terms of:

                Number of connections at the DoH server vs the same service on plain DNS (assuming UDP connection is roughly equivalent to unique IP’s seen per n seconds).
                Connection rate at the DoH servers (tricky given we have so few clients at the moment).
                Query rates vs plain DNS assuming that in the end solutions may well lose all DNS caching at the OS / Customers Access Device (CPE) layers / Other.
               (Before anyone says it yes some of these caches are bypassed already that’s one reason simple modelling of the system to get a likely scaling factor is so complex)

Alister.
Information in this email including any attachments may be privileged, confidential and is intended exclusively for the addressee. The views expressed may not be official policy, but the personal views of the originator. If you have received it in error, please notify the sender by return e-mail and delete it from your system. You should not reproduce, distribute, store, retransmit, use or disclose its contents to anyone. Please note we reserve the right to monitor all e-mail communication through our internal and external networks. SKY and the SKY marks are trademarks of Sky Limited and Sky International AG and are used under licence.

Sky UK Limited (Registration No. 2906991), Sky-In-Home Service Limited (Registration No. 2067075), Sky Subscribers Services Limited (Registration No. 2340150) and Sky CP Limited (Registration No. 9513259) are direct or indirect subsidiaries of Sky Limited (Registration No. 2247735). All of the companies mentioned in this paragraph are incorporated in England and Wales and share the same registered office at Grant Way, Isleworth, Middlesex TW7 5QD