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'Server-side on Swift' by Volodymyr Shevchenko
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CocoaHeads Ukraine
December 16, 2017
Programming
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58
'Server-side on Swift' by Volodymyr Shevchenko
This talk was made for CocoaHeads Kyiv #13 which took place Dec 16 2017.
CocoaHeads Ukraine
December 16, 2017
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Transcript
Server-side on Swift by Volodymyr Shevchenko
What for? - We will do mobile better - Can’t
build App on our own - Backend is a black-box with API
Why Swift? ??
Why Swift? - we know Swift - we can reuse
some code - Swift is faster
Kitura Perfect Vapor Zewo What do we have:
⭐ GitHub Req/sec Looks Good? Kitura 6K 2.1K No Perfect
12.3K 4.2K Yes Vapor 11.6K 3.2K Yes Zewo 1.7K 1.7K No Benchmarks of the Top Server-Side Swift frameworks
Vapor Perfect
Let’s build something
Pet Store - Authorization - Domain CRUD - REST API
Check Local Credentials Create new User Check FB Credentials Create
Session Object Success? Facebook Database Cache Yes No ERROR response TOKEN response
Success? Database Cache Yes Proceed with request 401 response Fetch
session from Cache Fetch session from DB Success? No No Yes
User Pet Order Tag Category Domain relations *
Our stack: - Perfect as a framework - Mongo DB
as storage - StORM as ORM
Few words from Cap…
Leaks are evil
None
Crashes are evil
! Force unwrap is evil
Cocoapods Carthage SPM
XCode just an editor
≠
- this won’t compile on Linux: - after fix:
Foundation is NOT ported for 100% https://github.com/apple/swift-corelibs-foundation/blob/master/Docs/Status.md … …
≠ (curl + libssl) (curl + openssl)
[“a”, “b”, ”c”] -> “a, b, c” Bugs in MongoDBStORM
[“a”, “b”, ”c”] -> “a, b, c” - Work without
ORM - Switch to an other DB - Switch to Vapor + Fluent - Fix bug
Nested objects are MongoDBStORM not supported
¯\_(ツ)_/¯
Lets Deploy
Where?
Where? - Amazon EC2 - Microsoft Azure - Google Cloud
- Digital Ocean - Linode - Alibaba cloud - IBM cloud - Packet - Vultr - …
Where? - Amazon EC2 - Microsoft Azure - Google Cloud
- Digital Ocean - Linode - Alibaba cloud - IBM cloud - Packet - Vultr - …
How to deploy?
Perfect Assistant
Perfect Assistant
Docker
Plain
2) Connect to remote machine via SSH 3) Install all
required tools and libs 4) Setup Database server 5) Clone sources from Git repo 6) Compile 7) Configure firewall to allow http(s) traffic 8) Run executable 1) Create remote virtual machine on selected provider Plain Deploy
Performance - apib tool - Latency (MIN, MAX, AVG) -
Requests/second
Performance req/sec Lat, min Lat, max Lat, avg Healthcheck 26.8K
0.6 42 7.4 Empty Auth 739 9 643 269 Auth + Read 407 10.1 952 487 Auth + Write 389 9.4 1028 511
Scale - Vertical - Horizontal
Database is Server Database Server API Server Network
Scaled infrastructure Database Server API Server II API Server I
API Server III Load Balancer
0 500 1000 1500 2000 Empty Auth Auth + read
Auth + write Requests per second
0 150 300 450 600 Empty Auth Auth + read
Auth + write Average latency, ms
Cluster Performance req/sec Lat, min Lat, max Lat, avg Healthcheck
21.1K 1.4 1105 9.4 Empty Auth 1820 4.7 473 109 Auth + Read 897 3.1 243 55.6 Auth + Write 916 13 617 217.5
Questions?
Thanks!