From 1eb54787a4bd25439069400d39d1d4f16cfba8ff Mon Sep 17 00:00:00 2001
From: heibaiying <31504331+heibaiying@users.noreply.github.com>
Date: Fri, 17 May 2019 15:21:20 +0800
Subject: [PATCH] =?UTF-8?q?Update=20Spark=E7=B4=AF=E5=8A=A0=E5=99=A8?=
=?UTF-8?q?=E4=B8=8E=E5=B9=BF=E6=92=AD=E5=8F=98=E9=87=8F.md?=
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notes/Spark累加器与广播变量.md | 19 ++++++++++---------
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# Spark 累加器与广播变量
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## 一、简介
-在Spark中,提供了两种类型的共享变量:累加器(accumulator)与广播变量(broadcast variable)。
+在Spark中,提供了两种类型的共享变量:累加器(accumulator)与广播变量(broadcast variable):
+ 累加器:用来对信息进行聚合,主要用于累计计数等场景;
+ 广播变量:主要用于在节点间高效分发大对象。