hi there, I am trying to understand what the below text says from NIFI
documentation,

1. What does back pressure mean really in NIFI?, here is my simple flow, 
Some NIFI-source -> Some NIFI processor.
If the amount of input data from the  source is more than the amount of data
the processor can process , then back pressure is applied ? and the 2
parameters(“Back pressure object threshold.”, “Back pressure data size
threshold.”) help in that case ?  

2.If back pressure is applied and I assume flow files are queued up, and
sent in the order they were received.Please confirm

2.back pressure is applied by default ?


"NiFi provides two configuration elements for Back Pressure. These
thresholds indicate how much data should be allowed to exist in the queue
before the component that is the source of the Connection is no longer
scheduled to run. This allows the system to avoid being overrun with data.
The first option provided is the “Back pressure object threshold.” This is
the number of FlowFiles that can be in the queue before back pressure is
applied. The second configuration option is the “Back pressure data size
threshold.” This specifies the maximum amount of data (in size) that should
be queued up before applying back pressure. This value is configured by
entering a number followed by a data size (B for bytes, KB for kilobytes, MB
for megabytes, GB for gigabytes, or TB for terabytes)."



Thanks
Pradeep



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