コード例 #1
0
  /**
   * Create a new {@link Reference} as copy of the source one.
   *
   * <p>
   *
   * <blockquote>
   *
   * <pre>
   * The source table looks like:
   *    1234/abc      (original file)
   *    5678/abc.1234 (reference file)
   *
   * After the clone operation looks like:
   *   wxyz/table=1234-abc
   *   stuv/table=1234-abc.wxyz
   *
   * NOTE that the region name in the clone changes (md5 of regioninfo)
   * and the reference should reflect that change.
   * </pre>
   *
   * </blockquote>
   *
   * @param familyDir destination directory for the store file
   * @param regionInfo destination region info for the table
   * @param hfileName reference file name
   */
  private void restoreReferenceFile(
      final Path familyDir, final HRegionInfo regionInfo, final String hfileName)
      throws IOException {
    // Extract the referred information (hfile name and parent region)
    String tableName = snapshotDesc.getTable();
    Path refPath =
        StoreFile.getReferredToFile(
            new Path(
                new Path(new Path(tableName, regionInfo.getEncodedName()), familyDir.getName()),
                hfileName));
    String snapshotRegionName = refPath.getParent().getParent().getName();
    String fileName = refPath.getName();

    // The new reference should have the cloned region name as parent, if it is a clone.
    String clonedRegionName = Bytes.toString(regionsMap.get(Bytes.toBytes(snapshotRegionName)));
    if (clonedRegionName == null) clonedRegionName = snapshotRegionName;

    // The output file should be a reference link table=snapshotRegion-fileName.clonedRegionName
    String refLink = fileName;
    if (!HFileLink.isHFileLink(fileName)) {
      refLink = HFileLink.createHFileLinkName(tableName, snapshotRegionName, fileName);
    }
    Path outPath = new Path(familyDir, refLink + '.' + clonedRegionName);

    // Create the new reference
    Path linkPath =
        new Path(
            familyDir,
            HFileLink.createHFileLinkName(tableName, regionInfo.getEncodedName(), hfileName));
    InputStream in = new HFileLink(conf, linkPath).open(fs);
    OutputStream out = fs.create(outPath);
    IOUtils.copyBytes(in, out, conf);
  }
コード例 #2
0
 /**
  * Create a new {@link HFileLink} to reference the store file.
  *
  * <p>The store file in the snapshot can be a simple hfile, an HFileLink or a reference.
  *
  * <ul>
  *   <li>hfile: abc -> table=region-abc
  *   <li>reference: abc.1234 -> table=region-abc.1234
  *   <li>hfilelink: table=region-hfile -> table=region-hfile
  * </ul>
  *
  * @param familyDir destination directory for the store file
  * @param regionInfo destination region info for the table
  * @param hfileName store file name (can be a Reference, HFileLink or simple HFile)
  */
 private void restoreStoreFile(
     final Path familyDir, final HRegionInfo regionInfo, final String hfileName)
     throws IOException {
   if (HFileLink.isHFileLink(hfileName)) {
     HFileLink.createFromHFileLink(conf, fs, familyDir, hfileName);
   } else if (StoreFile.isReference(hfileName)) {
     restoreReferenceFile(familyDir, regionInfo, hfileName);
   } else {
     HFileLink.create(conf, fs, familyDir, regionInfo, hfileName);
   }
 }