Java INodeDirectory.setSnapshotQuota方法代码示例

import org.apache.hadoop.hdfs.server.namenode.INodeDirectory; //导入方法依赖的package包/类
/**
 * Set the given directory as a snapshottable directory.
 * If the path is already a snapshottable directory, update the quota.
 */
public void setSnapshottable(final String path, boolean checkNestedSnapshottable)
    throws IOException {
  final INodesInPath iip = fsdir.getINodesInPath4Write(path);
  final INodeDirectory d = INodeDirectory.valueOf(iip.getLastINode(), path);
  if (checkNestedSnapshottable) {
    checkNestedSnapshottable(d, path);
  }

  if (d.isSnapshottable()) {
    //The directory is already a snapshottable directory.
    d.setSnapshotQuota(DirectorySnapshottableFeature.SNAPSHOT_LIMIT);
  } else {
    d.addSnapshottableFeature();
  }
  addSnapshottable(d);
}
 

import org.apache.hadoop.hdfs.server.namenode.INodeDirectory; //导入方法依赖的package包/类
/**
 * Set the given snapshottable directory to non-snapshottable.
 * 
 * @throws SnapshotException if there are snapshots in the directory.
 */
public void resetSnapshottable(final String path) throws IOException {
  final INodesInPath iip = fsdir.getINodesInPath4Write(path);
  final INodeDirectory d = INodeDirectory.valueOf(iip.getLastINode(), path);
  DirectorySnapshottableFeature sf = d.getDirectorySnapshottableFeature();
  if (sf == null) {
    // the directory is already non-snapshottable
    return;
  }
  if (sf.getNumSnapshots() > 0) {
    throw new SnapshotException("The directory " + path + " has snapshot(s). "
        + "Please redo the operation after removing all the snapshots.");
  }

  if (d == fsdir.getRoot()) {
    d.setSnapshotQuota(0);
  } else {
    d.removeSnapshottableFeature();
  }
  removeSnapshottable(d);
}
 

import org.apache.hadoop.hdfs.server.namenode.INodeDirectory; //导入方法依赖的package包/类
/**
 * Load snapshots and snapshotQuota for a Snapshottable directory.
 *
 * @param snapshottableParent
 *          The snapshottable directory for loading.
 * @param numSnapshots
 *          The number of snapshots that the directory has.
 * @param loader
 *          The loader
 */
public static void loadSnapshotList(INodeDirectory snapshottableParent,
    int numSnapshots, DataInput in, FSImageFormat.Loader loader)
    throws IOException {
  DirectorySnapshottableFeature sf = snapshottableParent
      .getDirectorySnapshottableFeature();
  Preconditions.checkArgument(sf != null);
  for (int i = 0; i < numSnapshots; i++) {
    // read snapshots
    final Snapshot s = loader.getSnapshot(in);
    s.getRoot().setParent(snapshottableParent);
    sf.addSnapshot(s);
  }
  int snapshotQuota = in.readInt();
  snapshottableParent.setSnapshotQuota(snapshotQuota);
}
 

import org.apache.hadoop.hdfs.server.namenode.INodeDirectory; //导入方法依赖的package包/类
/**
 * Load the snapshots section from fsimage. Also add snapshottable feature
 * to snapshottable directories.
 */
public void loadSnapshotSection(InputStream in) throws IOException {
  SnapshotManager sm = fsn.getSnapshotManager();
  SnapshotSection section = SnapshotSection.parseDelimitedFrom(in);
  int snum = section.getNumSnapshots();
  sm.setNumSnapshots(snum);
  sm.setSnapshotCounter(section.getSnapshotCounter());
  for (long sdirId : section.getSnapshottableDirList()) {
    INodeDirectory dir = fsDir.getInode(sdirId).asDirectory();
    if (!dir.isSnapshottable()) {
      dir.addSnapshottableFeature();
    } else {
      // dir is root, and admin set root to snapshottable before
      dir.setSnapshotQuota(DirectorySnapshottableFeature.SNAPSHOT_LIMIT);
    }
    sm.addSnapshottable(dir);
  }
  loadSnapshots(in, snum);
}