March 2021
Intermediate to advanced
265 pages
6h 50m
Chinese
Content preview from Presto实战
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68
｜
第
5
章
下面是一个简单的示例文件：
node.environment=production
node.id=ffffffff-ffff-ffff-ffff-ffffffffffff
node.data-dir=/var/presto/data
支持的
Presto
配置属性如下所示。
node.environment=demo
运行环境的名称（
必填项
）。
Presto
集群里的所有节点必须拥有同一个环境名，该名称
显示在
Presto
WebUI
的标题部分。
node.id=some-random-unique-string
当前
Presto
安装实例的唯一识别符（可选项）。每个节点都必须拥有不同的唯一标识。
如果想要在
Presto
节点重启和升级时保持一致的标识
，则需要指定该属性。如果不指定
此属性，每次重启时都会生成一个新的随机标识。
node.data-dir=/var/presto/data
Presto
存储日志文件和其他数据的文件系统目录（可选项），默认为安装目录下的
var
文
件夹。
5.5
JVM
配置
JVM
配置文件
etc/jvm.config
包含用于启动
Presto
所在
JVM
的命令行选项列表。
这个文件包含一系列的选项，每个选项占据一行。这些选项不是由
shell
解析的，
因此包含
空格和其他特殊字符的选项无须用引号括起来。
下面的内容是创建
etc/jvm.config
的良好起点：
-server
-mx16G
-XX:+UseG1GC
-XX:G1HeapRegionSize=32M
-XX:+UseGCOverheadLimit ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.