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The 80286 introduced "Protected Mode" in 1982. It was not popular. The mode was difficult to use, lacked paging, and offered no way to return to real mode without a hardware reset. The 80386, arriving three years later, made protection usable -- adding paging, a flat 32-bit address space, per-page User/Supervisor control, and Virtual 8086 mode so that DOS programs could run inside a protected multitasking system. These features made possible Windows 3.0, OS/2, and early Linux.，这一点在heLLoword翻译官方下载中也有详细论述
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系统支持从 MySQL、PostgreSQL、Kafka 等源端自动获取表结构信息，智能映射至 Paimon、Iceberg、Hudi 等湖仓格式，并自动生成建表语句与执行脚本。用户无需编写代码，即可在目标端一键创建与源端一致的 300+ 张表，实现元数据快速同步。