Hi Shashi, This list is more about Apache NiFi and is not really specific to any vendor distributions.
That being said, whatever node NiFi is running on, it will be using local disk to store the internal repositories (flow file, content, provenance). When communicating with HDFS through the PutHDFS processor, NiFi is reading data from it's content repository and sending it to the data nodes of the HDFS cluster, the same as if you installed the HDFS command line client and wrote a file to HDFS. -Bryan On Thu, Jun 15, 2017 at 9:51 AM, Shashi Vishwakarma <[email protected]> wrote: > Hi Koji > > I am trying to evaluate HDF NIfi from security perspective. I am trying to > make sure when HDF Nifi talks to HDP , it does not leak/spill any kind of > information on HDP data nodes (i.e. on local disk). I am fine if it is > writing it on HDFS. > > > > > On Thu, Jun 15, 2017 at 2:35 AM, Koji Kawamura <[email protected]> > wrote: >> >> Hi Shashi, >> >> Sorry for delayed response. I am not aware that NiFi writes any >> provenance information on HDP nodes. But if your goal is to expose >> NiFi provenance data to HDFS, Hive (or Spark) to analyze provenance >> data using those services, then SiteToSiteProvenanceReportingTask >> might be helpful. >> >> SiteToSiteProvenanceReportingTask can sends provenance events in JSON >> format. You can send it to a NiFi input port then pass those into HDFS >> by PutHDFS processor. >> >> If not, would you elaborate what you are trying to accomplish? >> >> Thanks, >> Koji >> >> On Mon, Jun 12, 2017 at 6:25 AM, Shashi Vishwakarma >> <[email protected]> wrote: >> > Hi >> > >> > I have HDF cluster with 3 Nifi instance which lunches jobs(Hive/Spark) >> > on >> > HDP cluster. Usually nifi writes all information to different >> > repositories >> > available on local machine. >> > >> > My question is - Does nifi writes any data,provenance information or >> > does >> > spilling on HDP nodes (ex. data nodes in HDP cluster) while accessing >> > HDFS,Hive or Spark services ? >> > >> > Thanks >> > >> > Shashi > >
