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Summary: - Add a blog post explaining FIFO KV-ratio compaction for BlobDB-backed TTL workloads. - Describe why the existing FIFO intra-L0 picker can repeatedly compact small BlobDB SST files and how the new KV-ratio target plus tiered merging strategy works. - Add diagrams for the old picker behavior and the KV-ratio tiering flow, along with the required blog author metadata. ## Testing - `git diff --check upstream/main...HEAD` Pull Request resolved: https://github.com/facebook/rocksdb/pull/14871 Reviewed By: joshkang97 Differential Revision: D109243987 Pulled By: xingbowang fbshipit-source-id: 7ad07953f38c55c77ffb6510824ba8500db78c0e