获取linux用户和组映射脚本

记录一下 python代码 #!/usr/bin/env python # -*- coding: utf-8 -*- import re import os import sys p = os.popen('id %s' % sys.argv[1]) s = p.read() # s = 'uid=486(yarn) gid=484(yarn) groups=484(yarn),493(hadoop),513(supergroup)' user =……

迁移Hadoop NameNode

版本:hadoop cdh5.4 传输文件 接收方 nc -l <span class="hljs-number">19999</span> <span class="hljs-string">| tar zxvf -</span> 发送方 tar czvf - ./current <span class="hljs-string">| nc serverip 19999</span> 迁移方案……

hdfs complete file 超时

修改一下超时次数,具体代码在 DFSOutputStream.java private void completeFile(ExtendedBlock last) throws IOException { long localstart = Time.now(); long localTimeout = 400; boolean fileComplete = false; int retries = dfsClient.getConf().nBlockWriteLocateFollowingRetry; while (!fileComplete) { fileComplete……