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Chris Lu
e98cbfc8f1
* seaweed-volume: async, buffered writes in VolumeEcShardsCopy The EC-shards-copy RPC handler wrote each streamed chunk to disk with a synchronous std::fs::File::write_all inside the async handler, blocking a Tokio worker thread for the duration of every write — noticeable for a large .ecx on a slow or busy disk. Factor the five near-identical receive-and-write loops (.ec shards, .ecx, .ecj, .vif, .ecsum) into drain_copy_stream_to_file, which uses tokio::fs + BufWriter for async, buffered I/O. Behavior is otherwise unchanged: the .ecj append mode, the .ecsum byte count and 0-byte-file cleanup, and all error messages are preserved. Claude-Session: https://claude.ai/code/session_01Ny5Rt1ph9VWeKmfY936GtF * seaweed-volume: remove partial copy target on error in EC-shards-copy Follow-up: drain_copy_stream_to_file now deletes the destination file on any recv/write/flush error, so a failed VolumeEcShardsCopy no longer leaves a truncated .ecNN/.ecx/.ecj/.vif/.ecsum on disk for a later reader to trip on. Matches receive_file / the Go volume server. Best-effort cleanup; the original stream error is still returned. Claude-Session: https://claude.ai/code/session_01Ny5Rt1ph9VWeKmfY936GtF