Hi @Avijeet Dash What @Jobin George suggested would help to share common static configuratiosn at various part of a NiFi flow. In addition to that, if you'd like to know how to Put/Get from distributed cache, and how to enrich FlowFiles with cached values, this example might be helpful: Template file is available here: https://gist.github.com/ijokarumawak/8ba9a2a1b224603f877e960a942a6f2b Thanks, Koji ... View more

In my opinion it is best to still regard Hive as an analytical DB. With the ACID (updates) and streaming features the community is stretching the tool to things it wasn't designed for. These are not to be used at very large scale and very large loads. ACID and streaming will put tremendous strain on the Hive metastore. In the end the native storage model of Hive is still based on streaming through whole HDFS files, even with ORC. Without true indexes Hive will never be a real good match for high transactional workloads. Doing large analytical sweeps/scans through data is still at odds with high speed random read/write/update/delete. But that is not bad, there are just other components in HDP to do the other jobs right. ... View more

"I read that accumulo supports cell level security, and hbase doesn't. Is this true?" Both systems support cell-level security; however, I would say that Accumulo's is a more "battle-hardened" implementation. I'm not aware of any case studies behind comparing the two implementations. "and secondly accumulo supports multiple data sources ingestion better and hbase one source such as one web site. is it true? in what ways?" No, I don't know in what way this would be possible. Both systems can ingest data from a variety of sources. This sounds like something was taken out of context. "can someone share any accumulo case studies?" http://accumulo.apache.org/papers/ has some content, http://www.pdl.cmu.edu/SDI/2013/slides/big_graph_nsa_rd_2013_56002v1.pdf, https://arxiv.org/abs/1406.4923, and http://accumulo.apache.org/papers/accumulo-benchmarking-2.1.pdf are each interesting. This talk from PHEMI by Russ Weeks is also particularly nice http://accumulosummit.com/program/talks/preventing-bugs-how-phemi-put-accumulo-to-work-in-the-field/ "Can accumulo be used with full support and rest of hadoop ecosystem?" In short, "yes", but this is subjective due to what you consider the "rest of hadoop ecosystem" and what degree of integration you're expecting. The same goes for HBase. As for HDP, yes, both HBase and Accumulo are fully supported as Tim pointed out already. I would suggest you ask more pointed questions if you have specific concerns. ... View more