Features Column-oriented time-series database. Log-structured append-only B+tree with multiversion concurrency control. Crash safety. Fast aggregation without pre-configured rollups or materialized views. Custom compression algorithm (dictionary + en
原文链接:http://www.jianshu.com/p/0bafd0168647 OpenTSDB介绍 1.1.OpenTSDB是什么?主要用途是什么? 官方文档这样描述:OpenTSDB is a distributed, scalable Time Series Database (TSDB) written on top of HBase: 翻译过来就是,基于Hbase的分布式的,可伸缩的时间序列数据库. 主要用途,就是做监控系统:譬如收集大规模集群(包括网络设备.操作系统.应用程序)
然后执行启动定时任务目录:etc/crontab SHELL=/bin/bashPATH=/sbin:/bin:/usr/sbin:/usr/binMAILTO=rootHOME=/ # For details see man 4 crontabs # Example of job definition:# .---------------- minute (0 - 59)# | .------------- hour (0 - 23)# | | .---------- day of month
Cattell [6] maintains a great summary about existing Scalable SQL and NoSQL data stores. Hu [18] contributed another great summary for streaming databases. Druid feature-wise sits some- where between Google’s Dremel [28] and PowerDrill [17]. Druid ha