In our dev enviornment, we have multiple job databases for testing.

when 24x7 is run as a service.. what job database will it pull up by default? how can I set this behavior ?

It always uses the last opened, regardless of how it runs, as a service or as a standalone system. If you want to automate changing the file without starting the GUI you can use Windows Registry Editor to modify value of the HKEY_LOCAL_MACHINE\SOFTWARE\SoftTree Technologies, Inc.\24x7 Scheduler\3.0\ScheduleFile. After changing this value don't forget to restart the service.

In case if you want to automate that process you can create special 24x7 job which you can run from command line or using shortkut like "24x7.EXE /JOB [job id or name here]" or you can use a batch file.
To use a batch file first create a .REG file (for example MyReg.REG) then create a batch like

regedit MyReg.REG
NET STOP "24x7 Scheduler"
NET START "24x7 Scheduler"

The contents of the REG file can be like 4 example lines below

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\SoftTree Technologies, Inc.\24x7 Scheduler\3.0]
"ScheduleFile"="H:\\Schedule\\Client Support\\MyFile.dat"

: In our dev enviornment, we have multiple job databases for testing.

: when 24x7 is run as a service.. what job database will it pull up by default?
: how can I set this behavior ?

hmm.. changed the reg key, and restated the box & the service... but the database still seemed to come up as the 'example' database.

: It always uses the last opened, regardless of how it runs, as a service or as
: a standalone system. If you want to automate changing the file without
: starting the GUI you can use Windows Registry Editor to modify value of
: the HKEY_LOCAL_MACHINE\SOFTWARE\SoftTree Technologies, Inc.\24x7
: Scheduler\3.0\ScheduleFile. After changing this value don't forget to
: restart the service.

: In case if you want to automate that process you can create special 24x7 job
: which you can run from command line or using shortkut like "24x7.EXE
: /JOB [job id or name here]" or you can use a batch file.
: To use a batch file first create a .REG file (for example MyReg.REG) then
: create a batch like

: regedit MyReg.REG
: NET STOP "24x7 Scheduler"
: NET START "24x7 Scheduler"

: The contents of the REG file can be like 4 example lines below

: Windows Registry Editor Version 5.00

: [HKEY_LOCAL_MACHINE\SOFTWARE\SoftTree Technologies, Inc.\24x7 Scheduler\3.0]
: "ScheduleFile"="H:\\Schedule\\Client Support\\MyFile.dat"

Please make sure the file name is correct and includes the path part. "Example Job.dat" is opened if the specified file cannot be found.

: hmm.. changed the reg key, and restated the box & the service... but the
: database still seemed to come up as the 'example' database.