428:"for bringing about innovations and radical efficiencies in data center technology and increasing corporate purchasing of renewable energy" and for "not only accelerating Google’s sustainability, also cutting a path for other companies to follow suit.” While purchases initially were small, they created a market for corporate renewable energy purchases that has become very influential in driving the overall growth of renewable energy purchases. For example, SP Global reports that the top
42:
336:. In 2021, this work was recognized by the ACM SIGCOMM Networking Systems Award. The internal data flow, or network, is distinct from the one that connects users to Google services (Search, Gmail, YouTube, etc.). In the process of describing the new network, Hölzle also confirmed more about Google's making of its own networking equipment like
281:. Now in its third edition, the book is the most downloaded textbook at Morgan Claypool and is widely used in undergraduate and graduate Computer Science education. For his contributions to the design, operation, and energy efficiency of large-scale data centers, Hölzle was elected into the National Academy of Engineering in 2013.
436:
renewable energy every hour of every day. As of 2022, seven Google datacenter regions reached 90% or more carbon-free energy, and thirteen reached more than 85%. Hölzle has widely been credited for favoring market based approaches, discouraging proprietary paths that would only benefit Google. As a result, organizations like the
820:
Singh, Arjun; Ong, Joon; Agarwal, Amit; Anderson, Glen; Armistead, Ashby; Bannon, Roy; Boving, Seb; Desai, Gaurav; Felderman, Bob; Germano, Paulie; Kanagala, Anand; Provost, Jeff; Simmons, Jason; Tanda, Eiichi; Wanderer, Jim (2015). "Jupiter Rising: A Decade of Clos
Topologies and Centralized Control
491:
instituted Google's practice of code reviews for every change, the culture of using blameless postmortems to learn from mistakes rather than find out whose fault it was, and a focus on using technical interviews to identify the best candidates. He recruited many of Google's early engineers, including
435:
In 2017 Google reached enough renewable energy to offset 100% of its usage and now is the world's largest corporate buyer of renewable energy. After reaching 100% renewables at an annual average level, Google has pursued an additional focus on 24/7 carbon free energy, i.e., actually running on 100%
254:
In 1999 he joined Google and became its first Vice
President of Engineering later that year and influenced Google's corporate and engineering culture. While he led various areas during the early years of the company, including operations, search, and Gmail, he is best known for his work leading the
490:
As Google's eighth employee and its first VP of
Engineering, Hölzle shaped much of Google's development processes and infrastructure. In a book about the early days of Google, Doug Edwards credits him with defining much of Google's engineering and corporate culture. For example, he is said to have
198:
software engineer and technology executive. As Google's eighth employee and its first VP of
Engineering, he has shaped much of Google's development processes and infrastructure, as well as its engineering culture. His most notable contributions include leading the development of fundamental cloud
509:
In July 2021 he was criticised for a perceived 'hypocritical' approach to remote working; opposing it strongly for others, while relocating to New
Zealand. However, shortly after Hölzle's transfer was announced, Google approved the large majority of employee applications, permitting 8,500 other
199:
infrastructure such as energy-efficient data centers, distributed compute and storage systems, and software-defined networking. Until July 2023, he was the Senior Vice
President of Technical Infrastructure and Google Fellow at Google. In July 2023, he transitioned to being a Google Fellow only.
344:
for G-Scale; and said the company wanted, by being open about the changes, to "encourage the industry — hardware, software and ISP's — to look down this path and say, 'I can benefit from this.'" He said network utilization was nearing 100% of capacity, a dramatic efficiency improvement.
1291:
Ranganathan, Parthasarathy; Stodolsky, Daniel; Calow, Jeff; Dorfman, Jeremy; Guevara, Marisabel; Smullen IV, Clinton Wills; Kuusela, Aki; Balasubramanian, Raghu; Bhatia, Sandeep; Chauhan, Prakash; Cheung, Anna; Chong, In Suk; Dasharathi, Niranjani; Feng, Jia; Fosco, Brian (2021-04-17).
263:
he designed the initial distributed architecture for Google. This work was recognized by the
Association for Computing Machinery who named him a Fellow for the design, engineering and operation of energy efficient large-scale cloud computing systems. He is also credited for creating
300:
which argued that servers should be designed to use power in proportion to their current load, because they spend much of their time being only partially loaded. This paper is often credited for spurring CPU manufacturers to make their designs much more energy efficient. Today,
292:
which aimed to halve the power consumption of desktop computers and servers. In 2012, after mobile computing and enhanced awareness of datacenter energy costs had contributed to significant improvements in energy efficiency, CSCI merged with the Green Grid consortium.
380:
Hölzle is credited with leading the creation of Google's internal cloud, including architecting clusters based on commodity servers, distributed file systems, cluster scheduling, software defined networking, hardware reliability, processor design, custom ASICs for AI
408:
projects. In the same year, Google started the RE<C initiative ("Renewable Energy less than (cheaper than) coal") to develop cheaper forms of renewable energy, but four years later Hölzle announced the end of that strategy, dropping development of
276:
He led the design of Google's efficient data centers which are said to use less than half the power of a conventional data center. In 2014 he received The
Economist's Innovation Award for his datacenter efficiency work. With Luiz Barroso, he wrote
1885:
1180:
Singh, Arjun; Ong, Joon; Agarwal, Amit; Anderson, Glen; Armistead, Ashby; Bannon, Roy; Boving, Seb; Desai, Gaurav; Felderman, Bob; Germano, Paulie; Kanagala, Anand; Provost, Jeff; Simmons, Jason; Tanda, Eiichi; Wanderer, Jim (2015-08-17).
1140:
Jain, Sushant; Kumar, Alok; Mandal, Subhasree; Ong, Joon; Poutievski, Leon; Singh, Arjun; Venkata, Subbaiah; Wanderer, Jim; Zhou, Junlan; Zhu, Min; Zolla, Jon; Hölzle, Urs; Stuart, Stephen; Vahdat, Amin (2013-08-27).
501:
Hölzle also influenced Google's office culture by bringing his dog Yoshka to work. In 2004 Yoshka even "authored" a blog post, and today Google declares itself a "dog company". The cafe in
Building 43 of the
106:
2023:
451:
In 2022, Hölzle was revealed as the primary investor behind the New
Zealand based solar developer Helios which aims to build about 10 grid-connected solar farms across New Zealand.
313:
Starting in 2005, Hölzle's team began to develop datacenter networking hardware because off-the-shelf network equipment could not scale to the demands of large data centers. Using
866:
2033:
475:
891:
Jain, Sushant; Kumar, Alok; Mandal, Subhasree; Ong, Joon; Poutievski, Leon; Singh, Arjun; Venkata, Subbaiah; Wanderer, Jim; Zhou, Junlan; Zhu, Min; Zolla, Jon (2013-08-27).
700:
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Starting in 2010, Google began buying renewable energy from new wind and solar farms to cover the energy needs for all its datacenters. In 2017, Hölzle received the
1490:
1104:
1059:
Verma, Abhishek; Pedrosa, Luis; Korupolu, Madhukar R.; Oppenheimer, David; Tune, Eric; Wilkes, John (2015). "Large-scale cluster management at Google with Borg".
575:
396:
in 2016. Hölzle is also credited with changing Google Cloud's engineering culture to "to make the transition from niche cloud to enterprise class cloud".
1539:
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Google's internal cloud doesn't use virtualization, but product development on an external cloud platform started in 2014, leading to the launch of the
1929:
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topologies based on commodity switch chips, these datacenter networks scaled from an initial 10 Tbit/s to 1,000 Tbit/s a decade later.
807:
1313:
842:
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He was known for his self-deprecating humor; for example, his initial job title was Search Engine Mechanic "because everything was broken".
1712:
479:
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321:, today this approach is standard for large datacenter networks; virtually all hyperscale datacenter operators use similar approaches.
2003:
1337:
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in 2013 for contributions to the design, operation, and energy efficiency of large-scale data centers. He also is a Fellow of the
1454:
603:
467:
1298:
Proceedings of the 26th ACM International Conference on Architectural Support for Programming Languages and Operating Systems
236:
1242:
562:
404:
In 2007, Hölzle announced that Google would be carbon neutral starting that year, using individually selected and monitored
302:
255:
infrastructure systems underpinning Google's applications, and for their focus on both efficiency and scalability. With
1909:
1409:
349:
576:"Urs Hölzle on LinkedIn: I wanted to share some thoughts on becoming an engineer again after having… | 112 comments"
2018:
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332:, an open source software system jointly devised by scientists at Stanford and the UC Berkeley and promoted by the
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2008:
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2013:
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385:) and vide processing, and many more. One of the most notable events from this period was the emergence of
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382:
149:
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96:
1588:
1410:"Google cans concentrated solar power project | REVE News of the wind sector in Spain and in the world"
260:
1998:
429:
232:
1515:
1183:"Jupiter Rising: A Decade of Clos Topologies and Centralized Control in Google's Datacenter Network"
930:
414:
228:
208:
74:
251:, acquired by Sun's JavaSoft unit in 1997 and from there became Sun's premier JVM implementation.
1491:"Global corporate clean energy procurement crosses 50 GW with Asia as the largest region in 2022"
1319:
1098:
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432:(Amazon, Google, Meta, Microsoft) accounted for over 40% of contracted capacity during 2017-22.
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https://static.googleusercontent.com/media/www.google.com/en//green/pdfs/renewable-energy.pdf
417:) because it was not keeping pace with the rapid price decline of another solar technology –
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714:"The Datacenter as a Computer: An Introduction to the Design of Warehouse-Scale Machines"
352:, creating or contributing to key building blocks used in many networks today, including
235:
and their efficient implementation. Via a startup founded by Hölzle, David Griswold, and
150:
Adaptive optimization for Self: Reconciling High Performance with Exploratory Programming
1978:
324:
In 2012, Hölzle introduced "the G-Scale Network" on which Google had begun managing its
666:
341:
279:
The Datacenter as a Computer: An Introduction to the Design of Warehouse-Scale Machines
1963:
1797:"Site Reliability Engineering, Chapter 15 - Postmortem Culture: Learning from Failure"
1736:
824:
Proceedings of the 2015 ACM Conference on Special Interest Group on Data Communication
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867:"Introducing data center fabric, the next-generation Facebook data center network"
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now focus on enabling any company to pursue their own carbon-free energy goals.
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1930:"Bloomberg - Google Approves Most Staff Requests to Relocate or Work Remotely"
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1300:. New York, NY, USA: Association for Computing Machinery. pp. 600–615.
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955:"Going With the Flow: Google's Secret Switch to the Next Wave of Networking"
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1294:"Warehouse-scale video acceleration: Co-design and deployment in the wild"
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Hölzle became a Fulbright scholar in 1988 and was elected a member of the
1983:
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1431:"Google inks 20-year deal to buy wind power for data centers | InfoWorld"
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1639:"Is '24/7 carbon-free energy' the new gold standard of decarbonisation?"
244:
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Data Center Knowledge | News and analysis for the data center industry
1222:
Pinheiro, Eduardo; Weber, Wolf-Dietrich; Barroso, Luiz André (2007).
143:
136:
531:[Urs Hölzle: "Google is becoming more and more efficient"].
1713:"Top Google exec backs $ 1.3 billion investment in NZ solar power"
1228:
5th USENIX Conference on File and Storage Technologies (FAST 2007)
58:
1338:"All I really need to know I learned from co-founding Kubernetes"
1386:"Philanthropy Programs for Underserved Communities - Google.org"
1062:
Proceedings of the Tenth European Conference on Computer Systems
357:
445:
441:
1910:"Google's 'hypocritical' remote work policies anger employees"
1589:"Aiming to Achieve Net-Zero Emissions - Google Sustainability"
1143:"B4: experience with a globally-deployed software defined wan"
893:"B4: experience with a globally-deployed software defined wan"
353:
1861:"Working from home is ruff. Dooglers make it a little better"
305:
has become a standard goal for both server and mobile uses.
227:
scholarship that same year. In 1994, he earned a Ph.D. from
604:"Google Cloud infrastructure head Urs Hölzle stepping down"
1540:"Tech giants power record surge in renewable energy sales"
1385:
973:"Web Search for a Planet: The Google Cluster Architecture"
629:"Web search for a planet: The Google cluster architecture"
219:. He received a master's degree in computer science from
971:
Barroso, Luiz Andre; Dean, Jeffrey; Hölzle, Urs (2003).
437:
2024:
2009 fellows of the Association for Computing Machinery
1267:
1243:"Brawny cores still beat wimpy cores, most of the time"
1002:
808:"Server Efficiency: Aligning Energy Use With Workloads"
529:"Urs Hölzle: "Google devient de plus en plus efficace""
506:
is named Yoshka's Cafe in honor of Google's first dog.
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for vendor-neutral, model-driven network management;
369:
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128:
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80:
66:
51:
32:
1613:"How carbon-free energy around the clock can work"
627:Barroso, L.A.; Dean, J.; Holzle, U. (March 2003).
243:), that work then evolved into a high-performance
1224:"Failure Trends in a Large Disk Drive Population"
931:"SIGCOMM Networking Systems Award | acm sigcomm"
1820:magazin, Andrea Rungg, manager (16 July 2015).
1762:, Association for Computing Machinery webpage.
1028:"Google Remakes Online Empire With 'Colossus'"
784:"The Green Grid and Climate Savers Will Merge"
8:
1845:: CS1 maint: multiple names: authors list (
298:"The Case for Energy Proportional Computing"
718:Synthesis Lectures on Computer Architecture
348:Google's teams also heavily contributed to
2034:Winners of The Economist innovation awards
1822:"Urs Hölzle: Googles Mitarbeiter Nummer 8"
1688:"Tracking Our Carbon-Free Energy Progress"
1516:"Clean Energy: Renewable Energy Milestone"
1103:: CS1 maint: location missing publisher (
40:
29:
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1187:ACM SIGCOMM Computer Communication Review
1147:ACM SIGCOMM Computer Communication Review
1070:
897:ACM SIGCOMM Computer Communication Review
832:
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712:Barroso, Luiz André; Hölzle, Urs (2009).
597:
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296:Also in 2007, he and Luiz Barroso wrote
1120:OpenFlow @ Google - Urs Hoelzle, Google
961:, April 17, 2012. Retrieved 2012-04-17.
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217:University of California, Santa Barbara
133:University of California, Santa Barbara
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1565:"100% renewable is just the beginning"
1096:
810:, Datacenter Knowledge, June 12, 2012
767:
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565:, Doug Edwards, Houghton Mifflin 2012
207:Before joining Google, Hölzle was an
189:
7:
1886:"Yoshka's · Mountain View, CA 94043"
558:
556:
554:
510:employees to work remotely as well.
480:Swiss Academies of Arts and Sciences
319:Initially esoteric and kept a secret
1711:Pullar-Strecker, Tom (2022-04-18).
1065:. Bordeaux, France. pp. 1–17.
472:Association for Computing Machinery
286:Climate Savers Computing Initiative
1890:Yoshka's · Mountain View, CA 94043
1362:"Carbon neutrality by end of 2007"
25:
821:in Google's Datacenter Network".
731:10.2200/S00193ED1V01Y200905CAC006
527:Seydtaghia, Anouch (2022-06-19).
547:from the original on 2023-09-20.
413:" electricity (for example with
284:In June 2007, he introduced the
231:, where his research focused on
1268:"Energy proportional computing"
468:National Academy of Engineering
446:24/7 Carbon-Free Energy Compact
1960:– Biography at Google Research
1784:Full members>Hölzle, Dr Urs
389:, a project funded by Hölzle.
328:-scale internal data flow via
268:for April Fool's Day in 2005.
1:
1637:Gordon, Oliver (2022-11-03).
303:energy proportional computing
1737:"Urs Hölzle | Leaders | WWF"
454:He is a board member of the
438:Clean Energy Buyers Alliance
701:Economist, December 6, 2014
350:software-defined networking
55:1964 (age 59–60)
2050:
1760:ACM Fellows>Urs Hoelzle
602:Miller, Ron (2023-07-12).
334:Open Networking Foundation
223:in 1988 and was awarded a
2004:Swiss computer scientists
1667:World Resources Institute
1663:"24/7 Carbon-Free Energy"
690:Google's Green Datacenter
444:, and the United Nations
176:
121:
39:
1984:Climate Savers Computing
272:Data centers and servers
27:Swiss computer scientist
1306:10.1145/3445814.3446723
1200:10.1145/2829988.2787508
1159:10.1145/2534169.2486019
1072:10.1145/2741948.2741964
989:10.1109/MM.2003.1196112
909:10.1145/2534169.2486019
834:10.1145/2785956.2787508
645:10.1109/MM.2003.1196112
1979:100% Renewable in 2017
1826:www.manager-magazin.de
772:> NAE press release
750:www.morganclaypool.com
456:US World Wildlife Fund
364:for data interchange,
191:[ˈʊrsˈhœltslɛ]
1692:Google Sustainability
1569:Google Sustainability
1520:Google Sustainability
1467:"C.K. Prahalad Award"
442:European 24/7 CFE Hub
394:Google Cloud Platform
368:for tracing, and the
233:programming languages
187:German pronunciation:
97:Google Cloud Platform
1974:Google's Datacenters
1453:Google's Green PPAs
1366:Official Google Blog
1003:"Google File System"
871:Facebook Engineering
827:. pp. 183–197.
746:"- Most Read Papers"
1964:Peeking into Google
1741:World Wildlife Fund
563:"I'm Feeling Lucky"
415:BrightSource Energy
229:Stanford University
209:associate professor
75:Stanford University
1412:. 24 November 2011
400:Environmental work
194:; born 1964) is a
2019:ETH Zurich alumni
1772:AAAS 2017 Fellows
1435:www.infoworld.com
1315:978-1-4503-8317-2
844:978-1-4503-3542-3
426:CK Prahalad Award
180:
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123:Scientific career
115:Fulbright Scholar
46:Urs Hölzle (2014)
16:(Redirected from
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2009:Google employees
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478:(2017), and the
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171:John L. Hennessy
162:Doctoral advisor
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1936:. 3 August 2021
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