Hi Jark, Thanks a lot for reviewing FIP-33 and for the support.
Glad to hear the overall design looks good to you. I’ll keep collecting feedback from the community, and if there are no major concerns, I’ll move forward with the vote for Phase 1. Best, Liu Han On Fri, Mar 27, 2026 at 2:53 PM Jark Wu <[email protected]> wrote: > Hi Liu Han, > > Thanks for driving this proposal. I've reviewed FIP-33 and the overall > design looks good to me (LGTM). > > Looking forward to the vote and follow-up phases. > > Best, > Jark > > > On Wed, 25 Mar 2026 at 22:55, liu han <[email protected]> wrote: > > > > liu han <[email protected]> > > 5:08 PM (5 hours ago) > > to dev > > Hi devs, > > > > I'd like to start a discussion about FIP-33: JBOD Phase 1 - Local > > Multi-Directory Support [1]. > > > > Fluss currently assumes a single `data.dir` on each TabletServer. This > > works for single-disk deployments, but it does not make good use of > servers > > with multiple local disks, where we would like to better utilize > available > > disk capacity and I/O bandwidth. > > > > To support JBOD incrementally and keep the design low-risk, we plan to > > introduce it in three phases: > > > > 1. Phase 1: Local Multi-Directory Support > > 2. Phase 2: Single-Disk Failure Isolation > > 3. Phase 3: Inter-Disk Data Rebalancing > > > > This FIP focuses on Phase 1 only. > > > > The goal of Phase 1 is to enable multiple local data directories on > > TabletServer, support static bucket placement across directories, recover > > bucket placement after restart, and keep `log + kv` co-located for > primary > > key tables, while remaining compatible with the existing single-directory > > deployment model. > > > > This phase does not introduce metadata, RPC, protobuf, or coordinator > > changes. It also does not cover disk failure isolation or inter-disk > > migration, which are planned for later phases. > > > > Any feedback and suggestions are welcome! > > > > [1] > > > https://cwiki.apache.org/confluence/display/FLUSS/FIP-33%3A+JBOD+Phase+1+-+Local+Multi-Directory+Support >
