Hi @senthilkumar kalimuthu For 1 look at UpdateCounter processor https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-standard-nar/1.4.0/org.apache.nifi.processors.standard.UpdateCounter/index.html For 2 look to wait notify processors. They are similar to P and V functions if you are used to Semaphores https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-standard-nar/1.4.0/org.apache.nifi.processors.standard.Wait/index.html https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-standard-nar/1.4.0/org.apache.nifi.processors.standard.Notify/index.html ... View more