Xcalar does not currently report I/O throughput nor IOPS from within Xcalar Design.
One reason for that is that Xcalar does not own the resources involved. Xcalar is typically importing data from external sources/systems.
That being said, Xcalar can cause local I/O through Exports or if Serialization/Deserialization is occurring (in Operational mode).
Xcalar has a forthcoming product called Xcalar Enterprise Manager which will report hundreds of statistics from the Xcalar cluster, as well as accumulate historical data. This product has not been released yet.
In the mean time, Operating System monitoring tools are commonplace for monitoring the cluster at the o/s level.
Please stay tuned as Xcalar Enterprise Manager is released for general availability.