1. V2 Data Engine (Experimental)

   • OS Supportability
     • Talos Support ✅
   • Performance
     • Configurable CPU Cores ✅
   • Scheduling
     • Data Locality ✅
   • Data Recovery
     • Replica Rebuilding
       • Delta Replica Rebuilding using Snapshot Checksum: SPDK ✅
       • Delta Replica Rebuilding using Snapshot Checksum: Data and Control Planes
     • Auto Salvage ✅
     • Disaster Recovery Volume ✅
   • Backing Image
     • Backing Image Volume: Download and Upload ✅
   • Volume Operations
     • Volume Live Migration ✅
     • Volume Encryption

2. Multiple Backup Stores ✅

3. Support Longhorn Installation by Helm Controller ✅

1. V2 Data Engine (Experimental)

   • Performance
     • UBLK frontend support
   • Rebuilding
     • Delta Replica Rebuilding using Delta Snapshot: SPDK
     • Delta Replica Rebuilding using Delta Snapshot: Control and Data Planes
   • Upgrade
     • Volume Live Upgrade - Control Plane
   • Volume Cloning
   • Zero-Copy Volume Cloning
   • Volume Expansion
   • Storage network
   • Backing image
     • Encryption
     • Backup and restore

2. RWX Share Manager HA (GA)

1. V2 Data Engine Sharding (Experimental)
2. Offline Replica Rebuilding
3. Volume Group
   • Application consistent backup and restore
   • Soft/Hard anti-affinity option for the volume group
4. V1 Data Engine Performance Improvement
   • New frontend (ublk)
   • New engine/replica-replica protocol
5. Resource Constraint Strategy
6. Replica Scheduling with Multiple Factors
7. In-Cluster Cold Volume Migration from v1 to v2 Data Engine

1. V2 Data Engine Sharding (GA)
2. Third-party Backup via Webhook HTTP/2
3. LVM-based Local Volume
4. V2 Dynamic Scheduler

TBU

1. Longhorn Engine v2 (Preview)
   • Online Replica Rebuilding✅
   • Volume Live Upgrade - Data Plane✅
   • Volume Trim✅
   • Block-type Disk Supports SPDK AIO, NVMe and VirtIO Bdev Drivers✅
2. Container-Optimized OS Support✅
3. RWX Share Manager HA (Experimental)✅
4. Backing Image-based Volume Encryption✅
5. Disk-based Replica Auto Rebalancing✅
6. Longhorn CLI✅
7. v1 Data Engine General Performance Improvement✅
8. Support Periodic and On-Demand Full Backups to Enhance Backup Reliability✅
9. Volume Cloning Enhancement✅
10. Use fsfreeze Instead of sync Before Snapshot✅

1. Longhorn Data Engine v2 - Preview
   • Snapshot & Revert
   • Backup & Restore
   • Non-disruptive volume during IM pod restart
   • ARM64 Support
2. Block Volume Encryption
3. Talos Support
4. OKD Support
5. Backing Image Backup & Restore
6. Node Drain Policy Improvement
7. Snapshot Space Management
8. Non-Disruptive Volume-related Setting Update

1. Longhorn Engine v2 base on SPDK - Preview
2. Cluster Autoscaler - GA
3. Instance Manager Engine/Replica Consolidation
4. Auto Trim via Recurring Job
5. RWX Volume Trim
6. Azure Blob Storage Backup Store
7. CIFS Backup Store
8. Backup Compression Methods
9. Upgrade Path Enforcement
10. Backing Image Management via CSI VolumeSnapshot
11. Kubernetes Upgrade Node Drain Policy
12. Snapshot Delete/Cleanup Recurring Jobs

1. Reclaim/Trim volume space
2. Longhorn system backup & restore
   • Support rollback due to e.g. upgrade failure
   • Support reinstalling Longhorn system without deleting data on disk.
3. Replica snapshot rebuilding speedup
   • Rebuild with ahead-of checksum
   • Improve rebuild sensitivity due to intermittent timeout
4. Online volume expansion
5. K8s 1.25 support (PSP replacement)
6. Data integrity improvement
   • Data integrity improvement based on volume head + snapshots
   • Snapshot ahead-of checksum
   • Bit Rot protection to avoid data degradation based on snapshot-based checksum
7. Support bundle enhancement
8. Local volume via Data Locality strict mode
9. RWX support - GA
10. ARM64 support - GA

1. CSI Snapshot support for Longhorn snapshot
2. Kubernetes native API support w/ Admission and Conversion Webhooks
3. Storage network
4. Backing image download
5. Secured communication (mTLS) among control/data plane components
6. Upgrade path enhancement
7. Resource-efficient snapshot purge
8. Public Cloud managed Kubernetes Cluster support
9. s390x support (experimental)

1. Encryption.
   1. At rest, in transit, and backup.
2. Backing image support
   1. Including uploading and creating a backing image from a volume.
3. Volume clone

1. More improvements to Kubernetes node failure handling.
   1. Implement automatic recovery for the StatefulSets.
2. Automatically remove the node when the node is removed from Kubernetes.
3. Support moving the disk to another node automatically, e.g. for AWS ASG.
4. Rebuild based on the existing replica after the node is temporarily disconnected.
5. Pause replica rebuild for server maintenance
6. Replica eviction for the nodes/disks.
7. Native RWX support, via NFS
8. Performance metrics, including Prometheus support.
9. Alert and notification
10. CSI snapshooter support
11. Support the Data Locality option always to keep a replica local to the engine
12. Improvement performance via removing the revision counter
13. ARM support (experimental). ✅