doris

Files

HaiBo Li 5f43fb3bde [Cache][BE] LRU cache for sql/partition cache #2581 (#4005 )

1. Find the cache node by SQL Key, then find the corresponding partition data by Partition Key, and then decide whether to hit Cache by LastVersion and LastVersionTime
2. Refers to the classic cache algorithm LRU, which is the least recently used algorithm, using a three-layer data structure to achieve
3. The Cache elimination algorithm is implemented by ensuring the range of the partition as much as possible, to avoid the situation of partition discontinuity, which will reduce the hit rate of the Cache partition,
4. Use the two thresholds of maximum memory and elastic memory to control to avoid frequent elimination of data

2020-09-20 20:50:51 +08:00

administrator-guide

[Cache][BE] LRU cache for sql/partition cache #2581 (#4005 )

2020-09-20 20:50:51 +08:00

community

[website] modify download links & remove some links' suffix _EN(master) (#3573 )

2020-05-15 14:03:28 +08:00

developer-guide

[Doc] Update doc of fe-idea-dev.md (#4485 )

2020-08-31 10:09:10 +08:00

downloads

[website] modify download links & remove some links' suffix _EN(master) (#3573 )

2020-05-15 14:03:28 +08:00

extending-doris

Support udaf_orthogonal_bitmap (#4198 )

2020-08-19 10:29:13 +08:00

getting-started

[SQL][Function] Add approx_count_distinct() function (#4221 )

2020-08-01 17:54:19 +08:00

installing

[License] Organize and modify the license of the code (#4371 )

2020-08-24 21:51:55 +08:00

internal

Update support batch delete storage design document (#4234 )

2020-08-18 15:37:14 +08:00

sql-reference

[SQL] Support where, limit, order clause in show resourcestmt. (#4502 )

2020-09-16 17:57:48 +08:00

README.md

[License] Organize and modify the license of the code (#4371 )

2020-08-24 21:51:55 +08:00

README.md

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欢迎使用

Apache Doris

支持对海量大数据进行快速分析的MPP数据库

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Apache Doris

Apache Doris是一个现代化的MPP分析型数据库产品。仅需亚秒级响应时间即可获得查询结果，有效地支持实时数据分析。Apache Doris的分布式架构非常简洁，易于运维，并且可以支持10PB以上的超大数据集。

Apache Doris可以满足多种数据分析需求，例如固定历史报表，实时数据分析，交互式数据分析和探索式数据分析等。令您的数据分析工作更加简单高效！

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了解更多

/zh-CN/getting-started/basic-usage

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Apache Doris 核心特性

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现代化MPP架构	/images/home/struct.png

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秒级查询返回延时	/images/home/clock.png

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支持标准SQL语言，兼容MySQL协议	/images/home/sql.png

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向量化执行器	/images/home/program.png

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高效的聚合表技术	/images/home/aggr.png

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新型预聚合技术Rollup	/images/home/rollup.png

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高性能、高可用、高可靠	/images/home/cpu.png

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极简运维，弹性伸缩	/images/home/dev.png

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Apache Doris 用户

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/images/home/logo-meituan.png	美团

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/images/home/logo-xiaomi.png	小米

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/images/home/logo-jd.png	京东

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/images/home/logo-huawei.png	华为

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/images/home/logo-baidu.png	百度

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/images/home/logo-weibo.png	新浪微博

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/images/home/logo-zuoyebang.png	作业帮

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/images/home/logo-vipkid.png	Vipkid

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/images/home/logo-360.png	360

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/images/home/logo-shopee.png	Shopee

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/images/home/logo-tantan.png	探探

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/images/home/logo-kuaishou.png	快手

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/images/home/logo-sohu.png	搜狐

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/images/home/logo-yidian.png	一点资讯

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/images/home/logo-dingdong.png	叮咚买菜

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/images/home/logo-youdao.png	有道

快速上手 →

/zh-CN/installing/compilation