Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
The Path Towards Simplifying Consistency in Dis...
Search
Caitie McCaffrey
April 24, 2017
Technology
1
320
The Path Towards Simplifying Consistency in Distributed Systems
Caitie McCaffrey
April 24, 2017
Tweet
Share
More Decks by Caitie McCaffrey
See All by Caitie McCaffrey
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
331
21k
Argus Papers We Love
caitiem20
13
1.2k
The Verification of a Distributed System
caitiem20
22
2.2k
We Hear You Like Papers: Eventual Consistency
caitiem20
14
810
The Verification of a Distributed System
caitiem20
12
770
The Verification of a Distributed System
caitiem20
6
770
A Brief History of Distributed Programming: RPC
caitiem20
31
6.6k
Building Scalable Stateful Services
caitiem20
12
1.6k
Papers we Love PDX
caitiem20
2
1.3k
Other Decks in Technology
See All in Technology
社会人力と研究力ー博士号をキャリアの武器にするー
kentaro
2
110
kernelvm-brain-net
raspython3
0
450
Part1 GitHubってなんだろう?その1
tomokusaba
3
720
Ninno LT
kawaguti
PRO
1
110
ソフトウェアテスト 最初の一歩 〜テスト設計技法をワークで体験しながら学ぶ〜 #JaSSTTokyo / SoftwareTestingFirstStep
nihonbuson
PRO
1
120
OPENLOGI Company Profile
hr01
0
63k
コスト最適重視でAurora PostgreSQLのログ分析基盤を作ってみた #jawsug_tokyo
non97
2
900
CodeRabbitと過ごした1ヶ月 ─ AIコードレビュー導入で実感したチーム開発の進化
mitohato14
1
240
newmo の創業を支える Software Architecture と Platform Engineering
110y
0
150
大規模サーバーレスプロジェクトのリアルな零れ話
maimyyym
3
200
MySQL Indexes and Histograms – How they really speed up your queries
lefred
0
150
問 1:以下のコンパイラを証明せよ(予告編) #kernelvm / Kernel VM Study Kansai 11th
ytaka23
3
420
Featured
See All Featured
Product Roadmaps are Hard
iamctodd
PRO
53
11k
VelocityConf: Rendering Performance Case Studies
addyosmani
329
24k
Build your cross-platform service in a week with App Engine
jlugia
230
18k
How to train your dragon (web standard)
notwaldorf
91
6k
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
656
60k
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
23
2.7k
The Invisible Side of Design
smashingmag
299
50k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
RailsConf 2023
tenderlove
30
1.1k
Designing Experiences People Love
moore
142
24k
Agile that works and the tools we love
rasmusluckow
329
21k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
26k
Transcript
The Path Towards Simplifying Consistency in Distributed Systems
Caitie McCaffrey Distributed Systems Engineer caitiem.com @caitie
Distributed Systems Engineer Feral Concurrency Control Programmer Caitie McCaffrey
2015
2015 “Application-level Mechanisms for maintaining database integrity”
Halo 4 Statistics Service Halo 4 Statistics Service Record &
Aggregate Statistics From Every Multiplayer Halo Game a User Plays
Halo 4 Statistics Service
Observability at Twitter Make Dashboards & Alerts Always Available
Cmd Line Tool Viz / Dashboad Alerting Svc Cuckoo-Read Cuckoo-Write
Indexing Svc Relay Svc Twitter Front End Twitter Svc Twitter Statsite Twitter Svc Twitter Svc Scribe Collection Agent HDFS Manhattan Database Public Cloud Observability at Twitter
Notify Users When We Receive Abuse Reports
Notify Users If An Action is Taken
Report Events Stream Modification Events Stream Enrollment Events Stream Listener
Service Daemons Service Executor Service Notification Events Stream Notification Service Manhattan Macaw
Feral Concurrency Control
Service Service Service Monoliths
The Rise of NoSQL
None
Microservices
State of Affairs
Linearizable Sequential Causal Pipelined Random Access Memory Read Your Write
Monotonic Read Monotonic Write Write From Read Consistency Models
None
None
None
None
None
None
Can We Do Better?
Finance & Accounting
VisiCalc 1979
1983 Lotus 123
None
1987 Excel
None
& Standardization Computer Aided Computation
Standardization for Consistency in Distributed Systems
1988
1988 “We believe the form of communication that is needed
is remote procedure call with at- most-once semantics”
1988 “An adequate language must provide a modular, reasonably automatic
method for achieving consistency ”
Branch B Account 789: $250 Branch A Account 123 :
$100 Account 456: $50 SubAction: Deposit (123, 50) Transfer Action SubAction: Withdraw(789, 50) Transfer Deposit Withdraw enter topaction coenter action branchA.Deposit(123, 50) action branchB.Withdraw(789, 50) end end
What about Spanner?
2015
2015 “The biggest barrier…is that consistency mechanisms must integrate across
many stateful services”
Microservices
CRDTs * Stolen from Chris Meiklejohn in practice
CRDTs * Stolen from Chris Meiklejohn in practice
There Is No One Size Fits All Consistency Model
Mixed Consistency Data Stores Manhattan
None
Computer Aided Computation for Consistency in Distributed Systems
2016
Bank Application Bank Account must be > 0 Deposit Money
Withdrawal Money
‘Cause I’m Strong Enough: Reasoning About Consistency Choices in Distributed
Systems
Define Invariants & Actions Deposit Money Withdrawal Money Determine Consistency
Required Bank Account > 0 Eventual Consistency Strong Consistency Code Generation?
& Standardization Computer Aided Computation
Thank you @caitie