Hi Xiao, The 3.x will continue to release, especially for bug fix and security issues. For new features and enhancements, it depends. The main consideration is the testing and release effort: now each 3.x release needs to build and test with 4 HBase API versions; even so, many users still encounter environment problems in the even newer Hadoop platform like CDH 6.3, CDP 7, etc. So we will slow down the 3.x release frequency, so to move more efforts on the parquet storage. The parquet storage has much better compatibility on different platforms.
Best regards, Shaofeng Shi 史少锋 Apache Kylin PMC Email: shaofeng...@apache.org Apache Kylin FAQ: https://kylin.apache.org/docs/gettingstarted/faq.html Join Kylin user mail group: user-subscr...@kylin.apache.org Join Kylin dev mail group: dev-subscr...@kylin.apache.org chuxiao <crow...@163.com> 于2020年7月25日周六 下午12:12写道： > Will 3.x continue to release？For example，support hbase rsgroup. > > > > > > At 2020-07-24 19:23:11, "ShaoFeng Shi" <shaofeng...@apache.org> wrote: > > Hello, Kylin users, > > Regarding the Kylin Parquet storage, we hope to update the progress here. > At present, we have completed the main development work[1], design > document[2], and the benchmark. With the new architecture, Kylin is going > to be more efficient and be more cloud-friendly: fully on Spark, less > dependency on Hadoop stack, which made the DevOps easier. > > Here we discuss the future plan, which includes the two aspects. > > 1. The plan for Kylin 4.0 > > In Kylin 3.x, we have released some important functions/features, such as > real-time analysis, Flink building engine, global dictionary with Hive, > etc. In the next phase, we hope to concentrate on the Parquet storage > engine and to release it in Kylin v4.0 within this year. In this period, > 3.x will be keeping maintained for bug fix and security vulnerability, but > won't introduce big change or major features. > > 2. Backward compatibility for HBase storage. > > When we develop the Parquet storage engine, we find it is very difficult > to make the Parquet and HBase engines co-exist. The codebase becomes very > complicated and ugly, inevitably bring big challenges to the maintenance > and release. Besides, as HBase has different APIs (v1.1, v2.0, besides, the > CDHs' are different from the community's'), which makes the testing and > release effort be doubled or tripled in the past years. > > So, we plan to remove the HBase storage engine in Kylin 4.0; The Kylin > metadata will also migrate to MySQL. For existing users, if you want to use > the HBase engine, then keep in the Kylin 3.x; If you want to upgrade to the > Parquet storage, a migration tool can be provided later (another discuss > thread). > > Welcome to tell us your concerns and suggestions! Thank you for your > participation. > > ## Reference > [1] https://github.com/apache/kylin/tree/kylin-on-parquet-v2 > [2] > https://cwiki.apache.org/confluence/display/KYLIN/KIP-1%3A+Parquet+storage > > Best regards, > > Shaofeng Shi 史少锋 > Apache Kylin PMC > Email: shaofeng...@apache.org > > Apache Kylin FAQ: https://kylin.apache.org/docs/gettingstarted/faq.html > Join Kylin user mail group: user-subscr...@kylin.apache.org > Join Kylin dev mail group: dev-subscr...@kylin.apache.org > > >
