<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/"><channel><title>Rollup on Plbear | 后端架构 · AI工程 · 云原生技术博客</title><link>https://www.plbear.com/tags/rollup/</link><description>Recent content in Rollup on Plbear | 后端架构 · AI工程 · 云原生技术博客</description><generator>Hugo</generator><language>zh-cn</language><lastBuildDate>Thu, 18 Mar 2021 09:00:00 +0800</lastBuildDate><atom:link href="https://www.plbear.com/tags/rollup/index.xml" rel="self" type="application/rss+xml"/><item><title>ES Rollup 预聚合：报表从 3 秒到 200ms</title><link>https://www.plbear.com/posts/2021-03-18-es-rollup-preaggregation/</link><pubDate>Thu, 18 Mar 2021 09:00:00 +0800</pubDate><guid>https://www.plbear.com/posts/2021-03-18-es-rollup-preaggregation/</guid><description>历史行为日志每天几千万条，报表 SQL 越跑越慢，直到 3 秒都出不来。Rollup 预聚合 + 每日滚动索引，把冷数据降采样成分钟级聚合桶，报表查询从 3~5 秒压到 200ms 以内，存储成本降了七成。</description></item></channel></rss>