/** Remove specified regions from the file-system, using the archiver. */
private void removeHdfsRegions(final List<HRegionInfo> regions) throws IOException {
if (regions != null && regions.size() > 0) {
for (HRegionInfo hri : regions) {
HFileArchiver.archiveRegion(conf, fs, hri);
}
}
}
/**
* Remove the region from the table directory, archiving the region's hfiles.
*
* @param conf the {@link Configuration} to use
* @param fs {@link FileSystem} from which to remove the region
* @param tableDir {@link Path} to where the table is being stored
* @param regionInfo {@link HRegionInfo} for region to be deleted
* @throws IOException if the request cannot be completed
*/
public static void deleteRegionFromFileSystem(
final Configuration conf,
final FileSystem fs,
final Path tableDir,
final HRegionInfo regionInfo)
throws IOException {
HRegionFileSystem regionFs = new HRegionFileSystem(conf, fs, tableDir, regionInfo);
Path regionDir = regionFs.getRegionDir();
if (!fs.exists(regionDir)) {
LOG.warn("Trying to delete a region that do not exists on disk: " + regionDir);
return;
}
if (LOG.isDebugEnabled()) {
LOG.debug("DELETING region " + regionDir);
}
// Archive region
Path rootDir = FSUtils.getRootDir(conf);
HFileArchiver.archiveRegion(fs, rootDir, tableDir, regionDir);
// Delete empty region dir
if (!fs.delete(regionDir, true)) {
LOG.warn("Failed delete of " + regionDir);
}
}
public void deleteFamilyFromFS(HRegionInfo region, byte[] familyName)
throws IOException {
// archive family store files
Path tableDir = new Path(rootdir, region.getTableNameAsString());
HFileArchiver.archiveFamily(fs, conf, region, tableDir, familyName);
// delete the family folder
Path familyDir = new Path(tableDir,
new Path(region.getEncodedName(), Bytes.toString(familyName)));
if (fs.delete(familyDir, true) == false) {
throw new IOException("Could not delete family "
+ Bytes.toString(familyName) + " from FileSystem for region "
+ region.getRegionNameAsString() + "(" + region.getEncodedName()
+ ")");
}
}
/**
* Remove the region family from disk, archiving the store files.
*
* @param familyName Column Family Name
* @throws IOException if an error occours during the archiving
*/
public void deleteFamily(final String familyName) throws IOException {
// archive family store files
HFileArchiver.archiveFamily(fs, conf, regionInfo, tableDir, Bytes.toBytes(familyName));
// delete the family folder
Path familyDir = getStoreDir(familyName);
if (fs.exists(familyDir) && !deleteDir(familyDir))
throw new IOException(
"Could not delete family "
+ familyName
+ " from FileSystem for region "
+ regionInfo.getRegionNameAsString()
+ "("
+ regionInfo.getEncodedName()
+ ")");
}
/**
* Make sure the hbase temp directory exists and is empty.
* NOTE that this method is only executed once just after the master becomes the active one.
*/
private void checkTempDir(final Path tmpdir, final Configuration c, final FileSystem fs)
throws IOException {
// If the temp directory exists, clear the content (left over, from the previous run)
if (fs.exists(tmpdir)) {
// Archive table in temp, maybe left over from failed deletion,
// if not the cleaner will take care of them.
for (Path tabledir: FSUtils.getTableDirs(fs, tmpdir)) {
for (Path regiondir: FSUtils.getRegionDirs(fs, tabledir)) {
HFileArchiver.archiveRegion(fs, this.rootdir, tabledir, regiondir);
}
}
if (!fs.delete(tmpdir, true)) {
throw new IOException("Unable to clean the temp directory: " + tmpdir);
}
}
// Create the temp directory
if (!fs.mkdirs(tmpdir)) {
throw new IOException("HBase temp directory '" + tmpdir + "' creation failure.");
}
}
/** Removes the table from hbase:meta and archives the HDFS files. */
protected void removeTableData(final List<HRegionInfo> regions)
throws IOException, CoordinatedStateException {
try {
// 1. Remove regions from META
LOG.debug("Deleting regions from META");
MetaTableAccessor.deleteRegions(this.server.getConnection(), regions);
// -----------------------------------------------------------------------
// NOTE: At this point we still have data on disk, but nothing in hbase:meta
// if the rename below fails, hbck will report an inconsistency.
// -----------------------------------------------------------------------
// 2. Move the table in /hbase/.tmp
MasterFileSystem mfs = this.masterServices.getMasterFileSystem();
Path tempTableDir = mfs.moveTableToTemp(tableName);
// 3. Archive regions from FS (temp directory)
FileSystem fs = mfs.getFileSystem();
for (HRegionInfo hri : regions) {
LOG.debug("Archiving region " + hri.getRegionNameAsString() + " from FS");
HFileArchiver.archiveRegion(
fs,
mfs.getRootDir(),
tempTableDir,
HRegion.getRegionDir(tempTableDir, hri.getEncodedName()));
}
// 4. Delete table directory from FS (temp directory)
if (!fs.delete(tempTableDir, true)) {
LOG.error("Couldn't delete " + tempTableDir);
}
LOG.debug("Table '" + tableName + "' archived!");
} finally {
cleanupTableState();
}
}
public void deleteRegion(HRegionInfo region) throws IOException {
HFileArchiver.archiveRegion(conf, fs, region);
}
/**
* Restore region by removing files not in the snapshot and adding the missing ones from the
* snapshot.
*/
private void restoreRegion(HRegionInfo regionInfo) throws IOException {
Path snapshotRegionDir = new Path(snapshotDir, regionInfo.getEncodedName());
Map<String, List<String>> snapshotFiles =
SnapshotReferenceUtil.getRegionHFileReferences(fs, snapshotRegionDir);
Path regionDir = new Path(tableDir, regionInfo.getEncodedName());
String tableName = tableDesc.getNameAsString();
// Restore families present in the table
for (Path familyDir : FSUtils.getFamilyDirs(fs, regionDir)) {
byte[] family = Bytes.toBytes(familyDir.getName());
Set<String> familyFiles = getTableRegionFamilyFiles(familyDir);
List<String> snapshotFamilyFiles = snapshotFiles.remove(familyDir.getName());
if (snapshotFamilyFiles != null) {
List<String> hfilesToAdd = new LinkedList<String>();
for (String hfileName : snapshotFamilyFiles) {
if (familyFiles.contains(hfileName)) {
// HFile already present
familyFiles.remove(hfileName);
} else {
// HFile missing
hfilesToAdd.add(hfileName);
}
}
// Restore Missing files
for (String hfileName : hfilesToAdd) {
LOG.trace(
"Adding HFileLink "
+ hfileName
+ " to region="
+ regionInfo.getEncodedName()
+ " table="
+ tableName);
restoreStoreFile(familyDir, regionInfo, hfileName);
}
// Remove hfiles not present in the snapshot
for (String hfileName : familyFiles) {
Path hfile = new Path(familyDir, hfileName);
LOG.trace(
"Removing hfile="
+ hfile
+ " from region="
+ regionInfo.getEncodedName()
+ " table="
+ tableName);
HFileArchiver.archiveStoreFile(fs, regionInfo, conf, tableDir, family, hfile);
}
} else {
// Family doesn't exists in the snapshot
LOG.trace(
"Removing family="
+ Bytes.toString(family)
+ " from region="
+ regionInfo.getEncodedName()
+ " table="
+ tableName);
HFileArchiver.archiveFamily(fs, conf, regionInfo, tableDir, family);
fs.delete(familyDir, true);
}
}
// Add families not present in the table
for (Map.Entry<String, List<String>> familyEntry : snapshotFiles.entrySet()) {
Path familyDir = new Path(regionDir, familyEntry.getKey());
if (!fs.mkdirs(familyDir)) {
throw new IOException("Unable to create familyDir=" + familyDir);
}
for (String hfileName : familyEntry.getValue()) {
LOG.trace("Adding HFileLink " + hfileName + " to table=" + tableName);
restoreStoreFile(familyDir, regionInfo, hfileName);
}
}
}
/**
* Closes and archives the specified store files from the specified family.
*
* @param familyName Family that contains the store files
* @param storeFiles set of store files to remove
* @throws IOException if the archiving fails
*/
public void removeStoreFiles(final String familyName, final Collection<StoreFile> storeFiles)
throws IOException {
HFileArchiver.archiveStoreFiles(
this.conf, this.fs, this.regionInfo, this.tableDir, Bytes.toBytes(familyName), storeFiles);
}
/**
* Archives the specified store file from the specified family.
*
* @param familyName Family that contains the store files
* @param filePath {@link Path} to the store file to remove
* @throws IOException if the archiving fails
*/
public void removeStoreFile(final String familyName, final Path filePath) throws IOException {
HFileArchiver.archiveStoreFile(
this.conf, this.fs, this.regionInfo, this.tableDir, Bytes.toBytes(familyName), filePath);
}
