Java at Alibaba

17 Pages·2017·1.06 MB·English

Java at Alibaba
San Hong Li
Senior Software Engineer at Alibaba
[email protected]
Agenda
• About Alibaba
• How Java is used at Alibaba
• Alibaba and community
Alibaba Family Tree
THE ALIBABA GROUP ALIBABA.COM
Alibaba’ B2B arm
ALIEXPRESS 1688.COM
TAOBAO.COM TMALL.COM ALIYUN.COM ALIPAY.COM CAINIAO.COM
A
N
A N/A N/A
L
O
G
Y
Alibaba’ C2Carm Alibaba’ B2C arm Alibaba’ cloud Alibaba-backed Alibaba-backed
computingplatform paymentcompany logistics company
China's Singles' Day
Gross Merchandise Volume(GMU) on Singles Day
20
18
s
ra 16
llo 14
d
S 12
U
n 10
o
illib 68
n
i U 4
M 2
G
0
-2 2011 2012 2013 2014 2015 2016
Year
• Single's Day, the world's biggest online shopping day, the total sales in 2016 reached
$17.8 billion
• In contrast, the total online sales from Thanksgiving, Black Friday and Cyber Monday
combined in the US in 2016 is: $12.8 billion (source: www.practicalecommerce.com)
Symbolized by four 1s, Nov 11 is the so called “Singles’ Day” in China
China's Singles' Day(Cont.)
Transantions per Second(at peek)
200000
175,000
180000
160000 140,000
140000 120,000
120000
100000 80,000 86,000
80000
60000 42,000 38,000
40000
14,000 15,000
20000 31220000 3,850
0
2011 2012 2013 2014 2015 2016
Alibaba cloud platform Alibaba payment service
• On Singles Day in 2016, peak transactions/sec reached 175k, and
peak payment orders processed/sec reached 120k
• In contrast, Visa can now process a peak volume of 56K messages
per second(source: www.digitaltransactions.net)
Java at Alibaba
• Running Java at massive scale
• Million instances of JVMs, serving insurmountable number of
requests every second
• Service oriented architecture
• Services communicate with each other via RPC
• typically, many JVMs as one cluster per service
• Heterogeneous
• The native libraries written in C/C++ communicate with Java via JNI
Java at Alibaba(Cont.)
C2C, B2C, B2B AliYun Alipay CaiNiao Others
Middleware
AJDK
AliOS (x64, Linux)
All the Java applications developed in Alibaba and affiliated
companies, such like Alipay, CaiNiao are running on AJDK.
: Alibaba/Alipay JDK, based on OpenJDK
Java Technology we used
Apache Tomcat®
……
• Alibaba custom-builds most of its software based on rich Java open-source
ecosystem, which are implemented for online trading, payments, logistics, and a
lot of other things.
AJDK Team
• Development
• Develop new features to meet our business requirements
• Fix bugs
• Port patches from upstream
• Release
• Quarterly
• Sync up with upstream before release
• Current main release: JDK8/x64-linux
• Testing
• Jtreg test suits
• Our own unit test suits
• SVT
• A/B testing
• Developer support
• Troubleshooting
• Consultancy
AJDK: customize OpenJDK for our own needs
• Performance optimization and cost saving
• High density deployments
• Optimize for higher throughput
• Enhancement in JVM
• Profile-driven application optimization
• Reduce latency caused by GC
• Diagnostics tools for troubleshooting support
• Intrinsically designed for cloud