Hi Michel, great to see your interest in Ozone and your testing results. Please go through this blog post: https://blog.cloudera.com/multi-raft-boost-up-write-performance-for-apache-hadoop-ozone/
This will describe how write path is working in Ozone, and will give you the tuning tips you need in order to change this behavior which is kind of by design for such small clusters unfortunately. If you have further questions please feel free to ask anytime ;) Pifta Michel Sumbul <michelsum...@gmail.com> ezt írta (időpont: 2020. júl. 24., Pén 17:07): > Hi guys, > > I installed ozone 0.5 (with CDP but i don't think it changed anything) and > I enabled kerberos. The setup has 4 datanodes with a single rack. > When I ingest data in a specific bucket using the HadoopFS with Nifi, I can > see that all the containers get always created on the 3 same datanodes. > Is there any reason why the last datanode don't get any container? Is it an > expected behavior and how can I troubleshoot that? I didn't see anything in > the log that can give me a hint. > > I tried to stop one of the datanode having containers to see if the > containers will get created on the datanode number4 but nothing happened. I > restarted the OM/SCM and the 3 datanodes still up and then it started to > replicate the containers because there was a missing replica. > > After bringing back the datanode that I shutdown at the beginning, I > restart the ingestion of data and again the new container gets created only > 3 specific datanode. > > If you have any tips or explanations that will be helpful. > > Thanks, > Michel >
