可以断定，这风来自宇宙，来自地球四季轮替的铁律，尽管它悄然而至，却也挟带了无限辽远的信息：那是冰层坼裂的轰鸣，是万千根须在黑暗中摸索的窸窣，是无数生命在挣脱与拥抱之间那甜蜜的喘息。这春风，哪里仅是地理上的气流？它分明是时间本身最温柔的手，在徐徐推动着生的轮回。它将逝去的冬，酿成滋养新生的腐殖；它将枯寂的枝条，吹成待放的蓓蕾。在这永不停歇的循环中，生老病死的面目似乎并不那么可怖，它成了一个必要的休止符，一次深长的呼吸，一切的一切，无非都是为了下一句更嘹亮的歌唱。
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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.
This article originally appeared on Engadget at https://www.engadget.com/science/space/the-astronaut-whose-illness-forced-an-early-return-from-the-iss-was-mike-fincke-163752239.html?src=rss