语言：Python特色：Workflows as code 上述两点结合，可以有动态流程 UI比较复杂

写时复制（Copy-on-write，简称COW） 性能优化策略 if you modify the second variable, Swift takes a full copy at that point so that only the second variable

更新jar包内class文件jar uvf hadoop-common-2.8.3-lg.jar org/apache/hadoop/fs/FileUtil.class

Kafka 2.8.0，移除了对Zookeeper的依赖，通过KRaft进行自己的集群管理Kafka 3.3.1 Mark KRaft as Production Ready Raft协议是当今最流行的分布式协调算法，Etcd、Consul等系统的基础，就来自于此。 总结一下其实

Ozone/HDDShttps://ozone.apache.org/docs/1.2.1/index.html 分布式存储 兼容S3对象存储API兼容HDFS使用RAFT协议 概念：Ozone consists of volumes, buckets, and keys.nam

Pandas 库基于 Python NumPy 库开发 train Example123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354

nmonnmonhttps://nmon.sourceforge.net/pmwiki.php?n=Site.Download nmon analyserhttps://nmon.sourceforge.net/pmwiki.php?n=Site.Nmon-Analyser ht

/etc/profile登录时执行并从/etc/profile.d目录的配置文件中搜集shell的设置 /etc/bashrc打开新的shell时 ~/.profile当用户登录时,该文件仅仅执行一次!默认情况下,他设置一些环境变量,执行用户的.bashrc文件. ~/.bash

Prometheus collects and stores its metrics as time series data Components Prometheus server: scrapes and stores time series data 单文件 alert

installpip install pyqt5 https://pythonpyqt.com/pyqt-hello-world/ create windowimport sysfrom PyQt5 import QtWidgets app = QtWidgets.QApplic