Martin Kleppmann @martinkl Twitter profile

Pinned Tweet

Martin Kleppmann

8 months

I’m no longer active on Twitter. Find me at on Bluesky, or on Mastodon. If I follow you here or know you personally, you can DM me for a Bluesky invitation code. (Sorry, don’t have enough invitation codes for people I don't know.)

3

2

18

Last Seen Profiles

@alyblod2

@9Skey

@martindelp

@pormax_7n

@jandakembangstw

@09ValentinaC

@bokeplokalmalam

@AlexKale17

@stwmaniax

@poneyringa

@angelagindri43

@DegranIyl

@hamdaayed1965

@nishiayaayaaya

@asoo45648927

@tzarovic

@LaraleIsabel

@aka3kan

@DawnOfEve_

@RomeovilleToday

@ShipsLucia

@PIKUi7_

@PecintaStwIbu1

@WindySaputrii1

@abdncolorectal

@Silicoviel

@stiffmybody

@doublerthr3

@pengen_stw

@Roninho__10

@stwmaniax

@ptDMishra

@bddis8z

@RUKI_LIT0816

@HxHxUpNext

@dirseguedir

Martin Kleppmann

@martinkl

4 years

In 1665, the University of Cambridge temporarily closed due to the bubonic plague. Isaac Newton had to work from home, and he used this time to develop calculus and the theory of gravity.

310

8K

16K

Martin Kleppmann

@martinkl

3 years

The G7 summit should be followed by a C major summit to resolve everything.

64

930

5K

Martin Kleppmann

@martinkl

4 years

✨New educational materials!✨ Today I'm announcing two new, free resources I've written: an 8-lecture course on fundamentals of distributed systems, and a 30-page tutorial on elliptic curve cryptography.

29

475

2K

Martin Kleppmann

@martinkl

1 year

My partner and I had a baby! I’m on parental leave for the next 3 months (plus planning to work part-time for a while later). Therefore I probably won’t be tweeting much. Feeling fortunate to be in a place with good maternity care and generous parental leave ❤️

91

3

1K

Martin Kleppmann

@martinkl

6 years

Pro tip: instead of paying $399/year for @safari books online (frankly outrageous), you can get ACM professional membership for $99/year, which includes Safari access.

42

317

1K

Martin Kleppmann

@martinkl

6 years

I passed my PhD viva (aka thesis defence) yesterday. Yay! 👨‍🎓😎🎉

79

8

1K

Martin Kleppmann

@martinkl

1 year

This looks like a great resource – a series of distributed systems programming challenges designed by Kyle Kingsbury aka aphyr

Fly.io Distributed Systems Challenge

Documentation and guides from the team at Fly.io.

fly.io

3

195

986

Martin Kleppmann

@martinkl

3 years

My partner is learning programming. When she struggles to figure something out, but I can solve it in a few seconds, I remind her: she can sit at the piano and easily sight-read a piece she’s never seen, while I have to struggle through note by note. Skills require practice.

13

66

967

Martin Kleppmann

@martinkl

4 years

Happy new year 🥂 Ever wondered where the western musical scales come from, and why there are 12 notes in an octave? I wrote up a quick explainer.

19

166

956

Martin Kleppmann

@martinkl

6 years

Estimated number of clock cycles it takes to do various things on a modern CPU, e.g. atomic CAS or context switch: — useful for a concurrent systems course I'm currently teaching

Infographics: Operation Costs in CPU Clock Cycles

Infographics: operation cost in cycles (from <1 cycle for ADD/XOR/... to up to a million for a thread context switch)

ithare.com

9

402

943

Martin Kleppmann

@martinkl

4 years

I am concerned that a lot of computer systems research is solving problems that only huge tech companies have (eg. fast datacenter networking, big data analytics systems), rather than working on technologies that empower individual users and the underprivileged.

Arvind Narayanan

@random_walker

4 years

By the same token, it should be a sobering moment for computer science academia. With few exceptions, work that tries to bring accountability to big tech companies is relegated to the fringes of our discipline. CS these days cozies up to power far more than speaking truth to it.

5

125

477

17

243

936

Martin Kleppmann

@martinkl

2 years

Very excited to announce that I've been awarded a €1.3m grant to start a research group on local-first software at TU Munich @TU_Muenchen ! This will enable us to build the foundation for collaboration software of the future.

56

83

926

Martin Kleppmann

@martinkl

2 years

Hello Munich! I have moved here from Cambridge and will be starting a new position at @TU_Muenchen in October. Excited!

42

16

904

Martin Kleppmann

@martinkl

4 years

Over 100,000 copies of my book @intensivedata have now been sold. In this blog post I examine some of the economics of book-writing

59

134

901

Martin Kleppmann

@martinkl

6 years

Such an amazing slide deck by @deniseyu21 on why distributed systems are so hard

6

407

852

Martin Kleppmann

@martinkl

3 years

I give away lots of work for free: conference talks, educational videos, research papers, open source code, blog posts. If you want me to continue doing this, please consider supporting me on Patreon! Thanks ✨ ➡️ Blog post:

creating research and teaching on distributed systems

www.patreon.com

24

174

680

Martin Kleppmann

@martinkl

6 years

Philosophiae Doctor

55

7

665

Martin Kleppmann

@martinkl

5 years

Netflix have made their own Change Data Capture (CDC) tool for MySQL and PostgreSQL… though maybe it would have been better to contribute to @debezium ?

DBLog: A Generic Change-Data-Capture Framework

Andreas Andreakis, Ioannis Papapanagiotou

netflixtechblog.com

19

189

646

Martin Kleppmann

@martinkl

4 years

lol, thank you hacker news for the thoughtful critique 🙄

61

26

638

Martin Kleppmann

@martinkl

5 years

My book @intensivedata is apparently the second-best-selling book across @OReillyMedia 's entire book catalog in 2019. Delighted that so many people are finding it useful!

28

45

631

Martin Kleppmann

@martinkl

2 years

How amazing is it that GPS actually works? Satellites are at least 20,000 km away; measuring the distance to ~2m accuracy means 0.00001% error. Also the satellite is moving at 3 km/sec and the measurement equipment fits in your phone. What other consumer device has such accuracy?

15

36

609

Martin Kleppmann

@martinkl

3 years

I was asked to give a keynote at the ACM Conference on Distributed and Event-based Systems ( @ACM_DEBS ). So I tried to summarise everything I know about events in 50 minutes! 🎥 📄 Hope you enjoy it ✨

Thinking in Events: From Databases to Distributed Collaboration...

Keynote by Martin Kleppmann at the 15th ACM International Conference on Distributed and Event-based Systems (ACM DEBS 2021)Paper: https://dl.acm.org/doi/10.1...

www.youtube.com

12

138

592

Martin Kleppmann

@martinkl

1 year

Google's Service Weaver claims that it can hide the difference between RPC and local method calls. Just like CORBA claimed in 1991. Is it different this time? The docs say barely a word about handing failures, such as RPCs timing out

31

85

582

Martin Kleppmann

@martinkl

7 years

Forgive my self-indulgence for a second… I walked into Heffers in Cambridge, and guess what I found there on the shelf? 😎

25

41

569

Martin Kleppmann

@martinkl

4 years

Apparently I’ve now crossed 30k followers... hello everybody and welcome! 👋 What are you hoping to hear about? Is miscellaneous distributed systems geekery good? 😊

53

4

558

Martin Kleppmann

@martinkl

7 years

Never before have I been sooo excited to see a pile of paper!! 😆📚😄🐗 @intensivedata

41

78

548

Martin Kleppmann

@martinkl

4 years

I finally got round to reading @ifesdjeen 's Database Internals. It's a nice book! If you enjoyed @intensivedata and want more detail on certain topics (especially storage engines and consensus), it's a good follow-on read.

6

103

546

Martin Kleppmann

@martinkl

2 years

I have officially started at @TU_Muenchen as of this week! Over the coming months and years I will be building up a research group to focus on local-first software ✨🧑‍🔬

19

23

543

Martin Kleppmann

@martinkl

4 years

Today in “distributed systems are hard”: I wrote down a simple CRDT algorithm that I thought was “obviously correct” for a course I’m teaching. Only 10 lines or so long. Found a fatal bug only after spending hours trying to prove the algorithm correct. 😭

9

38

528

Martin Kleppmann

@martinkl

4 years

New video! “CRDTs: The Hard Parts” 🎥 This talk explains several new research results in CRDTs, including problems in some published algorithms, weird edge cases, and work we’re doing to improve performance.

CRDTs: The Hard Parts

A talk on the latest research on CRDTs, originally given at the Hydra distributed computing conference on 6 July 2020.References: https://martin.kleppmann.co...

www.youtube.com

3

148

507

Martin Kleppmann

@martinkl

5 years

Our article “Online Event Processing: Achieving consistency where distributed transactions have failed”, with @arberesford and @bsvingen : Now in print in the latest edition of @CACMmag : (paywall) and online in @ACMQueue : (free)

7

170

483

Martin Kleppmann

@martinkl

4 years

The distributed systems course covers many of the fundamental algorithms behind today's apps. It consists of 87 pages of detailed notes (including exercises) and 7 hours of lecture videos

Distributed Systems lecture series

Accompanying lecture notes: https://www.cl.cam.ac.uk/teaching/2122/ConcDisSys/dist-sys-notes.pdf These videos form an 8-lecture series on distributed systems...

www.youtube.com

9

121

466

Martin Kleppmann

@martinkl

4 years

To all interested in CRDTs: Marc Shapiro, @anne_biene and I have set up a little CRDT community website. Lots of links to papers, blog posts, talks, and implementations. Contributions welcome!

About CRDTs • Conflict-free Replicated Data Types

Resources and community around CRDT technology — papers, blog posts, code and more.

crdt.tech

6

195

459

Martin Kleppmann

@martinkl

3 years

✨ New article: Peritext, a CRDT for rich-text collaboration 📄 This one was hard work. We went through at least half a dozen algorithm designs until we found one that worked! Joint work with @geoffreylitt @sliminality and @pvh at @inkandswitch

Peritext: A CRDT for Rich-Text Collaboration

Collaboration on rich text is hard to model with plain-text approaches. We review the challenges and how to construct a CRDT for rich text.

www.inkandswitch.com

7

115

429

Martin Kleppmann

@martinkl

6 years

Can't believe my talk “Turning the database inside out” (from 4 years ago) has been watched almost 100,000 times!

"Turning the database inside out with Apache Samza" by Martin...

Databases are global, shared, mutable state. That's the way it has been since the 1960s, and no amount of NoSQL has changed that. However, most self-respecti...

www.youtube.com

14

44

392

Martin Kleppmann

@martinkl

6 years

Over 50,000 copies of my book @intensivedata have been sold. I can’t believe it! Thank you everyone who has helped spread the word about it.

24

36

388

Martin Kleppmann

@martinkl

2 years

This book on PostgreSQL internals looks like a great resource on isolation levels, concurrency control, and various storage engine topics

PostgreSQL 14 Internals

Postgres Professional is a PostgreSQL company delivering Postgres Pro DBMS and all kinds of PostgreSQL professional services worldwide

postgrespro.com

5

72

386

Martin Kleppmann

@martinkl

6 years

Such a powerful idea; keeps getting reinvented under different names (event sourcing; lambda/kappa architecture; database inside-out/unbundled; state machine replication; etc).

Neil Conway

@neil_conway

6 years

Reflecting on the fact that I've built some flavor of the "immutable, append-only log + materialized views" pattern into every non-trivial software project I've built since 2006.

8

34

207

9

140

382

Martin Kleppmann

@martinkl

3 years

Was Base64 intentionally designed so that encoding all zeroes looks like screaming into the void? AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

4

33

384

Martin Kleppmann

@martinkl

3 years

This is mind-blowingly clever work by @justinetunney . A single binary that runs natively on Windows/Linux/Mac/*BSD without any VM, implementing a web server that serves the content of a zip archive stored in the binary itself! 🤯🤯👏👏

8

109

375

Martin Kleppmann

@martinkl

5 years

Kafka is inching ever closer to being a database, and I think this is pretty cool. Subscribe to a query, and get notified when its results change.

Jay Kreps

@jaykreps

5 years

We think this is a big step in making stream processing easier. I'm really excited about it.

9

189

510

8

107

377

Martin Kleppmann

@martinkl

3 years

I see parallels between musical instrument skills and programming skills. Many people learn them in their youth, but both are totally learnable as adults if you’re willing to put in the many hours of practice they require. It’s not natural talent, it’s persistence that matters.

12

37

371

Martin Kleppmann

@martinkl

2 years

Folks moving to Mastodon are swapping a service run by a capricious egomaniac for one where the admin of your home instance controls everything about your account. And you probably don't know what your server admin is like when you sign up. Is this really much better?

30

53

365

Martin Kleppmann

@martinkl

2 years

The picture is from "General Zoology" by George Shaw, vol. ii, part 2, page 458, published in 1801. It's even on the Internet Archive!

» teej

@teej_m

2 years

I thought these were drawn exclusively for O’Reilly. My whole life is a lie.

375

4K

36K

6

47

366

Martin Kleppmann

@martinkl

5 years

My student's experimental new database beats MySQL by approximately 700% on the TPC-C benchmark in initial tests. This research is going somewhere interesting!

10

36

343

Martin Kleppmann

@martinkl

2 years

I took a look at a GCSE Computing exam paper (an exam that 16-year-olds sit in the UK). It made me sad how dull, arbitrary, and pointless many of the questions are. Not appropriate for beginners. Surely this sort of material will put many kids off going into computing.

21

57

334

Martin Kleppmann

@martinkl

4 years

Nice blog post by @davex_tech summarising the discussion around “Is Kafka a database?”, and when to use streams versus when to use a relational DB.

Kafka As A Database? Yes Or No – A Summary Of Both Sides

Should you use Kafka as a database? The popularity of stream-focused architectures has risen in popularity—is it right for your software?

davidxiang.com

7

82

323

Martin Kleppmann

@martinkl

2 years

When users enter sensitive data into an app (eg. period trackers) and it’s stored unencrypted in the cloud, the app developer looks increasingly irresponsible. Local-only or local-first software with p2p data sync and/or end-to-end encryption needs to become the default.

matt blaze

@mattblaze

2 years

The central server design, on the other hand, puts EVERYONE's data in one place. And someone might obtained it hacking into the app's servers, by buying it from them, or by serving them with a legal order to turn it over. Any of these could happen without users' knowledge. 7/

2

7

49

8

78

315

Martin Kleppmann

@martinkl

4 years

I set myself a goal of not working weekends (which I used to do regularly). Looking at my GitHub activity, it seems like I've been doing okay. Hooray for avoiding burnout!

3

7

322

Martin Kleppmann

@martinkl

7 years

New paper! 📓 “Verifying Strong Eventual Consistency in Distributed Systems” — checking CRDTs with a theorem prover 😎

Verifying Strong Eventual Consistency in Distributed Systems

Data replication is used in distributed systems to maintain up-to-date copies of shared data across multiple computers in a network. However, despite decades of research, algorithms for achieving...

arxiv.org

3

138

317

Martin Kleppmann

@martinkl

6 years

This thoughtful article by @martinfowler on the pros and cons of remote working is made even better by featuring a tortoise on a rocket-powered skateboard 🐢🔥

2

148

312

Martin Kleppmann

@martinkl

3 years

Every technology contributes to determining who has what power. Therefore, every technology is political. If a technology seems apolitical, that probably just means that it supports the incumbents and doesn’t challenge the status quo. Likewise, every organisation is political.

11

67

314

Martin Kleppmann

@martinkl

6 years

The energy cost of a single Bitcoin transaction is about 300kWh. The same amount of energy will let you drive 1,000 miles in a car!

26

205

303

Martin Kleppmann

@martinkl

4 years

I have never waited more than 2 minutes to vote in an election in UK/Germany. With queues like this, voter suppression campaigns, gerrymandering, a two-party duopoly, extreme partisanship, etc. the US doesn’t really look like the shining model democracy that it was once seen as.

10

44

305

Martin Kleppmann

@martinkl

3 years

Did you know that the breadth-first-search algorithm in most textbooks is needlessly inefficient? A simple tweak can sometimes turn an O(n^2) runtime into O(n)

2

53

311

Martin Kleppmann

@martinkl

7 years

I love how the @nytimes uses a single-partition Kafka topic to store every single article they published since 1851!

Publishing with Apache Kafka at The New York Times | Confluent

This post covers how Apache Kafka and its Streams API are used for storing and processing all the articles ever published by The New York Times

www.confluent.io

6

156

298

Martin Kleppmann

@martinkl

6 years

$ npm install -g create-react-app $ create-react-app demo $ du -hs demo 158M OMG, JavaScript people, what are you doing?

18

92

301

Martin Kleppmann

@martinkl

5 years

I just shared a taxi with Leslie Lamport, but unfortunately I was too tired to have any sensible sort of conversation

10

6

295

Martin Kleppmann

@martinkl

1 year

For discussion I refer you to Waldo et al.’s classic “A Note on Distributed Computing”, which is still as true today as it was 30 years ago

6

44

297

Martin Kleppmann

@martinkl

2 years

New paper alert! 📄 Most CRDT algorithms assume that all participants correctly follow the protocol. I show that we can make CRDTs robust against Byzantine behaviour, and it's not even terribly difficult.

2

57

293

Martin Kleppmann

@martinkl

4 years

Our group’s work on CRDTs and collaboration software is built explicitly upon a philosophy of trying to shift power away from cloud providers, and back towards end users. More on this in our paper-cum-manifesto on “local-first software”

7

54

292

Martin Kleppmann

@martinkl

4 years

Modern business jargon uses the word “talent” to refer to employees. Is it just me, or is this almost as offensive as calling people “resources”? I find “talent” dehumanising, and it focuses the attention on innate characteristics rather than developing learnable skills.

20

33

285

Martin Kleppmann

@martinkl

8 years

New paper by @arberesford and me: “A Conflict-Free Replicated JSON Datatype” — we figured out a JSON CRDT

15

167

283

Martin Kleppmann

@martinkl

4 years

Proof-of-work is an abomination. Totally irresponsible.

Tony "Abolish ICE" Arcieri 🦀🌹

@bascule

4 years

Bitcoin energy consumption hits a new all time high of nearly 9GW, comparable to Chile, a country with 18M people. Carbon footprint is ~37 Mt CO2 annually, about that of New Zealand. And yet it still does ~4 transactions per second...

21

201

318

6

86

277

Martin Kleppmann

@martinkl

6 years

It’s so heartwarming when strangers come up to me and tell me how my talks/book have helped them (in designing their systems, getting a job, …) ❤️ Thank you!

20

11

282

Martin Kleppmann

@martinkl

7 years

A CRDT-based collaborative editing feature for @AtomEditor ! Exciting, CRDTs are catching on 😄

5

141

278

Martin Kleppmann

@martinkl

3 years

I just re-recorded my lecture on the Raft consensus algorithm, since the previous version had a couple of mistakes. New version here: Accompanying lecture notes:

Distributed Systems 6.2: Raft

Accompanying lecture notes: https://www.cl.cam.ac.uk/teaching/2122/ConcDisSys/dist-sys-notes.pdfFull lecture series: https://www.youtube.com/playlist?list=PL...

www.youtube.com

1

55

276

Martin Kleppmann

@martinkl

4 years

I am so delighted that “The Art of Doing Science and Engineering” by Richard Hamming (inventor of error-correcting codes and many other things) is now available in print again. Thank you @stripepress @_TamaraWinter for sending me a copy!

7

19

269

Martin Kleppmann

@martinkl

10 years

I'm writing a book called “Designing Data-Intensive Applications” for O'Reilly! @intensivedata http://t.co/4Ywa4j7SZb http://t.co/jTr7jyBc47

23

103

263

Martin Kleppmann

@martinkl

5 years

Wow. Certain SSDs have a firmware bug causing them to irrecoverably fail after exactly 32,768 hours of operation. SSDs that were put into service at the same time will fail simultaneously, so RAID won't help. 😱

4

132

269

Martin Kleppmann

@martinkl

8 years

New blog post: “How to do distributed locking”. A critique of Redis’ Redlock algorithm, and general guide to locks:

6

204

261

Martin Kleppmann

@martinkl

3 years

adding " @NotionHQ going offline, apparently due to problems renewing their Somalian (.so) domain name" to my list of reasons why local-first software is a good idea

8

20

257

Martin Kleppmann

@martinkl

4 years

Tried using AWS Lambda/API Gateway for a little side project. The getting started wizard first asks you to choose between a “REST API” and a “HTTP API” (???). Then it pre-populates the new function with broken example code that crashes when you try to run it.

20

17

257

Martin Kleppmann

@martinkl

3 years

Our paper got accepted to ACM CCS (a leading security conference) — yay! 😄😄 Going to open a nice bottle of Riesling tonight 🥂

8

5

252

Martin Kleppmann

@martinkl

7 years

Very pleased that my research grant got extended, so I'll be at Cambridge working on CRDTs for another two years 😄

TRVE DATA

@trvedata

7 years

TRVE Data update for September 2017

0

2

5

10

15

250

Martin Kleppmann

@martinkl

6 years

Slides of my talk “Is Kafka a database?” are now up here:

Is Kafka a database?

Slides from a keynote given at Kafka Summit San Francisco, 17 October 2018. http://martin.kleppmann.com/2018/10/17/kafka-summit.html Abstract: Le…

speakerdeck.com

4

95

246

Martin Kleppmann

@martinkl

6 years

“Is Kafka a Database?” That’s the (slightly provocative) title of my keynote at #kafkaSummit today. It will be live-streamed, starting at 9am Pacific Time / 5pm UK time

7

89

243

Martin Kleppmann

@martinkl

2 years

Excited to announce my latest fun project: I wrote an illustrated children's book on cryptography together with Mitch Seymour @_round_robin ! We're launching it this Thursday, and to celebrate we're doing an AMA on Reddit (4pm UK / 8am Pacific). Come join us!

5

8

241

Martin Kleppmann

@martinkl

5 years

Recording of my keynote at #KafkaSummit yesterday (“Is Kafka a database?”) is here:

Raw Livestream Keynotes | Kafka Summit London 2019

Event site: https://cnfl.io/ksldn19 | This is the raw livestream for the 2019 Kafka Summit London keynotes on May 13, 2019. ABOUT CONFLUENTConfluent, founde...

www.youtube.com

5

70

240

Martin Kleppmann

@martinkl

3 years

Happy that our paper on a move operation for CRDT trees has finally been accepted by IEEE TPDS! We've spent over two years trying to get this thing published, eventually successful on the sixth submission…

11

30

238

Martin Kleppmann

@martinkl

5 years

The talk I gave today is already online! See a live demo of using theorem-proving software to prove the correctness of a simple consensus algorithm.

Strange Loop Conf

@strangeloop_stl

5 years

Strange Loop 2019: "Correctness proofs of distributed systems with Isabelle" by Martin Kleppmann @martinkl

0

49

165

8

55

237

Martin Kleppmann

@martinkl

5 years

New article! “Local-first software: You own your data, in spite of the cloud” — a result of my long-standing collaboration with @inkandswitch .

6

103

237

Martin Kleppmann

@martinkl

4 years

New paper, which @pvh and I wrote together: “PushPin: Towards Production-Quality Peer-to-Peer Collaboration”. It's about our hard-won experience trying to build peer-to-peer local-first software using CRDTs. Very practical, lots of insights. Take a look!

2

55

227

Martin Kleppmann

@martinkl

3 years

My partner complained that she has to report her covid test result twice a week on a government website, requiring ~20 clicks plus login. So we wrote a Selenium script together to automate the whole thing, simulating clicks in a web browser. Much faster, much happier 😆

4

13

230

Martin Kleppmann

@martinkl

6 years

OMG, this is the highest rank I've seen for @intensivedata so far — #559 across all books on 🎉

20

13

223

Martin Kleppmann

@martinkl

6 years

The recording of my talk at @QConLondon , “CRDTs and the Quest for Distributed Consistency”, is now up 🎥🎤

CRDTs and the Quest for Distributed Consistency

Martin Kleppmann explores how to ensure data consistency in distributed systems, especially in systems that don't have an authoritative leader. He explains how to sync data between a phone and a...

www.infoq.com

2

78

224

Martin Kleppmann

@martinkl

6 years

What’s current best practice for GDPR compliance (in particular, right to deletion) in systems with append-only logs/event sourcing/bl*ckchains, which are supposed to keep history forever?

30

73

219

Martin Kleppmann

@martinkl

3 years

Fascinating Google paper on CPU cores that occasionally (and nondeterministically) compute the wrong result. Detecting and mitigating this is going to be an interesting challenge.

4

46

223

Martin Kleppmann

@martinkl

7 years

If not, fuck it, you have my permission to steal my book over BitTorrent. I care about sharing knowledge, not royalties.

6

77

221

Martin Kleppmann

@martinkl

5 years

I love this artwork so much (“Paradoxymoron“ by Patrick Hughes, found in the basement of the British Library in London)

3

38

218

Martin Kleppmann

@martinkl

5 years

Happy 50th birthday to the Internet today! On 29 October 1969, the first message was sent over the ARPANET

ARPANET - Wikipedia

en.wikipedia.org

2

93

217

Martin Kleppmann

@martinkl

4 years

New paper! 😎 In which @heidiann360 and I explore Git-like hash graphs, Bloom filters, and peer-to-peer systems that are immune to Sybil attacks. 📄 Paper: 📎 Blog post:

Byzantine Eventual Consistency and the Fundamental Limits of...

Sybil attacks, in which a large number of adversary-controlled nodes join a network, are a concern for many peer-to-peer database systems, necessitating expensive countermeasures such as...

arxiv.org

5

40

213

Martin Kleppmann

@martinkl

3 years

I think about this a lot. Lockdown is middle-class people staying at home, and poor people bringing them things.

Pol Wiseman

@Firecrazee

4 years

Yep. #tier2 #CovidUK

9

111

440

6

33

208

Martin Kleppmann

@martinkl

4 years

ACM Europe calls for an EU-wide carbon tax, with no exemptions for computing, and strongly recommends against “any proof-of-work based distributed ledger technology” due to its “exorbitant power consumption”. Hooray! 🇪🇺🌍

4

73

205

Martin Kleppmann

@martinkl

4 years

Seph Gentle @josephgentle , author of ShareDB, explains how he came to realise that CRDTs are the future. And hardly anybody knows knows collaboration algorithms better than Seph!

I was wrong. CRDTs are the future

I saw Martin Kleppmann’s talk a few weeks ago about his approach to realtime editing with CRDTs, and I felt a deep sense of despair. Maybe all the work I’ve been doing for the past decade won’t be...

josephg.com

4

58

204

Martin Kleppmann

@martinkl

6 years

Basically, I think owning Bitcoin is incompatible with having any sort of environmental conscience

48

49

203

Martin Kleppmann

@martinkl

2 years

I used to think the NATO target of spending 2% of GDP on defence was excessive, and that the US’s 3.7% was far too militaristic. But in the last week, any pacifist tendencies I once had have been shattered. Bring on those defence budgets.

21

20

201

Martin Kleppmann

@martinkl

3 years

Decentralised web technologies will need to figure out when, why, and how to ban abusive users. Without central control, how do systems determine what behaviour is acceptable? Some thoughts in my latest blog post

15

59

202

Martin Kleppmann

@martinkl

4 years

Great detailed exploration by @dave_universetf of how NAT traversal works — a.k.a. the joys of trying to make peer-to-peer software work (attn @pvh )

3

49

198

Martin Kleppmann

@martinkl

3 years

I have been informed that I can now have a second career as lookalike of Daði Freyr, Iceland's entry at Eurovision

8

1

197