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GroupGroup

Archiver work at Jefferson Lab

Chris Larrieu

As told by Matt Bickley

ContrControlsols

GroupGroup

Triggered Archiving

Time

Value

Trigger event

Pre-trigger buffer Post-trigger buffer

Channel 1

Channel 2

ContrControlsols

GroupGroup

CZARChannel access Zippy ARchiver

Data Acquisition Engine

IOCIOCIOCIOC

Horrible

SQL

Interface

Glorious

Java

Interface

Another

Glorious Java

Interface

ContrControlsols

GroupGroup

Archiver Clients

Xarr

LibIO CZIO

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Data Compression

CZAR uses Zlib compression Custom compression coming soon

Zlib compressions yields 50% compression Analysis shows at least 90% compression with

entropy encoding Required for Chris to get his Master’s degree

ContrControlsols

GroupGroup

Network History Server

Data Acquisition Engine

IOCIOCIOCIOC

Glorious

Java

Interface

History Network Server

Xarr

Network API

Archive Client

LibIO

Network API