2015年4月14日
Understanding Hadoop Clusters and the Network
摘要： This article is Part 1 in series that will take a closer look at the architecture and methods of a Hadoop cluster, and how it relates to the network a... 阅读全文
posted @ 2015-04-14 11:31 JackyKen 阅读(218) 评论(0) 推荐(0) 编辑
hdfs 数据块重分布 sbin/start-balancer.sh -threshold
摘要： 数据块重分布sbin/start-balancer.sh -threshold percentage of disk capacityHDFS达到平衡状态的磁盘使用率偏差值值越低各节点越平衡，但消耗时间也更长 阅读全文
posted @ 2015-04-14 11:12 JackyKen 阅读(1082) 评论(0) 推荐(0) 编辑
hdfs[命令] fsck
摘要： Usage: DFSck [-list-corruptfileblocks | [-move | -delete | -openforwrite] [-files [-blocks [-locations | -racks]]]] start checking from this... 阅读全文
posted @ 2015-04-14 11:06 JackyKen 阅读(350) 评论(0) 推荐(0) 编辑
hdfs[命令] dfsadmin
摘要： Usage: java DFSAdminNote: Administrative commands can only be run as the HDFS superuser. [-report] [-safemode enter | leave | get ... 阅读全文
posted @ 2015-04-14 11:03 JackyKen 阅读(874) 评论(0) 推荐(0) 编辑
hdfs[命令] dfs
摘要： Usage: hadoop fs [generic options] [-appendToFile ... ] [-cat [-ignoreCrc] ...] [-checksum ...] [-chgrp [-R] GROUP PATH... 阅读全文
posted @ 2015-04-14 10:58 JackyKen 阅读(1271) 评论(0) 推荐(0) 编辑
Hadoop2.0新特性-持续追加【干货】
摘要： 1、NAME NODE HA2、NAME NODE Federation3、HDFS 快照（目录快照）4、HDFS 缓存5、HDFS ACL6、异构层级存储结构----------------------------------------------------------------------... 阅读全文
posted @ 2015-04-14 10:48 JackyKen 阅读(1175) 评论(0) 推荐(0) 编辑