hadoop dfsadmin -setSpaceQuota 设置目录配额的问题

通过该命令可以来限定某个hdfs目录的大小：

 

hadoop dfsadmin -setSpaceQuota 3000 /group/d_sdo_data/user/liuxiaowen

 

但设定之后，put一个2000多字节的文件时候报错：

 

12/05/14 15:41:24 WARN hdfs.DFSClient: DataStreamer Exception: org.apache.hadoop.hdfs.protocol.DSQuotaExceededException: org.apache.hadoop.hdfs.protocol.DSQuotaExceededException: The DiskSpace quota of /group/d_sdo_data/user/liuxiaowen is exceeded: quota=3000 diskspace consumed=384.0m
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:95)
        at org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:57)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3190)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3055)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$1900(DFSClient.java:2305)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2500)
Caused by: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.protocol.DSQuotaExceededException: The DiskSpace quota of /group/d_sdo_data/user/liuxiaowen is exceeded: quota=3000 diskspace consumed=384.0m
        at org.apache.hadoop.hdfs.server.namenode.INodeDirectoryWithQuota.verifyQuota(INodeDirectoryWithQuota.java:149)
        at org.apache.hadoop.hdfs.server.namenode.FSDirectory.verifyQuota(FSDirectory.java:1041)
        at org.apache.hadoop.hdfs.server.namenode.FSDirectory.updateCount(FSDirectory.java:859)
        at org.apache.hadoop.hdfs.server.namenode.FSDirectory.addBlock(FSDirectory.java:277)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.allocateBlock(FSNamesystem.java:1698)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1543)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:665)
        at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:557)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1434)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1430)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1157)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1428)

        at org.apache.hadoop.ipc.Client.call(Client.java:1104)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:226)
        at $Proxy5.addBlock(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
        at $Proxy5.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3185)
        ... 3 more

 

后来发现原因：

 

 这里统计空间的时候会将备份数也考虑在里面，因为集群设置了备份数为3，所以hadoop dfsadmin -setSpaceQuota也要讲备份数考虑进去，即 hadoop dfsadmin -setSpaceQuota 9000 /group/d_sdo_data/user/liuxiaowen

 

另外，这个动作会覆盖上一次的设置；

清除命令： hadoop dfsadmin -clrSpaceQuota /group/d_sdo_data/user/liuxiaowen

查看目录限额： hadoop fs -count -q /group/d_sdo_data/user/liuxiaowen

none             inf            9000            8088            6            1                304 hdfs://nn.dc.sh-wgq.sdo.com/group/d_sdo_data/user/liuxiaowen

 

依次表示为：文件数限额  可用文件数  空间限额 可用空间 目录数  文件数  总大小 文件/目录名