hypertable

** postgresql数据库 TimescaleDB 定时压缩超表 删除超表（块） ** 在工作中 使用postgresql数据库 TimescaleDB 时序库进行存储实时数据，采集的数据量过大，提供的内存不足，因此考虑如何保存数据 TimescaleDB数据库中的超级表 TimescaleDB数据库自身带着函数就可以实现 ** TimescaleDB数据库所携带函数 一 .压缩 SELECT compress_chunk（） ** 为了尽量不丢失数据，避免删除数据 我首先考虑把数据压缩，用他自带的函数 SELECT compress_chunk（） 1查询时间 show_chunks（） CREATE OR REPLACE FUNCTION "hrmw" . "show_chunks" ( "hypertable" regclass = NULL ::regclass , "older_than" any = NULL ::unknown , "newer_than" any = NULL ::unknown ) RETURNS SETOF "pg_catalog" . "regclass" AS '$libdir/timescaledb-1.7.1' , 'ts_chunk_show_chunks' LANGUAGE c STABLE COST 1 ROWS 1000

本文作者：HelloDeveloper 在 4 月 7 日由 @百度 主办、 @InfoQ 策划组织和实施的第 25 期百度技术沙龙活动上，来自百度数据流计算系统 DStream 项目负责人杨栋（ @Sherlock__Yang）、58 同城 (58.com) 云平台技术负责人，58 同城技术中心架构部架构师徐振华（ @浊者）分别分享了各自在海量数据存储和处理上取得的成果及经验，话题涉及“Hypertable Goes Realtime at Baidu”，以及“58 同城在分布式存储方面的架构实践”等。本文将对他们各自的分享做下简单的回顾，同时提供相关资料的下载。 主题一：Hypertable Goes Realtime at Baidu（微盘下载讲稿） 来自百度数据流计算系统 DStream 项目负责人杨栋第一个为大家分享，本次演讲的主要内容包括：Hypertable 能够满足应用的哪些需求、实际应用中遇到的挑战有哪些、可靠性 or 性能、如何应对这些挑战以及 Hypertable 和 HBase 有哪些异同。杨栋提到，在 Noah 系统最初建设时，主要遇到了以下的问题： MySQL Not inherently distributed（数据的无序增长、频繁地手工分配数据）；表大小的限制；不够灵活的结构 Hadoop 不支持随机写入；随机读取的支持也不理想 由此

Hey, i am starting a hadoop based hypercube with a flexible number of dimensions. Does anybody know any existing approaches for this? I just found PigOLAPSketch , but there is no code to use it. Another approach is Zohmg from lastfm, which uses hbase, but seems to be very dead. I think i will start a pig solution, maybe you have some advices? This would be very cool/useful. OpenTSDB is an HBase time-series database that might be interesting to look at, they have a clever approach to secondary indexing. You can also look at gpu based database https://www.kinetica.com/ but this is not open

Sorry if this question is somewhat subjective. I am new to 'could store', 'distributed store' or some concepts like this. I really wonder what do they have in common and want to get an overview on all of them. What do I need to prepare if I want to write a product similar to this? The NoSQL Database site summarizes the concept like this: Next Generation Databases mostly address some of the points: being non-relational, distributed, open-source and horizontal scalable. The original intention has been modern web-scale databases. The movement began early 2009 and is growing rapidly. Often more