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Chris Lu
4f1d3a1f84
shouldMergeChunks only counted non-manifest chunk sizes toward the bloat threshold, so overlapping manifests accumulated undetected across flush cycles. During sustained random writes (e.g. fio), each metadata flush compacts non-manifest chunks and may group them into a new manifest via MaybeManifestize, while carrying forward all existing manifests. Since the merge condition only checked non-manifest totals against 2x file size, the growing pile of redundant manifests never triggered a merge. In a real workload: 4 GB file, 25 manifests each covering ~4 GB (107 GB manifest data on volume servers), but shouldMergeChunks saw only 4.2 GB of non-manifest chunks vs the 8.6 GB threshold -- no merge. Fix: include manifest coverage sizes in totalChunkSize. This correctly detects the 111 GB total vs 8.6 GB threshold and triggers the merge, which re-reads the file as clean chunks and lets the filer's MinusChunks (which resolves manifests) garbage-collect all redundant sub-chunks.