1 2 3 4 5 6 7 | class StorageLevel private( private var _useDisk: Boolean, //磁盘 private var _useMemory: Boolean, //这里其实是指堆内内存 private var _useOffHeap: Boolean, //堆外内存 private var _deserialized: Boolean, //是否为非序列化 private var _replication: Int = 1 //副本个数 ) |
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