Thanks Chung-En for driving the release! -Siyao
On Mon, Jan 5, 2026 at 10:43 AM Tsz Wo Sze <[email protected]> wrote: > Chunk-En, thanks a lot for rolling out the release! > > (BTW, we probably should send this email to user@ instead of dev@.) > > Tsz-Wo > > > On Mon, Jan 5, 2026 at 9:26 AM Uma Maheswara Rao Gangumalla < > [email protected]> wrote: > > > Thank you, Chunk-En, for driving this. > > > > Regards, > > Uma > > > > On Mon, Jan 5, 2026 at 8:17 AM Chung En Lee <[email protected]> wrote: > > > > > Hello all, > > > > > > We are excited to announce the release of Apache Ozone 2.1.0! > > > > > > Apache Ozone 2.1.0 adds 805 new features, improvements and bug fixes on > > top > > > of Ozone 2.0. > > > > > > Notable Changes: > > > > > > HDDS-10239 | Storage Container Reconciliation > > > Introduced a container reconciliation protocol to resolve mismatched > > > container states and verify replica integrity. > > > HDDS-12940 | Ozone Snapshot Phase 3: Scale up Snapshot Operations > > > Enhanced Ozone Snapshot scalability and continued stability > improvements. > > > HDDS-8387 | Container and volume scanners phase II > > > Enhanced storage volume failure handling by introducing a 'degraded' > > state > > > to preserve data availability, along with improved health > observability. > > > HDDS-12564 | Handling disk issues in Datanodes - Phase II > > > Enhanced Datanode disk space management to prevent out-of-space > failures. > > > > > > New Configuration Options: > > > > > > OZONE_SERVER_OPTS: A new environment variable was added to allow > setting > > > common Java options for all Ozone server processes at once. > > > ozone.compaction.service.enabled: Enable or disable a background job > that > > > periodically compacts rocksdb tables flagged for compaction. The > default > > is > > > false. > > > ozone.om.compaction.service.run.interval: A background job that > > > periodically compacts rocksdb tables flagged for compaction. The > default > > is > > > 6 hours. > > > ozone.om.compaction.service.timeout: A timeout value of compaction > > service. > > > If this is set greater than 0, the service will stop waiting for > > compaction > > > completion after this time. Unit could be defined with postfix > > > (ns,ms,s,m,h,d). The default is 10 min. > > > ozone.om.compaction.service.columnfamilies: A comma separated, no > spaces > > > list of all the column families that are compacted by the compaction > > > service. If this is empty, no column families are compacted. The > default > > is > > > > > > > > > "keyTable,fileTable,directoryTable,deletedTable,deletedDirectoryTable,multipartInfoTable". > > > ozone.om.snapshot.prune.compaction.backup.batch.size: This property > > > controls Prune SST files in Compaction backup directory in batches > every > > > ozone.om.snapshot.compaction.dag.prune.daemon.run.interval. The default > > is > > > 2000. > > > > > > These properties provide more control over the Ratis write buffer, > which > > > can be adjusted to optimize performance based on workload and > > > hardware. > > > > > > ozone.om.ratis.server.pending.write.byte-limit: Sets the maximum byte > > size > > > of all pending write requests. The default is 64MB. > > > ozone.om.ratis.server.pending.write.element-limit: Sets the maximum > > number > > > of pending write requests. The default is 4096. > > > > > > Incompatible change: > > > HDDS-12152 | Ozone now requires the Hadoop 3.4 runtime. Support for > > Hadoop > > > 3.1.2 is deprecated. > > > > > > Default Value Changes: > > > hdds.scm.block.deletion.per-interval.max: Default is now 500,000 blocks > > per > > > interval. > > > hdds.datanode.volume.choosing.policy: Default changed from > > > RoundRobinVolumeChoosingPolicy to CapacityVolumeChoosingPolicy. > > > hdds.datanode.volume.min.free.space: Default changed from 5GB to 20GB. > > > hdds.datanode.volume.min.free.space.percent: Default changed to 0.1%. > > > hdds.datanode.block.deleting.limit.per.interval: Default is now 20,000 > > > blocks per interval. > > > hdds.scm.safemode.min.datanode: Default changed from 1 to 3. > > > hdds.secret.key.expiry.duration: Default is now 9 days. This change > > ensures > > > that tokens remain valid for their full configured duration, preventing > > > premature key invalidation and improving stable authentication. > > > fs.trash.classname: Class name updated to > > > org.apache.hadoop.fs.ozone.OzoneTrashPolicy. > > > ozone.key.deleting.limit.per.task: Default is now 50,000 keys per task. > > > ozone.s3g.https-address: Default changed from None to 0.0.0.0:9879. > > > ozone.om.fs.snapshot.max.limit: Default is now 10,000 snapshots. > > > ozone.om.ratis.segment.size: Default is now 64MB (was 4MB). > > > ozone.scm.ha.dbtransactionbuffer.flush.interval: Default is now 1 min. > > > ozone.scm.ha.ratis.segment.size: Default is now 64MB (was 4MB). > > > > > > Removed Configurations: > > > hdds.rest.http-address: This configuration is removed since HDDS-12761. > > > hdds.scm.safemode.pipeline-availability.check: This configuration is > > > removed since HDDS-11799. > > > > > > Getting Started: > > > Download Apache Ozone 2.1.0 https://ozone.apache.org/downloads/ > > > Documentation https://ozone.apache.org/docs/2.1.0/ > > > > > > Thank you for your continued support, and we look forward to your > > feedback > > > on this release! > > > > > >
