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 >>>>> >>>>> >>>>> >>>> >>> >>> >
