https://blog.youkuaiyun.com/February13zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/February13/article/details/135550448https://blog.youkuaiyun.com/February13/article/details/135550448February13Fri, 12 Jan 2024 13:30:53 +0800https://blog.youkuaiyun.com/February13/article/details/133752369https://blog.youkuaiyun.com/February13/article/details/133752369February13Tue, 10 Oct 2023 17:24:13 +0800https://blog.youkuaiyun.com/February13/article/details/132756661https://blog.youkuaiyun.com/February13/article/details/132756661February13Sat, 23 Sep 2023 11:26:17 +0800https://blog.youkuaiyun.com/February13/article/details/133200314https://blog.youkuaiyun.com/February13/article/details/133200314February13Sat, 23 Sep 2023 11:18:03 +0800https://blog.youkuaiyun.com/February13/article/details/132327988https://blog.youkuaiyun.com/February13/article/details/132327988February13Sat, 19 Aug 2023 22:29:47 +0800https://blog.youkuaiyun.com/February13/article/details/132135744https://blog.youkuaiyun.com/February13/article/details/132135744February13Sun, 06 Aug 2023 21:20:11 +0800https://blog.youkuaiyun.com/February13/article/details/132051427https://blog.youkuaiyun.com/February13/article/details/132051427February13Tue, 01 Aug 2023 23:29:35 +0800https://blog.youkuaiyun.com/February13/article/details/131949512https://blog.youkuaiyun.com/February13/article/details/131949512February13Sun, 30 Jul 2023 19:01:39 +0800https://blog.youkuaiyun.com/February13/article/details/131970809https://blog.youkuaiyun.com/February13/article/details/131970809February13Thu, 27 Jul 2023 23:57:58 +0800https://blog.youkuaiyun.com/February13/article/details/131748386https://blog.youkuaiyun.com/February13/article/details/131748386February13Sun, 16 Jul 2023 12:41:07 +0800https://blog.youkuaiyun.com/February13/article/details/131745237https://blog.youkuaiyun.com/February13/article/details/131745237February13Sat, 15 Jul 2023 23:10:56 +0800https://blog.youkuaiyun.com/February13/article/details/131732473https://blog.youkuaiyun.com/February13/article/details/131732473February13Sat, 15 Jul 2023 18:24:45 +0800https://blog.youkuaiyun.com/February13/article/details/131670613https://blog.youkuaiyun.com/February13/article/details/131670613February13Tue, 11 Jul 2023 22:58:29 +0800https://blog.youkuaiyun.com/February13/article/details/131668230https://blog.youkuaiyun.com/February13/article/details/131668230February13Tue, 11 Jul 2023 22:22:40 +0800https://blog.youkuaiyun.com/February13/article/details/131623789https://blog.youkuaiyun.com/February13/article/details/131623789February13Sun, 09 Jul 2023 17:06:14 +08001. RDD缓存 ,把某个RDD保留，rdd.cache() 缓存到内存，rdd.persist(StorageLevel.DISK_ONLY_2) 缓存到本地硬盘上,2个副本，不支持存HDFS，保留血缘关系。-> 2.RDD Checkpoint 仅支持存硬盘，设计上安全，不保留血缘关系（后台执行计划可体现）RDD迭代链条中只有最新的RDD，旧RDD会销毁，节省内存空间。缓存的原理是写到对应节点的服务器上的本地内存或磁盘上。追溯旧RDD是依照血缘关系，使用持久化技术。]]>https://blog.youkuaiyun.com/February13/article/details/131524221https://blog.youkuaiyun.com/February13/article/details/131524221February13Sun, 09 Jul 2023 15:54:59 +0800https://blog.youkuaiyun.com/February13/article/details/131622900https://blog.youkuaiyun.com/February13/article/details/131622900February13Sun, 09 Jul 2023 15:20:49 +0800https://blog.youkuaiyun.com/February13/article/details/131524383https://blog.youkuaiyun.com/February13/article/details/131524383February13Mon, 03 Jul 2023 21:50:05 +0800https://blog.youkuaiyun.com/February13/article/details/131506752https://blog.youkuaiyun.com/February13/article/details/131506752February13Sun, 02 Jul 2023 23:10:51 +0800https://blog.youkuaiyun.com/February13/article/details/131506711https://blog.youkuaiyun.com/February13/article/details/131506711February13Sun, 02 Jul 2023 23:03:22 +0800