https://community.cloudera.com/t5/Support-Questions/Where-are-Tez-logs-stored/m-p/280449#M208852 <P>Okay, I see that the ATS puts the logs in <STRONG><EM>/ats/done</EM></STRONG>&nbsp;directory in HDFS and this is configured by property <EM><STRONG>yarn.timeline-service.entity-group-fs-store.done-dir</STRONG></EM><BR /><BR />1. What is the difference between&nbsp;</P><P class="p1"><STRONG><EM>org.apache.hadoop.yarn.server.timeline.LeveldbTimelineStore</EM></STRONG> and&nbsp;</P><P class="p1"><STRONG><EM>org.apache.hadoop.yarn.server.timeline.EntityGroupFSTimelineStore</EM></STRONG> ? Does the ATS generate logs in path <EM><STRONG>/ats/done</STRONG></EM> only if&nbsp;</P><P class="p1"><EM><STRONG>yarn.timeline-service.entity-group-fs-store.summary-store</STRONG></EM> is set to the <STRONG><EM>EntityGroupFSTimelineStore</EM></STRONG>&nbsp;?&nbsp;</P><P><BR />2. Do all three versions of the Application Timeline Server (1.0, 1.5, 2.0) generate logs in <EM><STRONG>/ats/done</STRONG></EM> or there is a difference in versions?<BR /><BR /></P><P>3. For some executed queries, I see that only single <STRONG><EM>entity</EM></STRONG>, <STRONG><EM>summary</EM></STRONG> logs get generated whereas for other executed queries I see multiple <EM><STRONG>entity</STRONG></EM>, <EM><STRONG>summary</STRONG></EM> logs getting generated. Is there any structure to this? Like when do we expect a single <EM><STRONG>entity</STRONG></EM> or <STRONG><EM>summary</EM></STRONG> logs or multiple?<BR /><BR />TIA</P> Thu, 17 Oct 2019 08:59:15 GMT rohan_kulkarni 2019-10-17T08:59:15Z