Date: Sat, 25 Jun 2011 22:53:31 +0900
ZDNet UKの Google Urs Hölzle博士, Google Fellow, Senior Vice President of
"Google: 'At scale, everything breaks'"
22 June, 2011, ZDNet UK
Q:"What are Google's plans for the evolution of its internal
Urs Hölzle: "There's obviously an evolution. For example, most
applications don't use [Google File System (GFS)] today. In fact,
we're phasing out GFS in favour of the next-generation file system
that is very similar, but it's not GFS anymore. It scales better and
has better latency properties as well. I think three years from now
we'll try to retire that because flash memory is coming and faster
networks and faster CPUs are on the way and that will change
how we want to do things"
Q:"In your role, what is the most captivating technical problem you
"I think the big challenges haven't changed that much. I'd say that
it's dealing with failure, because at scale everything breaks no matter
what you do and you have to deal reasonably cleanly with that and try
to hide it from the people actually using your system."
"We use tapes, still, in this age because they're actually a very
cost-effective way as a last resort for Gmail. The reason why we put
it in is not physical data loss, but once in a blue moon you will have
a bug that destroys all copies of the online data and your only
protection is to have something that is not connected to the same
software system, so you can go and redo it."
Urs Hölzle, Google Research
"Google apps split with Google File System"
23rd June 2011, The Register
[san-tech] "High Performance Datacenter Networks: Architectures, Algorithms, and Opportunities", Dennis Abts, Google. 2011 (115 Page)
[san-tech] "The Datacenter as a Computer", L. Barroso and U. Hoelzle, Google
> "The Datacenter as a Computer:
> An Introduction to the Design of Warehouse-Scale Machines",
> Synthesis Lectures on Computer Architecture, 2009,
> Luiz Andre Barroso and Urs Hölzle, Google Inc.
> PDF (120ページ！、無償公開)
Synthesis Lectures on Computer Architecture
Morgan & Claypool Publishers
※どれが無償公開か明記されていません (多分 Google関連 2冊だけ無償)。