+1 Thank you Marton for the detailed description.
Wanqiang Ji <j...@apache.org> 於 2020年5月14日 週四 上午11:27 寫道： > +1 > > On Wed, May 13, 2020 at 3:53 PM Elek, Marton <e...@apache.org> wrote: > > > > > > > I would like to start a discussion to make a separate Apache project for > > Ozone > > > > > > > > ### HISTORY [1] > > > > * Apache Hadoop Ozone development started on a feature branch of > > Hadoop repository (HDFS-7240) > > > > * In the October of 2017 a discussion has been started to merge it to > > the Hadoop main branch > > > > * After a long discussion it's merged to Hadoop trunk at the March of > > 2018 > > > > * During the discussion of the merge, it was suggested multiple times > > to create a separated project for the Ozone. But at that time: > > 1). Ozone was tightly integrated with Hadoop/HDFS > > 2). There was an active plan to use Block layer of Ozone (HDDS or > > HDSL at that time) as the block level of HDFS > > 3). The community of Ozone was a subset of the HDFS community > > > > * The first beta release of Ozone was just released. Seems to be a > > good time before the first GA to make a decision about the future. > > > > > > > > ### WHAT HAS BEEN CHANGED > > > > During the last years Ozone became more and more independent both at > > the community and code side. The separation has been suggested again and > > again (for example by Owen [2] and Vinod [3]) > > > > > > > > From COMMUNITY point of view: > > > > > > * Fortunately more and more new contributors are helping Ozone. > > Originally the Ozone community was a subset of HDFS project. But now a > > bigger and bigger part of the community is related to Ozone only. > > > > * It seems to be easier to _build_ the community as a separated > project. > > > > * A new, younger project might have different practices > > (communication, commiter criteria, development style) compared to old, > > mature project > > > > * It's easier to communicate (and improve) these standards in a > > separated projects with clean boundaries > > > > * Separated project/brand can help to increase the adoption rate and > > attract more individual contributor (AFAIK it has been seen in Submarine > > after a similar move) > > > > * Contribution process can be communicated more easily, we can make > > first time contribution more easy > > > > > > > > From CODE point of view Ozone became more and more independent: > > > > > > * Ozone has different release cycle > > > > * Code is already separated from Hadoop code base > > (apache/hadoop-ozone.git) > > > > * It has separated CI (github actions) > > > > * Ozone uses different (more strict) coding style (zero toleration of > > unit test / checkstyle errors) > > > > * The code itself became more and more independent from Hadoop on > > Maven level. Originally it was compiled together with the in-tree latest > > Hadoop snapshot. Now it depends on released Hadoop artifacts (RPC, > > Configuration...) > > > > * It starts to use multiple version of Hadoop (on client side) > > > > * Volume of resolved issues are already very high on Ozone side (Ozone > > had slightly more resolved issues than HDFS/YARN/MAPREDUCE/COMMON all > > together in the last 2-3 months) > > > > > > Summary: Before the first Ozone GA release, It seems to be a good time > > to discuss the long-term future of Ozone. Managing it as a separated TLP > > project seems to have more benefits. > > > > > > Please let me know what your opinion is... > > > > Thanks a lot, > > Marton > > > > > > > > > > > > [1]: For more details, see: > > https://github.com/apache/hadoop-ozone/blob/master/HISTORY.md > > > > [2]: > > > > > https://lists.apache.org/thread.html/0d0253f6e5fa4f609bd9b917df8e1e4d8848e2b7fdb3099b730095e6%40%3Cprivate.hadoop.apache.org%3E > > > > [3]: > > > > > https://lists.apache.org/thread.html/8be74421ea495a62e159f2b15d74627c63ea1f67a2464fa02c85d4aa%40%3Chdfs-dev.hadoop.apache.org%3E > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: yarn-dev-unsubscr...@hadoop.apache.org > > For additional commands, e-mail: yarn-dev-h...@hadoop.apache.org > > > > >
