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O'Reilly Platform
book
Presto实战
by
Matt Fuller
,
Manfred Moser
,
Martin Traverso
March 2021
Intermediate to advanced
265 pages
6h 50m
Chinese
Posts & Telecom Press
Content preview from
Presto实战
生产环境部署
|
69
为了使用
Presto
,允许
JDK/JVM
吸附(
attach
)到自身的选项在升级到
Java11
后是必需的。
关于内存和其他
JVM
设定的更多信息,参见第
12
章。
5.6
启动器
如第
2
章所述,
Presto
在
bin
目录下提供了用于启动和管理
Presto
的脚本。这些脚本需要
Python
才能运行。
run
命令可用于在前台启动
Presto
进程。
在生产环境,你通常将
Presto
作为一个后台守护进程启动:
$ bin/launcher start
Started as 48322
上述例子中的数值
48322
是进程的
ID
(
PID
),每次启动时都会改变。
你可以使用
stop
命令终止一个运行中的
Presto
服务器,这会使它优雅地关闭:
$ bin/launcher stop
Stopped 48322
当一个
Presto
服务器进程被锁死或遇到其他错误时,可以使用
kill
命令强制终止它:
$ bin/launcher kill
Killed 48322
你可以使用
status
命令获取
Presto
的运行状态和
PID
:
$ bin/launcher status
Running as 48322
如果
Presto
进程没在运行,则
status
命令返回以下信息:
$ bin/launcher status
Not running
除了上述命令,启动器脚本还支持许多其他选项,它们可用于自定义配置文件的位置和其
他参数。可以使用
--help
选项来显示完整的信息:
$ bin/launcher --help
Usage: launcher ...
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Publisher Resources
ISBN: 9787115560056