archive playback - post mortem data analysis -...

Jörg Penning, DESY

PCaPAC 2014

XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser

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Archive Playback -

Post Mortem Data Analysis

PCaPAC 2014

Christian Mein (Comp. sc., Univ. of Hamburg)

Matthias Clausen, Jörg Penning (DESY / MKS-2)

Jörg Penning, DESY

PCaPAC 2014


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Archive Playback - Overview

• The Platform What is CSS?

• Use case What’s that good for?

• Tools Integration in CSS

• Software Architecture UML overview

• Data What is needed?

• Conclusion Current state

• Credits

Jörg Penning, DESY

PCaPAC 2014


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Platform

Control System Studio

• Open-Source platform

• Written in Java

• Based on Eclipse

• Developed by a community

Useful for

• Developing process controls

• Operating

• Maintaining the infrastructure

Jörg Penning, DESY

PCaPAC 2014


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Use case – Currently missing

Some incident is inspected

• We only see what we

are asking for

• We see the timeline of

events

• But not the structure of

the surroundings

Jörg Penning, DESY

PCaPAC 2014


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Use case – Display centric

• The display

shows the

surroundings

• But it is limited to

the current state

• Not suitable post-

mortem

How do we

put this

together?

Jörg Penning, DESY

PCaPAC 2014


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Use case – Display centric

Start the display in

so-called

History-Mode

Jörg Penning, DESY

PCaPAC 2014


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Use case – Focusing

History Mode propagates Click opens

another display

Jörg Penning, DESY

PCaPAC 2014


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Use case – Focusing

Trends and Displays

should be related Structure Timing

Jörg Penning, DESY

PCaPAC 2014


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Tools – History Control View

A simple tool allows for navigation

How to

handle fast

motion?

Jörg Penning, DESY

PCaPAC 2014


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Tools – Trendplotter

History Mode is available for trends too

Switches mode

• Cursor marks

the currently

selected time

• Time range is

selectable here

Jörg Penning, DESY

PCaPAC 2014


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Tools – Interplay

All parts work together …

Sync point in

time

Jörg Penning, DESY

PCaPAC 2014


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Architecture – Display in history mode

Display works without changes

SDSContext

ISimpleDALBroker

HistoryDALBroker

LiveDALBroker

Display

1. Selects

implementation

2. Wraps

display

Jörg Penning, DESY

PCaPAC 2014


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Architecture – Data provision

SDSContext

HistoryDataService

ISimpleDALBroker

HistoryDALBroker Cache

in RAM

Display

Archive-

DB

Channel

*

1. Registers

channels

3. Sends

updates

2. Retrieves

data

Jörg Penning, DESY

PCaPAC 2014


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Architecture – Time control

HistoryDataService

HistoryControlView

Cache

in RAM

Display

Archive-

DB

Channel

*

1. Sets

time range

2. Retrieves

data

This also

works for the

trendplotter

3. Selects

point in time

4. Updates

the channel

Jörg Penning, DESY

PCaPAC 2014


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Data – What is needed

Samples

• Timestamp

• Value

• Alarm state / Severity

Metadata

• Display range

• Units

• Connection state

Not useful

without

metadata

Jörg Penning, DESY

PCaPAC 2014


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Data – Taken from the archive

Enhancements to the archive

• Alarm state / severity

• Metadata

Why not use the control system for metadata?

• Still available if IOC is down

• Still availabe after rework of facility

Jörg Penning, DESY

PCaPAC 2014


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Conclusion – Current state

• Fits nicely into CSS

Seamless integration into GUI / Use model

Makes use of extendable programming model

• Positive feedback on prototype

• Caching in RAM limits time range

• Possibly long initial load time

• Tools do not sync time range in both directions

• Fast motion may omit crucial data

• Only available for SDS / Trendplotter

Jörg Penning, DESY

PCaPAC 2014


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Credits – Where does it come from?

Master thesis by

Christian Mein

Student of comp. science

at University of Hamburg

Communication via

[email protected]

Jörg Penning, DESY

PCaPAC 2014


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Conclusion

Thanks

for your

attention!

archive playback - post mortem data analysis -...

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