Example usage for org.apache.hadoop.hdfs.server.namenode FSNamesystem getNamespaceEditsDirs

Introduction

In this page you can find the example usage for org.apache.hadoop.hdfs.server.namenode FSNamesystem getNamespaceEditsDirs.

Prototype

public static List<URI> getNamespaceEditsDirs(Configuration conf) throws IOException 

Source Link

Document

Return an ordered list of edits directories to write to.

Usage

From source file:com.mellanox.r4h.MiniDFSCluster.java

License:Apache License

/**
 * Get the directories where the namenode stores its edits.
 *//*from   w ww  .j av a 2  s  .c  om*/
public Collection<URI> getNameEditsDirs(int nnIndex) throws IOException {
    return FSNamesystem.getNamespaceEditsDirs(nameNodes[nnIndex].conf);
}

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From source file:common.NameNode.java

License:Apache License

/**
 * Verify that configured directories exist, then
 * Interactively confirm that formatting is desired 
 * for each existing directory and format them.
 * //from  w w  w .  j a v a  2 s . c  o m
 * @param conf
 * @param isConfirmationNeeded
 * @return true if formatting was aborted, false otherwise
 * @throws IOException
 */
private static boolean format(Configuration conf, boolean isConfirmationNeeded) throws IOException {
    Collection<URI> dirsToFormat = FSNamesystem.getNamespaceDirs(conf);
    Collection<URI> editDirsToFormat = FSNamesystem.getNamespaceEditsDirs(conf);
    for (Iterator<URI> it = dirsToFormat.iterator(); it.hasNext();) {
        File curDir = new File(it.next().getPath());
        if (!curDir.exists())
            continue;
        if (isConfirmationNeeded) {
            System.err.print("Re-format filesystem in " + curDir + " ? (Y or N) ");
            if (!(System.in.read() == 'Y')) {
                System.err.println("Format aborted in " + curDir);
                return true;
            }
            while (System.in.read() != '\n')
                ; // discard the enter-key
        }
    }

    FSNamesystem nsys = new FSNamesystem(new FSImage(dirsToFormat, editDirsToFormat), conf);
    nsys.dir.fsImage.format();
    return false;
}

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From source file:common.NameNode.java

License:Apache License

private static boolean finalize(Configuration conf, boolean isConfirmationNeeded) throws IOException {
    Collection<URI> dirsToFormat = FSNamesystem.getNamespaceDirs(conf);
    Collection<URI> editDirsToFormat = FSNamesystem.getNamespaceEditsDirs(conf);
    FSNamesystem nsys = new FSNamesystem(new FSImage(dirsToFormat, editDirsToFormat), conf);
    System.err.print("\"finalize\" will remove the previous state of the files system.\n"
            + "Recent upgrade will become permanent.\n" + "Rollback option will not be available anymore.\n");
    if (isConfirmationNeeded) {
        System.err.print("Finalize filesystem state ? (Y or N) ");
        if (!(System.in.read() == 'Y')) {
            System.err.println("Finalize aborted.");
            return true;
        }//  w  ww.  java  2 s  .  com
        while (System.in.read() != '\n')
            ; // discard the enter-key
    }
    nsys.dir.fsImage.finalizeUpgrade();
    return false;
}

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