[Swift-user] Set maxtime > maxwalltime or your script will hang

[Michael Wilde]

On Apr 27, 2010, at 11:48 AM, Mihael Hategan wrote:

> A comment there:
> Set the "maxtime" coaster parameter if you know that the queue you are
> using has a limit to the time a job can have. Don't set it because your
> jobs have a certain maxwalltime. It's purpose is to prevent the creation
> of blocks that cannot be run on a given queue.

Mihael, can you clarify this (and the related text from the User Guide)?

Users almost always want to get their jobs into a "good" queue, and hence
they usually feel compelled to set maxtime.  So more questions arise when
you try to figure out how to do this:

- How does coasters fill blocks?

- What LRM wall time will be used when maxtime is not specified? 
  (i.e, how many jobs will coasters place in a block)?

- Is coasters committing more jobs to specific blocks (and hence specific sites)
  than the block has cores,  when it computes its schedules?
  Or just estimating what it may need?