perfSONAR User Q&A and Other Discussion

[Brian Candler <>]

On 10/04/2017 19:46, Andrew Lake wrote:
> There are a a whole bunch of new features in pScheduler vs 
> BWCTL+regular testing. We actually keep a schedule in a database now, 
> so unlike BWCTL, you can know when things ran, what’s running and when 
> they are going to run. We also keep lots more diagnostics information 
> so it’s easier to debug things when a test is missed, etc. In addition 
> to that, it has a plug-in architecture for writing new tests, tools 
> and archivers.
Thanks - that's very useful to know.
> First of all, both 2GB and running on a VM would be against what we 
> recommend for 3.5 (and probably a version or two earlier than that as 
> well). That being said I have 2 ESnet productions hosts upgraded to 
> 4.0 running 2GB memory that are fine with a local MA, but they also 
> run a handful of tests and I have optimized cassandra not to eat as 
> much memory at the cost of running bit slower (fwiw I did this 
> optimization when 3.5 was released, because it worked poorly otherwise).
Is there a doc which summaries the cassandra tweaks suggested?  I've now 
increased these VMs to 3GB but would still like it to make better use of 
that memory.

Regards,

Brian.