Hi Vishnu, On Tue, Dec 31, 2024 at 10:35 PM Vishnu ks <ksvishnu56@xxxxxxxxx> wrote: > > Dear Community, > > I would like to propose a discussion topic regarding the enhancement > of block layer tracepoints, which could fundamentally transform how > backup and recovery systems operate on Linux. > > Current Scenario: > > - I'm developing a continuous data protection system using eBPF to > monitor block request completions This makes little sense. It is not clear how this works. > - The system aims to achieve reliable live data replication for block devices > Current tracepoints present challenges in capturing the complete > lifecycle of write operations What's the difference between this approach and existing data replication solutions, such as md/raid? > > Potential Impact: > > - Transform Linux Backup Systems: > - Enable true continuous data protection at block level > - Eliminate backup windows by capturing changes in real-time > - Reduce recovery point objectives (RPO) to near-zero > - Allow point-in-time recovery at block granularity > > Current Technical Limitations: > > - Inconsistent visibility into write operation completion > - Gaps between write operations and actual data flushes > - Potential missing instrumentation points If a tracepoint is missing or misplaced, we can fix it in a patch. > - Challenges in ensuring data consistency across replicated volumes > > Proposed Improvements: > > - Additional tracepoints for better write operation visibility > - Optimal placement of existing tracepoints > - New instrumentation points for reliable block-level monitoring Some details in these would help this topic proposal. Thanks, Song
