Applying Control Theory to Stream Processing Systems. Wei Xu ( email@example.com ) Bill Kramer ( firstname.lastname@example.org ) Joe Hellerstein ( email@example.com ). TCQ drops tuples silently if result queue is full. Description of the system. TCQ Complex internal structure. Data Source.
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Wei Xu (firstname.lastname@example.org)
Bill Kramer (email@example.com)
Joe Hellerstein ( firstname.lastname@example.org )
P Controller with Pre-compensation
Output Thread(Code Reuse)
Data Rate to TCQ
Actual Queue Length
Model evaluation – Making the system operate in desired range
Data rate vs free space
Easy for data source, but queue length ..
A lot of small disturbance in a Java program
Incremental garbage collection
Y(k) , and we know what we want y(k+1) to be.. Use transfer function to solve for u(k)…
(Expected result – accuracy and disturbance ) -- do be done
Model evaluation – A data rate that make it operate in linear range