Hi everyone, With no further discussion, the vote on CEP-66: Zero-copy SSTable splitting is complete.
+1 binding: *16* +1 non-binding: *2* 0: *0* -1: *0* With at least three binding +1 votes and no binding vetoes, the vote passes. Vote thread: https://lists.apache.org/thread.html/gg909ydhh7n0p94cwg6gm18fv1xl3lfy Thanks to everyone who voted and contributed to the discussion. Chris On Thu, Oct 1, 2026 at 6:56 PM Chris Lohfink <[email protected]> wrote: > I’ll answer them in the DISCUSS thread so the technical discussion stays > together. > > Chris > > On Thu, Oct 1, 2026 at 5:08 PM Benedict Elliott Smith <[email protected]> > wrote: > >> Hi Chris, >> >> Did you miss my email[1] on the DISCUSS thread? Abe partially responded >> to it, and I found his answer to this part satisfactory, but I would >> appreciate discussing the remaining items before we move to a VOTE. >> >> Thanks >> >> https://lists.apache.org/thread.html/07c52dv46xk4hynknfb42kkh424r3o1y >> >> On 2026-09-28 20:40 UTC Chris Lohfink wrote: >> > I'd like to call a vote on CEP-66: Zero-copy SSTable splitting. >> > >> > The proposal splits eligible compressed SSTables by reusing their >> encoded >> > compression chunks and rebuilding the child components, avoiding a row >> > rewrite. It starts with an opt-in sstablesplit --zero-copy mode for >> split >> > tool and BIG-format SSTables on Cassandra 7.0/trunk. Reflinks provide an >> > additional optimization where supported; otherwise, Cassandra copies the >> > encoded bytes. Follow-up incremental phases cover Spark support, >> > anticompaction, BTI, 2i, and partial-range zero copy streaming. >> > >> > The discussion covered the new SSTable format, compatibility, reflink >> > complexity, and digest generation. The proposal and discussion are here: >> > >> > Proposal: >> > >> https://cwiki.apache.org/confluence/spaces/CASSANDRA/pages/451972773/draft+CEP-66+Zero-copy+SSTable+splitting >> > < >> https://cwiki.apache.org/confluence/spaces/CASSANDRA/pages/451972773/draft+CEP-66+Zero-copy+SSTable+splitting >> > >> > >> > Discussion: >> > https://lists.apache.org/thread/sjqbv0m451kqopms8whymgwbrr2v16tw >> > <https://lists.apache.org/thread/sjqbv0m451kqopms8whymgwbrr2v16tw> >> > >> > Please cast your vote in this thread. The vote will remain open for at >> > least 72 hours, longer if needed. Per the CEP process, adoption requires >> > three binding +1 votes and no binding vetoes. >> > >> > Thanks, >> > Chris >> > >> >
