1. 7 February 2008Dietrich Beck A LabVIEW Interface to ELOG ELOG Possible solution paths Status Integration into – CS ? – Domain Management System?

2. 7 February 2008Dietrich Beck What is ELOG? Electronic LOGbook, by Stefan Ritt, http://midas.psi.ch/elog/http://midas.psi.ch/elog/ Simple: one binary, one configuration file -> web server Versatile: display, access rights, one or more logbooks on a single server Use Cases –Personal logbook: remote access, no need to carry around paper –Shared logbook: reply to entries displayed in threads –Shift logbook: entries with author and timestamp, used as "documents", with flags allow delete and allow modify set to "off" –file collections via attachments –small database via arbitrary attributes Security: –username, password –using an HTTPS proxy is recommended (like Apache) and/or ssh

3. 7 February 2008Dietrich Beck

4. 7 February 2008Dietrich Beck

5. 7 February 2008Dietrich Beck Possible Solution Paths using the ELOG "client" program elog –elog "client" local: from LabVIEW using the "System Exec.vi" –elog "client" remote: via a Shared Variable to local "client" implementing the protocol of the elog "client" with LabVIEW ELOG elog "client" LabVIEW

6. 7 February 2008Dietrich Beck Example: Local elog "client"

7. 7 February 2008Dietrich Beck Status it works, but writing only, no reading (viewing), and submitting an entry requires information like –logbook setup (allowed categories, types,...) –logbook information (node, port, name,...) –user information (username, password).

8. 7 February 2008Dietrich Beck Possible Applications Domain Management System –DMS Client: write into logbook change of local configuration when a process is started/re-started/crashed/killed –DMS Server: write into logbook "domain" updates user interaction CS –startup, shutdown –severe and/or fatal error messages –create/destroy objects –...

9. 7 February 2008Dietrich Beck Pros and Cons Pros –documentation of important incidents –what went wrong, why, in which order –post-mortem analysis –bug finding –analysis of operation based on statistics via the logbook –ELOG is existing –... Cons –developer: another feature to be implemented and maintained –user: another feature to be understood and configured –usage of another third party tool –can't read ELOG programmatically? –where and how to configure the settings? –...