From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from tuna.sandelman.ca (tuna.sandelman.ca [IPv6:2607:f0b0:f:3:216:3eff:fe7c:d1f3]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id B004E3B29E for ; Thu, 20 Apr 2023 10:12:51 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by tuna.sandelman.ca (Postfix) with ESMTP id 9B4D23898C; Thu, 20 Apr 2023 10:30:22 -0400 (EDT) Received: from tuna.sandelman.ca ([127.0.0.1]) by localhost (localhost [127.0.0.1]) (amavisd-new, port 10024) with LMTP id bycjyqGIz4Qm; Thu, 20 Apr 2023 10:30:21 -0400 (EDT) Received: from sandelman.ca (unknown [IPv6:2607:f0b0:f:2:40a:34ff:fe10:f571]) by tuna.sandelman.ca (Postfix) with ESMTP id 54AB63898B; Thu, 20 Apr 2023 10:30:21 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sandelman.ca; s=mail; t=1682001021; bh=YULzaXPljvwTn04P2Jk8//cfbZw15acaqf6Qe1QNg2E=; h=From:To:Subject:In-Reply-To:References:Date:From; b=kRRpund4gsiPpR+jpuJFyGsp8+JXCQoi44xzB+TBwFDYR+0qOg2vmgMNZ3EvcIjcP kFt3qkGsNO6FpHkHG4Oikvsw9skuSYDqSPZHu/Qa3xOwK1TjQwVrPfVxUsFMh1K0oi 6NqKoxJmEzoGtJB9TVVjucFdejy1Ql2reuz3LcZP0LfdINtP9MjrEZz4/rBrGhE6GJ AGkmUrKZqTP7diMEco7x/c2HY6CBVc+AWTkqZ5BU4OqScyHl2E1zfy75p5IbRwG/Tp nNZi5l/G9ipuJtE4XWMFYJvOnUNFg9Vr41xarIIDHhDQbe1nxrCzi/4NtYO6dqiRAe pTKh66SyQxhQQ== Received: from localhost (localhost [IPv6:::1]) by sandelman.ca (Postfix) with ESMTP id E3E601DC; Thu, 20 Apr 2023 10:12:48 -0400 (EDT) From: Michael Richardson To: 'starlink' , "e-impact@ietf.org" In-Reply-To: References: <1272.1681406523@localhost> <8151.1681416108@localhost> <24341.1681947286@localhost> <4f0fa01d97325$3f72e9a0$be58bce0$@evslin.com> X-Mailer: MH-E 8.6+git; nmh 1.7+dev; GNU Emacs 27.1 X-Face: $\n1pF)h^`}$H>Hk{L"x@)JS7<%Az}5RyS@k9X%29-lHB$Ti.V>2bi.~ehC0; <'$9xN5Ub# z!G,p`nR&p7Fz@^UXIn156S8.~^@MJ*mMsD7=QFeq%AL4m Subject: Re: [Starlink] DataCenters in Space (was Re: fiber IXPs in space) X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Apr 2023 14:12:51 -0000 --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Ulrich Speidel wrote: > Where do I even start? The lack of substantial bandwidth between space > and ground? The extra latency between ground and space compared to > terrestrial cloud, especially as terrestrial cloud edge can move much > closer to customers when space can't? The fact that every LEO satelli= te > is both a few 100 km from every customer and out of the customer's > range depending on when you look? That low temperatures in space don't > mean superconductive chips that produce zero heat, and that that heat > is difficult to get rid of in space? That generating power in space is > orders of magnitude more expensive than on the ground? Oh, yeah, you are totally right on all of these points. * Not all DC processing is user-facing though! * Some are just pure compute loads. * Some of the customers for these DCs might be in space in the future. > Just because Starlink can provide a service somewhere between DSL and > low to medium grade fibre to a few million around the globe it's not > "done". Even with 10x the number of satellites and a couple of times > the current capacity per satellite, Starlink isn't going to supply mo= re > than a couple of 100 million at best, and that's not even accounting > for growth in demand from IOT... Agreed. I think that the useful/interesting result of this effort will be a peer-reviewed model with some parameters that can be plugged into. At 2025 prices, space-DC might not be useful. Perhaps at 2035 prices, the balance might change. =2D- Michael Richardson . o O ( IPv6 I=C3=B8T consulti= ng ) Sandelman Software Works Inc, Ottawa and Worldwide --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQFKBAEBCgA0FiEEbsyLEzg/qUTA43uogItw+93Q3WUFAmRBSGAWHG1jcitpZXRm QHNhbmRlbG1hbi5jYQAKCRCAi3D73dDdZeKGB/9BXJAn6OlIgh/AfUPeVfmQAi03 ePghElYhlYutpCgDF+f6sRWQecNwgUt2K7NuFk1mvBjR71PBS9XfRiaNBa4VDbyo 80HjXqXI0A0JlmbXkiXjxsHU/RX3vya/SI65RoBg0tT51MAsNk4yzmo95eJLUlIV 47UMXhOJLlzIShJ+pefW2DEwOzYIPiTX0PQpuUPmboInJb+khFGAhSboo4VGBagu VBwY70IBwem+fYUA7Bj9TBOGTnfv7ihxAKgtPRYmlhRFIUZu37pDtrIdMHLxNRhS TIQB0Z36u00/392tonvTDxgTpIzhjrlqZ9VmwQvs6QJOuegKjqFuBkL27uXr =JmMt -----END PGP SIGNATURE----- --=-=-=--