Archiver work at Jefferson Lab

1
Archiver work at Jefferson Lab

• Chris Larrieu

As told by Matt Bickley
2
Triggered Archiving
Pre-trigger buffer
Post-trigger buffer
Channel 1
Value
Channel 2
Trigger event
Time
3
CZARChannel access Zippy ARchiver
4
Archiver Clients
Xarr
LibIO
CZIO
5
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 Masters degree

6
Network History Server
Glorious Java Interface