/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.client;
import static org.junit.Assert.assertEquals;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.LargeTests;
import org.apache.hadoop.hbase.master.MasterFileSystem;
import org.apache.hadoop.hbase.master.snapshot.SnapshotManager;
import org.apache.hadoop.hbase.snapshot.SnapshotDoesNotExistException;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.MD5Hash;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;
/**
* Test clone snapshots from the client
*/
@Category(LargeTests.class)
public class TestCloneSnapshotFromClient {
final Log LOG = LogFactory.getLog(getClass());
private final static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
private final byte[] FAMILY = Bytes.toBytes("cf");
private byte[] emptySnapshot;
private byte[] snapshotName0;
private byte[] snapshotName1;
private byte[] snapshotName2;
private int snapshot0Rows;
private int snapshot1Rows;
private byte[] tableName;
private HBaseAdmin admin;
@BeforeClass
public static void setUpBeforeClass() throws Exception {
TEST_UTIL.getConfiguration().setBoolean(SnapshotManager.HBASE_SNAPSHOT_ENABLED, true);
TEST_UTIL.getConfiguration().setBoolean("hbase.online.schema.update.enable", true);
TEST_UTIL.getConfiguration().setInt("hbase.hstore.compactionThreshold", 10);
TEST_UTIL.getConfiguration().setInt("hbase.regionserver.msginterval", 100);
TEST_UTIL.getConfiguration().setInt("hbase.client.pause", 250);
TEST_UTIL.getConfiguration().setInt("hbase.client.retries.number", 6);
TEST_UTIL.getConfiguration().setBoolean(
"hbase.master.enabletable.roundrobin", true);
TEST_UTIL.startMiniCluster(3);
}
@AfterClass
public static void tearDownAfterClass() throws Exception {
TEST_UTIL.shutdownMiniCluster();
}
/**
* Initialize the tests with a table filled with some data
* and two snapshots (snapshotName0, snapshotName1) of different states.
* The tableName, snapshotNames and the number of rows in the snapshot are initialized.
*/
@Before
public void setup() throws Exception {
this.admin = TEST_UTIL.getHBaseAdmin();
long tid = System.currentTimeMillis();
tableName = Bytes.toBytes("testtb-" + tid);
emptySnapshot = Bytes.toBytes("emptySnaptb-" + tid);
snapshotName0 = Bytes.toBytes("snaptb0-" + tid);
snapshotName1 = Bytes.toBytes("snaptb1-" + tid);
snapshotName2 = Bytes.toBytes("snaptb2-" + tid);
// create Table and disable it
createTable(tableName, FAMILY);
admin.disableTable(tableName);
// take an empty snapshot
admin.snapshot(emptySnapshot, tableName);
HTable table = new HTable(TEST_UTIL.getConfiguration(), tableName);
try {
// enable table and insert data
admin.enableTable(tableName);
loadData(table, 500, FAMILY);
snapshot0Rows = TEST_UTIL.countRows(table);
admin.disableTable(tableName);
// take a snapshot
admin.snapshot(snapshotName0, tableName);
// enable table and insert more data
admin.enableTable(tableName);
loadData(table, 500, FAMILY);
snapshot1Rows = TEST_UTIL.countRows(table);
admin.disableTable(tableName);
// take a snapshot of the updated table
admin.snapshot(snapshotName1, tableName);
// re-enable table
admin.enableTable(tableName);
} finally {
table.close();
}
}
@After
public void tearDown() throws Exception {
if (admin.tableExists(tableName)) {
TEST_UTIL.deleteTable(tableName);
}
admin.deleteSnapshot(snapshotName0);
admin.deleteSnapshot(snapshotName1);
// Ensure the archiver to be empty
MasterFileSystem mfs = TEST_UTIL.getMiniHBaseCluster().getMaster().getMasterFileSystem();
mfs.getFileSystem().delete(
new Path(mfs.getRootDir(), HConstants.HFILE_ARCHIVE_DIRECTORY), true);
}
@Test(expected=SnapshotDoesNotExistException.class)
public void testCloneNonExistentSnapshot() throws IOException, InterruptedException {
String snapshotName = "random-snapshot-" + System.currentTimeMillis();
String tableName = "random-table-" + System.currentTimeMillis();
admin.cloneSnapshot(snapshotName, tableName);
}
@Test
public void testCloneSnapshot() throws IOException, InterruptedException {
byte[] clonedTableName = Bytes.toBytes("clonedtb-" + System.currentTimeMillis());
testCloneSnapshot(clonedTableName, snapshotName0, snapshot0Rows);
testCloneSnapshot(clonedTableName, snapshotName1, snapshot1Rows);
testCloneSnapshot(clonedTableName, emptySnapshot, 0);
}
private void testCloneSnapshot(final byte[] tableName, final byte[] snapshotName,
int snapshotRows) throws IOException, InterruptedException {
// create a new table from snapshot
admin.cloneSnapshot(snapshotName, tableName);
verifyRowCount(tableName, snapshotRows);
admin.disableTable(tableName);
admin.deleteTable(tableName);
}
/**
* Verify that tables created from the snapshot are still alive after source table deletion.
*/
@Test
public void testCloneLinksAfterDelete() throws IOException, InterruptedException {
// Clone a table from the first snapshot
byte[] clonedTableName = Bytes.toBytes("clonedtb1-" + System.currentTimeMillis());
admin.cloneSnapshot(snapshotName0, clonedTableName);
verifyRowCount(clonedTableName, snapshot0Rows);
// Take a snapshot of this cloned table.
admin.disableTable(clonedTableName);
admin.snapshot(snapshotName2, clonedTableName);
// Clone the snapshot of the cloned table
byte[] clonedTableName2 = Bytes.toBytes("clonedtb2-" + System.currentTimeMillis());
admin.cloneSnapshot(snapshotName2, clonedTableName2);
verifyRowCount(clonedTableName2, snapshot0Rows);
admin.disableTable(clonedTableName2);
// Remove the original table
admin.disableTable(tableName);
admin.deleteTable(tableName);
waitCleanerRun();
// Verify the first cloned table
admin.enableTable(clonedTableName);
verifyRowCount(clonedTableName, snapshot0Rows);
// Verify the second cloned table
admin.enableTable(clonedTableName2);
verifyRowCount(clonedTableName2, snapshot0Rows);
admin.disableTable(clonedTableName2);
// Delete the first cloned table
admin.disableTable(clonedTableName);
admin.deleteTable(clonedTableName);
waitCleanerRun();
// Verify the second cloned table
admin.enableTable(clonedTableName2);
verifyRowCount(clonedTableName2, snapshot0Rows);
// Clone a new table from cloned
byte[] clonedTableName3 = Bytes.toBytes("clonedtb3-" + System.currentTimeMillis());
admin.cloneSnapshot(snapshotName2, clonedTableName3);
verifyRowCount(clonedTableName3, snapshot0Rows);
// Delete the cloned tables
admin.disableTable(clonedTableName2);
admin.deleteTable(clonedTableName2);
admin.disableTable(clonedTableName3);
admin.deleteTable(clonedTableName3);
admin.deleteSnapshot(snapshotName2);
}
// ==========================================================================
// Helpers
// ==========================================================================
private void createTable(final byte[] tableName, final byte[]... families) throws IOException {
HTableDescriptor htd = new HTableDescriptor(tableName);
for (byte[] family: families) {
HColumnDescriptor hcd = new HColumnDescriptor(family);
htd.addFamily(hcd);
}
byte[][] splitKeys = new byte[16][];
byte[] hex = Bytes.toBytes("0123456789abcdef");
for (int i = 0; i < 16; ++i) {
splitKeys[i] = new byte[] { hex[i] };
}
admin.createTable(htd, splitKeys);
}
public void loadData(final HTable table, int rows, byte[]... families) throws IOException {
byte[] qualifier = Bytes.toBytes("q");
table.setAutoFlush(false);
while (rows-- > 0) {
byte[] value = Bytes.add(Bytes.toBytes(System.currentTimeMillis()), Bytes.toBytes(rows));
byte[] key = Bytes.toBytes(MD5Hash.getMD5AsHex(value));
Put put = new Put(key);
put.setWriteToWAL(false);
for (byte[] family: families) {
put.add(family, qualifier, value);
}
table.put(put);
}
table.flushCommits();
}
private void waitCleanerRun() throws InterruptedException {
TEST_UTIL.getMiniHBaseCluster().getMaster().getHFileCleaner().choreForTesting();
}
private void verifyRowCount(final byte[] tableName, long expectedRows) throws IOException {
HTable table = new HTable(TEST_UTIL.getConfiguration(), tableName);
assertEquals(expectedRows, TEST_UTIL.countRows(table));
table.close();
}
}