Slide 15 of 24
Notes:
Exemplar used as a convenient testbed for tests of Objectivity with many clients
Tested clients running simulated Track reconstruction: CPU-intensive with modest I/O.
Event level (coarse-grained) parallelism
N = 15 - 210 reconstruction processes evenly distributed across the Exemplar system.
Data in an Objectivity/DB database federation hosted on the Exemplar.
Objects read with simple read-ahead optimisation layer (gains a factor 2)
Results: Exemplar very well suited to this workload. With four node filesystems it was possible to utilise 240 processors in parallel with very high efficiency.
