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Event Logging
Event Logging StatsD Logging Event Logging Superset by default logs special action events in its internal database (DBEventLogger). These logs can be accessed on the UI by navi... -
Object States
Detecting Object State Persisting an object Updating an object Deleting an object Possible state transitions JDO manages the lifecycle of an object, from creation (Transient ... -
Relation
countBy difference differenceWith unionWith union gt gte intersection lt lte max min propEq sortBy pathEq maxBy minBy countBy (a → String) → [a] → {*} Paramet... -
Check DNS and NSCD
All hosts in your system must be configured for both forward and and reverse DNS. If you are unable to configure DNS in this way, you should edit the /etc/hosts file on every hos... -
External Link Management
Background How to create the external link Where can see the external link Background In production practice, in order to manage the Flink job properly, there is always a need... -
JDO v JPA : ORM
Relationships There are 2 prevalent specification in the Java ORM world. JDO provides the most complete definition, whilst JPA is the most recent. Relationships In this guide w... -
Performance
Read performance Write performance Accumulo can be tuned to improve read and write performance. Read performance Enable caching on tables to reduce reads to disk. Enable b... -
Installing MySQL
About This Task Before You Begin Steps About This Task You can install MySQL 5.5 or later. Before You Begin On the Ambari host, install the JDBC driver for MySQL, and then... -
脚注
注意： 该语法是扩展语法，实际使用时请注意采用的Markdown解析工具是否支持。 源码 <div id = "#fn_x" > Pandoc - Pandoc User’s Guide - Footnotes markdown-it/markdown-it-footnote: Footnotes plugin for markdown... -
Memory Requirements
The Ambari host should have at least 1 GB RAM, with 500 MB free. To check available memory on any host, run: free - m If you plan to install the Ambari Metrics Service (AMS...