[hadoop@hostname /home/q/hadoop/hadoop-2.3.0-cdh5.1.0]$ ./bin/hdfs fsck / 14/10/23 11:17:31 WARN ssl.FileBasedKeyStoresFactory: The property 'ssl.client.truststore.location' has not been set, no TrustStore will be loaded Connecting to namenode via http://hostname:50070 FSCK started by hadoop (auth:SIMPLE) from /192.168.28.11 for path / at Thu Oct 23 11:17:32 CST 2014 ............................................................................................Status: HEALTHY Total size: 91509994 B (Total open files size: 99 B) Total dirs: 162 Total files: 92 Total symlinks: 0 (Files currently being written: 11) Total blocks (validated): 92 (avg. block size 994673 B) (Total open file blocks (not validated): 11) Minimally replicated blocks: 92 (100.0 %) 满足最小备份要求的块数量 Over-replicated blocks: 0 (0.0 %) Under-replicated blocks: 0 (0.0 %) 不满足备份数量要求的块叫备份不足块，HDFS会自动修复丢失的备份，用现存的可用备份生成新的备份 Mis-replicated blocks: 0 (0.0 %) Default replication factor: 3 备份因子 Average block replication: 3.0 Corrupt blocks: 0 损坏块数量，是指没有任何可用备份的块 Missing replicas: 0 (0.0 %) 丢失块的总数 Number of data-nodes: 10 datanode的数量 Number of racks: 1 FSCK ended at Thu Oct 23 11:17:32 CST 2014 in 26 milliseconds The filesystem under path '/' is HEALTHY