Hi Eric, It's Rolling Upgrade without downtime. We have a cluster with thousands of nodes and 5 namespace, it takes 1 month to do the upgrade. Upgrading Service includes JournalNode, NameNode, ZKFC and DataNode. Related issues of rolling upgrade are HDFS-13596，HDFS-14396，HDFS-14831，HDFS-14509. Watching HDFS-13671 about performance.
Thanks! Eric Badger <ebad...@verizonmedia.com.invalid> 于2019年12月9日周一 上午11:54写道： > Hi Runlin, > > Awesome to hear that you've been able to upgrade! Do you mind sharing some > thoughts on your experience with the upgrade? Did you take a cluster > downtime to do the upgrade? How long did the upgrade take? Did you find any > incompatibilities or issues during or after the upgrade? Do you know if > your performance is better, worse, or similar? > > Feel free to answer as many or as few of these as you would like. > > Thanks! > > Eric > > On Sun, Dec 8, 2019 at 9:14 PM Runlin zhang <runlin...@gmail.com> wrote: > > > Hi Folks, > > > > This is Runlin Zhang from DiDi. I'm glad to announce that our HDFS > has > > just been successfully upgraded from 2.7.2 to 3.2.0， Our cluster has > nearly > > 10,000 nodes，Now the cluster services are stable and we are using new > > features, such as EC, that bring huge benefits！ Here I want to thank my > > colleagues for their efforts, Fei Hui, Hu Haiyang, Wang Hongbing, Zhu > > Linhai, Wu Tong; And thanks to the community. > > > > It is also highly recommended that you upgrade the version to 3.2.1, > If > > you have any problems in the upgrade, you can also communicate and > discuss > > with me. > > > > > > Thanks > > Runlin Zhang > > >
