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GP 6总体架构学习笔记
2022-07-31 16:14:00 【weixin_40455124】
- Master、Secondary 、Segment、Mirror都是pg实例
- 注意gp使用的pg有一定定制化的
- 实例间数据复制通过WAL日志模式实现
- 同一份数据的Mirror和Segment应该错开部署，避免在同一物理机器上
- 大规模数据导入、导出建议都通过外部表，而非copy模式 （Greenplum管理员指南6.2.1.pdf）提到copy都会通过master
- Secondary默认应该单独部署并且无其它任何任务以保障master出现问题后的快速切换
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