1JPicus I/O Analysis Framework

How about I/O ?

Kaloyan RaevSAP Labs BulgariaTechnology Development

2JPicus I/O Analysis Framework

Agenda

Why I/O analysis is important? JPicus - closing the gap Why Eclipse? Summary Q&A

3JPicus I/O Analysis Framework

Why I/O analysis is important?

Moving data in and out of RAM Throughput and latency I/O is really slow Today’s IT trends and I/O

Cloud computing / SaaS

Distributed services

Multi-core & Parallelism

Hard drive

4JPicus I/O Analysis Framework

JPicus I/O Analysis Framework

Non-intrusive I/O analysis inside the JVM Cross platform Free of charge

JVM

Application

JPicus Agent-javaagent:jpicus.jar

JPicus UI Test/KPI

Snapshots

5JPicus I/O Analysis Framework

I/O Problem areas

Correctness File handle leaks

Exhausted file handles

Failed delete operations – can’t delete a file

Undesired delete operations – who deleted a file

Performance Excessive I/O / bottlenecks

Suboptimal I/O / insufficient buffering

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Tips and tricks

Always close your streams DocumentBuilder.parse(“jar:file:…”) Equinox: osgi.bundlefile.limit=200 Watch for excessive logging Watch for “Introvert” module contracts No nested archives

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Why Eclipse?

A mature platform Great developer community Widely adopted by the industry Many useful features

Modularity

Perspectives

Automated installation/update

Source code navigation

The best place to consider making JPicus open source

8JPicus I/O Analysis Framework

Possible next steps

TCP & UDP Comparison of snapshots Search functionality / Reports Source code navigation SAP JVM – enable JPicus on demand You name it!

9JPicus I/O Analysis Framework

Summary

I/O Analysis is important JPicus fills the gap Give it a try!

JPicus wiki page

http://jpicus.com

Share your experience! Java Development SDN forum

10JPicus I/O Analysis Framework

Thank you

Q&A

AcknowledgementsKiril MitovPavel Genevski