本文整理匯總了Java中org.apache.hadoop.hdfs.DistributedFileSystem.metaSave方法的典型用法代碼示例。如果您正苦於以下問題：Java DistributedFileSystem.metaSave方法的具體用法？Java DistributedFileSystem.metaSave怎麽用？Java DistributedFileSystem.metaSave使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類org.apache.hadoop.hdfs.DistributedFileSystem的用法示例。
在下文中一共展示了DistributedFileSystem.metaSave方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Java代碼示例。
示例1: metaSave
import org.apache.hadoop.hdfs.DistributedFileSystem; //導入方法依賴的package包/類
/**
* Dumps DFS data structures into specified file.
* Usage: hdfs dfsadmin -metasave filename
* @param argv List of of command line parameters.
* @param idx The index of the command that is being processed.
* @exception IOException if an error occurred while accessing
* the file or path.
*/
public int metaSave(String[] argv, int idx) throws IOException {
String pathname = argv[idx];
DistributedFileSystem dfs = getDFS();
Configuration dfsConf = dfs.getConf();
URI dfsUri = dfs.getUri();
boolean isHaEnabled = HAUtil.isLogicalUri(dfsConf, dfsUri);
if (isHaEnabled) {
String nsId = dfsUri.getHost();
List<ProxyAndInfo<ClientProtocol>> proxies =
HAUtil.getProxiesForAllNameNodesInNameservice(dfsConf,
nsId, ClientProtocol.class);
for (ProxyAndInfo<ClientProtocol> proxy : proxies) {
proxy.getProxy().metaSave(pathname);
System.out.println("Created metasave file " + pathname + " in the log "
+ "directory of namenode " + proxy.getAddress());
}
} else {
dfs.metaSave(pathname);
System.out.println("Created metasave file " + pathname + " in the log " +
"directory of namenode " + dfs.getUri());
}
return 0;
}