PipelineDB
安装
yum install https://s3-us-west-2.amazonaws.com/download.pipelinedb.com/pipelinedb-0.9.8u2-centos7-x86_64.rpm
或
sudo rpm -ivh pipelinedb-0.9.8u2-centos7-x86_64.rpm
初始化
pipeline-init -D <data directory>
启动
pipeline-ctl -D /var/lib/pgsql/pipeline/data -l logfile start
激活
psql -h localhost -p 5432 -d pipeline -c "ACTIVATE
修改配置文件
pipelinedb.conf 类似于postgres的 postgresql.conf
pg_hba.conf
登录
psql -h localhost -p 5432 -d pipeline
主从搭建
http://docs.pipelinedb.com/replication.html
与kafka集成的流式计算
https://www.pipelinedb.com/blog/sql-on-kafka
https://github.com/digoal/blog/blob/1acc4e721e8e320facc13a6980f50339f6fe71cd/201510/20151021_02.md
效果无敌
遇到问题，
url 正则不匹配时pipelinedb直接挂掉
创建滑窗
CREATE CONTINUOUS VIEW message_count_hour WITH （sw = '1 hour',step_factor = 20) AS SELECT COUNT(*) FROM logs_stream;
sw 滑窗大小，时间
step_factor 百分比，一个滑窗内多久为一个单位