# Hot swapping

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83. Hot swapping
There are several options for hot reloading. The recommended approach is to use spring-boot-devtools as it provides additional development-time features such as support for fast application restarts and LiveReload as well as sensible development-time configuration (e.g. template caching). Devtools works by monitoring the classpath for changes. This means that static resource changes must be "built" for the change to take affect. By default, this happens automatically in Eclipse when you save your changes. In IntelliJ IDEA, Make Project will trigger the necessary build. Due to the default restart exclusions, changes to static resources will not trigger a restart of your application. They will, however, trigger a live reload.

83.4.1 Configuring Spring Loaded for use with Maven

To use Spring Loaded with the Maven command line, just add it as a dependency in the Spring Boot plugin declaration, e.g.

<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<version>1.2.6.RELEASE</version>
</dependency>
</dependencies>
</plugin>

http://docs.spring.io/spring-boot/docs/current/reference/html/howto-hotswapping.html

Elastic：data_hot,data_warm,data_cold角色有什么用
data_hot：热点数据节点，热点数据节点在进入es时存储时间序列数据，热层必须快速读取和写入，并且需要更多的硬件资源 data_warm；暖数据节点，存储不再定期更新但仍在查询的索引。查询两的频率通常低于索引出于热层时的频率，性能较低的硬件通常可用于此层中的节点 data_cold：冷数据节点，存储访问频率较低的只读索引，磁层使用性能较低的硬件，并且可以利用可搜索快照索引来最小化所需的资源
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Re9：读论文 DEAL Inductive Link Prediction for Nodes Having Only Attribute Information
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Some weights of the model checkpoint at mypath/bert-base-chinese were not used when initializing Ber
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SAP Batch Level Change
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Openstack no valid hot

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【每日一摩斯】-Index Skip Scan Feature (212391.1)
INDEX Skip Scan，也就是索引快速扫描，一般是指谓词中不带复合索引第一列，但扫描索引块要快于扫描表的数据块，此时CBO会选择INDEX SS的方式。
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