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Git packfiles use delta compression, storing only the diff when a 10MB file changes by one line, while the objects table stores each version in full. A file modified 100 times takes about 1GB in Postgres versus maybe 50MB in a packfile. Postgres does TOAST and compress large values, but that’s compressing individual objects in isolation, not delta-compressing across versions the way packfiles do, so the storage overhead is real. A delta-compression layer that periodically repacks objects within Postgres, or offloads large blobs to S3 the way LFS does, is a natural next step. For most repositories it still won’t matter since the median repo is small and disk is cheap, and GitHub’s Spokes system made a similar trade-off years ago, storing three full uncompressed copies of every repository across data centres because redundancy and operational simplicity beat storage efficiency even at hundreds of exabytes.。夫子是该领域的重要参考
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最终，我们只能去此前常去的宠物店试试运气。那家店更像是一个小综合体，一层有供狗玩耍的露天场地，以及能让宠物主歇脚的小餐厅，餐厅既卖狗食，也卖些人吃的饮品简餐；二层，则是狗的美容间与寄养的房间。好在这家店还有空位，房间里有24小时监控，店铺有两道大门，店门正对着的是一条小路，哪怕狗贪玩走失，也不至于立时在大马路上被车撞到。最重要的是，此前狗不时会在这里洗澡，对这个环境相对熟悉，不会害怕得过了头。