Controls GroupControls Group
Paper LogbookLimitations
• Single User – Read & Write One attempt to better distribute info – paper copies
daily logs posted outside the control room No way to overcome single user write limit
• Single Location – Control Room• Usability
Readability depends on user penmanship Graphs, pictures, images stapled in on paper Difficult to locate references
Controls GroupControls Group
Paper Logbook
How much longer
?
Maybe we can see over his head!!
Tic-Toc
Controls GroupControls Group
Electronic LogbookRemoves Paper Logbook Limitations
• Multi-user read/write simultaneously • Read and write from anywhere with internal web
access• Usability
Typed text, scanned images, tables of data Links to other information Annotated Entries Possible
Controls GroupControls Group
Electronic Logbook
From MCC
From Home
From Your Office
From Service Bldg
Controls GroupControls Group
JLab Implementation
• Read via Web Browser
• Multiple interfaces for entries Dtlite - tcl tool, tied to Downtime Logs and
Trouble Reporting System Web entry Command line entry Auto logging by programs and scripts
Controls GroupControls Group
Elog Security
• Read Allows security to be added using Web Servers Sensitive logs are password protected
• Write Entries are not user modifiable after
commitment
Controls GroupControls Group
JLab Implementation
• Multiple linked logbooks for various group/functions: E-log – Accelerator Operations S-log – Software SAD-log – System Admin & Network PO-log – Polarized Source C-log – Cryogenic systems HA-log, HB-log, HC-log – Halls A, B, C
Controls GroupControls Group
Drawbacks
• Simple design - not fault tolerant
• Numbering unreliable
• File System Based