How Pinot loads the segment.i.e. If I am consuming data from Kafka and if any new events come in Kafka so pinot will load the entire segment once again or only the new events.?

For new events are consumed in memory. For segments already flushed to disk, Pinot memory maps them so only part of the segment needed to be read is pulled in.

Okay @User Thank ! !.Do we hv any documents for the same to understand how internally it works and how internally controller store it on server.?

Thanks @User