This is merged. Thanks everybody for the reviews and testing. Andor
> On Jun 17, 2026, at 11:20, Andor Molnár <[email protected]> wrote: > > Hi Nick and all, > > branch-3 backport is available for review: > > https://github.com/apache/hbase/pull/8364/ > > Regards, > > Andor > > > > >> On May 23, 2026, at 13:15, Andor Molnár <[email protected]> wrote: >> >> Thank you Nick and thanks for the great help with CI issues. >> >> Sure, we can start to work on a branch-3 backport soon. I agree that the >> feature should be released sooner rather than later. >> >> Regards, >> Andor >> >> >> >>> On May 22, 2026, at 10:42, Nick Dimiduk <[email protected]> wrote: >>> >>> Congratulations Andor and team! >>> >>> Any chance of a backport to branch-3? It's probably not going to work for >>> 3.0, but we should aim to ship this in a "beta release" from on 3.1. From >>> hard-won experience, it's best if a new feature doesn't "rot" on master. >>> The sooner we ship it on a release line, the better for everyone. >>> >>> Thanks, >>> Nick >>> >>> On Fri, May 22, 2026 at 3:02 PM Andor Molnár <[email protected]> wrote: >>> >>>> Hi all, >>>> >>>> The feature has been merged to the master branch. >>>> >>>> Kudos to all contributors: >>>> >>>> - Anuj Sharma <[email protected]> >>>> - Kevin Geiszler <[email protected]> >>>> - Shanmukha Haripriya Kota <[email protected]> >>>> - Abhishek Kothalikar <[email protected]> >>>> >>>> Huge thanks to the reviewers: >>>> >>>> - Charles Connell <[email protected]> >>>> - Tak Lon (Stephen) Wu <[email protected]> >>>> >>>> We will continue the work by preparing patches for the documentation and >>>> integration tests next week. >>>> >>>> Best regards, >>>> >>>> Andor >>>> >>>> >>>> >>>>> On May 19, 2026, at 19:54, Andor Molnár <[email protected]> wrote: >>>>> >>>>> Hi HBase team, >>>>> >>>>> Just a quick heads-up for the community. >>>>> >>>>> The feature merge PR is all approved now. We’re working on fixing the CI >>>> to get a green >>>>> build and once it’s done, the PR is ready to be merged. >>>>> >>>>> Last chance to share your thoughts and review the code changes. >>>>> >>>>> Thanks for the tremendous help for everybody who contributed. >>>>> >>>>> Regards, >>>>> Andor >>>>> >>>>> >>>>> >>>>>> On Apr 8, 2026, at 10:30, Andor Molnár <[email protected]> wrote: >>>>>> >>>>>> Hi all, >>>>>> >>>>>> We would like to propose merging the feature “Read Replica Cluster” >>>> into >>>>>> the main branch. >>>>>> >>>>>> *Background* >>>>>> >>>>>> We’d like to implement the open source version of Amazon’s Read Replica >>>>>> Cluster on S3 feature [1] for Apache HBase. It adds the ability of >>>> running >>>>>> another HBase cluster on the same cloud storage location in read-only >>>> mode, >>>>>> allowing users to share the read workload between multiple clusters. >>>> Due >>>>>> to the characteristics of the implementation and the lack of automated >>>>>> synchronization between the active and read-replica clusters, read >>>> replicas >>>>>> are eventually consistent, hence they’re not suitable for reading most >>>>>> recent data. However we still believe that users of open source Apache >>>> HBase >>>>>> could take advantage of this feature and there are use cases out there >>>> which >>>>>> read replicas could help with. Please find more information about the >>>>>> feature in the linked blog post. >>>>>> >>>>>> *Pros* >>>>>> >>>>>> - Running multiple clusters in different Availability Zones adds HA to >>>> the >>>>>> entire workload, >>>>>> - No need for data movement or duplication (active-active replication >>>> setup) >>>>>> which is cost and time efficient, >>>>>> - No limit for the number of read replica clusters >>>>>> >>>>>> *Cons* >>>>>> >>>>>> - Read Replica clusters are eventually consistent: in memory data is >>>> not >>>>>> visible from read replicas, >>>>>> - Read Replica clusters must be manually refreshed: flush on active >>>> cluster, >>>>>> refresh hfiles/meta on read replicas >>>>>> >>>>>> A detailed description of the design and implementation can be found in >>>> the >>>>>> following document: >>>>>> >>>>>> Apache HBase Read Replica Cluster Feature [2] >>>>>> >>>>>> Please review and share your feedback or comments on the pull request. >>>> [3] >>>>>> >>>>>> Best regards, >>>>>> Andor Molnar >>>>>> >>>>>> >>>>>> [1] >>>> https://aws.amazon.com/blogs/big-data/setting-up-read-replica-clusters-with-hbase-on-amazon-s3/ >>>>>> [2] >>>> https://docs.google.com/document/d/1EI0lsURX1BZhv3DYgMvZCl4EUy-ADJRkHUc1PjzZtj0/edit?usp=sharing >>>>>> [3] https://github.com/apache/hbase/pull/8044 >>>>>> >>>>>> >>>>>> >>>>> >>>> >>>> >> >
