How SoundCloud scales
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- Percival Collins
- 10 years ago
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Transcription
1 How SoundCloud scales Alexander
2 Youtube for Audio
3 Fakten
4 Fakten Alexa Ranking (233)
5 Fakten Alexa Ranking (233) Employees (190) - 80 engineers
6 Fakten Alexa Ranking (233) Employees (190) - 80 engineers 4 office locations (Berlin, London, San Francisco, Sofia)
7 Fakten Alexa Ranking (233) Employees (190) - 80 engineers 4 office locations (Berlin, London, San Francisco, Sofia) >35 million registered users
8 Fakten Alexa Ranking (233) Employees (190) - 80 engineers 4 office locations (Berlin, London, San Francisco, Sofia) >35 million registered users partners (BBC, CNN)
9 Fakten Alexa Ranking (233) Employees (190) - 80 engineers 4 office locations (Berlin, London, San Francisco, Sofia) >35 million registered users partners (BBC, CNN) > Apps
10
11 How SoundCloud scales
12 ?
13 Organization Technology
14 What is the foundation?
15
16 Principles
17 Principles Top-Down vs. Bottom-Up
18 Principles Top-Down vs. Bottom-Up Trust
19 Principles Top-Down vs. Bottom-Up Trust How to react to mistakes
20 Principles Top-Down vs. Bottom-Up Trust How to react to mistakes Continuous Improvement
21 Principles Top-Down vs. Bottom-Up Trust How to react to mistakes Continuous Improvement Innovation
22 Top-Down vs. Bottom-Up Flat Hierarchies? Everybody has them... Engineering teams responsible for architecture (not architecture teams) Influence on the product
23 Trust Deployment Change Management Process Time for technical debt
24 Reaction to mistakes What will be changed if a mistake happens?
25 Innovation R&D Department? Only Product?
26 SoundCloud s basic principles
27 SoundCloud s basic principles No dedicated QA roles
28 SoundCloud s basic principles No dedicated QA roles You build it - you run it
29 SoundCloud s basic principles No dedicated QA roles You build it - you run it Team Building (Rotation, constant changes)
30 SoundCloud s basic principles No dedicated QA roles You build it - you run it Team Building (Rotation, constant changes) Hacker Time
31 SoundCloud s basic principles No dedicated QA roles You build it - you run it Team Building (Rotation, constant changes) Hacker Time Continuous Improvement
32 SoundCloud s basic principles No dedicated QA roles You build it - you run it Team Building (Rotation, constant changes) Hacker Time Continuous Improvement Move fast and break things
33 No QA Does that mean we don t test?
34 You build it - you run it
35 Flat Hierarchy
36 Innovation Hacker Time
37
38 Continuous Improvement Retrospectives Post Mortems (Projekte)
39 Mistakes...
40 Scrum? Kanban? Process?
41 What is the most important thing you have to do so that this works?
42
43 ???
44 ??? Initial Culture
45 ??? Initial Culture Hiring!!!
46
47 SoundCloud Hiring Process
48 How does it look like in reality?
49 Organisation
50 HTML5 Mobile (native) other V1 API Search T&S Payment Partner Tools Data Activ. Delivery Platform System Engineering (Berlin / SF)
51 How do we structure teams? cross functional?
52 Do teams stay the same? Change!
53 Technology
54 Ruby/Scala/Go/Clojure/ Javascript
55 Scale Horizontally/ Vertically?
56 Rails->Mysql RabbitMQ->Cassandra evolution-of-soundclouds-architecture/
57 MySQL 7 Master, 9 slaves, 900GB data Additional slaves in EC2 Master Peak is 15K IOPS writes, 45k reads one slave lags intentionally 1 hour behind Je nach Konsistenzanforderung wird Slave oder Master gewählt (für reads - unterstützt read-only mode)
58 Cassandra 3 Cluster 88 Nodes 15 TB of data up to 70K reads/sec
59 Hadoop Elastic Search Proprietary Spam Detection
60 ElasticSearch 80 Mio Docs (gaining 1 Mio every 6 days) 175 QPS (gaining 15 QPS every month)
61 Hosted in S3/EC2 and physical DCs
62 Outages
63
64 Post Mortems
65 Summary Move fast and break things Don t get slow because you fear to make mistakes
66 backstage.soundcloud.com
67 Alexander Grosse We are hiring!
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