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Flink学习第一天——什么是批量、流式计算?
2022-07-30 03:54:00 【qq_16397653】
批量计算(batch computing)
- 批处理:对一定规模量的数据进行处理,类似搬砖,10个10个的搬
- 场景:离线数据统计、报表分析等(过去1年 10000亿条日志,分析日、周、月,接口响应延迟 状态码)
- 特点:批量计算非实时、高延迟,计算完成后才可以得到结果
- 框架:Hadoop MapReduce
- 流式计算(stream computing)
- 框架:Spark(宏观上)、Flink
- 场景:实时监控、实时风控等
- 特点:流式计算实时、低延迟,实时取最新的结果
- 流处理:对源源不断的数据流进行处理,类似水龙头出水
区分( 离线计算和实时计算 + 流式计算和批量计算)
- 离线计算和实时计算 :是对数据处理的【延迟】不一样(一个实时和一个非实时)
- 流式计算和批量计算: 是对数据处理的【方式】不一样(一个流式和一个批量)
- 结论:离线和批量不等价,实时和流式不等价,因为不是同个维度的东西
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