[Swift-devel] Expected behavior for scheduler slow-start with coasters?

[Michael Wilde]

We are seeing the following on Ranger:

Swift has 2 coaster jobs running in SGE, coastersPerNode is set to 16, 
yet it seems to be doing "slow start" as if it doesnt know that it ca 
quickly fill the available coaster slots.

For example, Glen sees the trace below, and is surprised that its not 
running at least 32 app() procs by this point, instead of 2.

Is this expected behavior, or would you have expected the scheduler to 
fill all available coaster slots?

--


Every 2.0s: showq | grep hockyg 
     Mon Apr  6 16:51:38 2009

641061    data       hockyg        Running 16     01:31:50  Mon Apr  6 
16:42:30
641062    data       hockyg        Running 16     01:31:50  Mon Apr  6 
16:42:30
that's ranger
Progress:  Selecting site:98 Stage in:1 Submitting:1 Finished successfully:4
Progress:  Selecting site:98 Submitting:2 Finished successfully:4
Progress:  Selecting site:98 Submitting:1 Submitted:1 Finished 
successfully:4
Progress:  Selecting site:98 Submitted:2 Finished successfully:4
Progress:  Selecting site:98 Submitted:1 Active:1 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:2 Finished successfully:4
Progress:  Selecting site:98 Active:1 Stage out:1 Finished successfully:4
Progress:  Selecting site:98 Active:1 Finished successfully:5
Progress:  Selecting site:97 Stage in:1 Active:1 Finished successfully:5
Progress:  Selecting site:96 Active:3 Finished successfully:5
Progress:  Selecting site:96 Active:3 Finished successfully:5
Progress:  Selecting site:96 Active:2 Stage out:1 Finished successfully:5
Progress:  Selecting site:96 Active:2 Finished successfully:6
Progress:  Selecting site:95 Stage in:1 Active:2 Finished successfully:6