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HBASE-4411 When copying tables/CFs, allow CF names to be changed 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1171880 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack 2011-09-17 00:38:21 +00:00
parent d70a6ec716
commit 6a7e3c3b8b
3 changed files with 105 additions and 4 deletions
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2
CHANGES.txt
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@ -502,6 +502,8 @@ Release 0.91.0 - Unreleased
HBASE-4381 Refactor split decisions into a split policy class. (todd)
HBASE-4373 HBaseAdmin.assign() does not use force flag (Ramkrishna)
HBASE-4425 Provide access to RpcServer instance from RegionServerServices
HBASE-4411 When copying tables/CFs, allow CF names to be changed
(David Revell)
TASKS
HBASE-3559 Move report of split to master OFF the heartbeat channel

23
src/main/java/org/apache/hadoop/hbase/mapreduce/CopyTable.java
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@ -27,6 +27,8 @@ import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.mapreduce.Job;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
* Tool used to copy a table to another one which can be on a different setup.
@ -67,9 +69,22 @@ public class CopyTable {
}
if(families != null) {
String[] fams = families.split(",");
Map<String,String> cfRenameMap = new HashMap<String,String>();
for(String fam : fams) {
scan.addFamily(Bytes.toBytes(fam));
String sourceCf;
if(fam.contains(":")) {
// fam looks like "sourceCfName:destCfName"
String[] srcAndDest = fam.split(":", 2);
sourceCf = srcAndDest[0];
String destCf = srcAndDest[1];
cfRenameMap.put(sourceCf, destCf);
} else {
// fam is just "sourceCf"
sourceCf = fam;
}
scan.addFamily(Bytes.toBytes(sourceCf));
}
Import.configureCfRenaming(job.getConfiguration(), cfRenameMap);
}
TableMapReduceUtil.initTableMapperJob(tableName, scan,
Import.Importer.class, null, null, job);
@ -101,7 +116,9 @@ public class CopyTable {
System.err.println(" new.name new table's name");
System.err.println(" peer.adr Address of the peer cluster given in the format");
System.err.println(" hbase.zookeeer.quorum:hbase.zookeeper.client.port:zookeeper.znode.parent");
System.err.println(" families comma-seperated list of families to copy");
System.err.println(" families comma-separated list of families to copy");
System.err.println(" To copy from cf1 to cf2, give sourceCfName:destCfName. ");
System.err.println(" To keep the same name, just give \"cfName\"");
System.err.println();
System.err.println("Args:");
System.err.println(" tablename Name of the table to copy");
@ -111,7 +128,7 @@ public class CopyTable {
System.err.println(" $ bin/hbase " +
"org.apache.hadoop.hbase.mapreduce.CopyTable --rs.class=org.apache.hadoop.hbase.ipc.ReplicationRegionInterface " +
"--rs.impl=org.apache.hadoop.hbase.regionserver.replication.ReplicationRegionServer --starttime=1265875194289 --endtime=1265878794289 " +
"--peer.adr=server1,server2,server3:2181:/hbase TestTable ");
"--peer.adr=server1,server2,server3:2181:/hbase --families=myOldCf:myNewCf,cf2,cf3 TestTable ");
}
private static boolean doCommandLine(final String[] args) {

84
src/main/java/org/apache/hadoop/hbase/mapreduce/Import.java
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@ -20,6 +20,8 @@
package org.apache.hadoop.hbase.mapreduce;
import java.io.IOException;
import java.util.Map;
import java.util.TreeMap;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
@ -28,6 +30,7 @@ import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat;
@ -38,12 +41,15 @@ import org.apache.hadoop.util.GenericOptionsParser;
*/
public class Import {
final static String NAME = "import";
public static final String CF_RENAME_PROP = "HBASE_IMPORTER_RENAME_CFS";
/**
* Write table content out to files in hdfs.
*/
static class Importer
extends TableMapper<ImmutableBytesWritable, Put> {
private Map<byte[], byte[]> cfRenameMap;
/**
* @param row The current table row key.
* @param value The columns.
@ -63,15 +69,91 @@ public class Import {
}
}
private static Put resultToPut(ImmutableBytesWritable key, Result result)
private Put resultToPut(ImmutableBytesWritable key, Result result)
throws IOException {
Put put = new Put(key.get());
for (KeyValue kv : result.raw()) {
if(cfRenameMap != null) {
// If there's a rename mapping for this CF, create a new KeyValue
byte[] newCfName = cfRenameMap.get(kv.getFamily());
if(newCfName != null) {
kv = new KeyValue(kv.getBuffer(), // row buffer
kv.getRowOffset(), // row offset
kv.getRowLength(), // row length
newCfName, // CF buffer
0, // CF offset
newCfName.length, // CF length
kv.getBuffer(), // qualifier buffer
kv.getQualifierOffset(), // qualifier offset
kv.getQualifierLength(), // qualifier length
kv.getTimestamp(), // timestamp
KeyValue.Type.codeToType(kv.getType()), // KV Type
kv.getBuffer(), // value buffer
kv.getValueOffset(), // value offset
kv.getValueLength()); // value length
}
}
put.add(kv);
}
return put;
}
@Override
public void setup(Context context) {
// Make a map from sourceCfName to destCfName by parsing a config key
cfRenameMap = null;
String allMappingsPropVal = context.getConfiguration().get(CF_RENAME_PROP);
if(allMappingsPropVal != null) {
// The conf value format should be sourceCf1:destCf1,sourceCf2:destCf2,...
String[] allMappings = allMappingsPropVal.split(",");
for (String mapping: allMappings) {
if(cfRenameMap == null) {
cfRenameMap = new TreeMap<byte[],byte[]>(Bytes.BYTES_COMPARATOR);
}
String [] srcAndDest = mapping.split(":");
if(srcAndDest.length != 2) {
continue;
}
cfRenameMap.put(srcAndDest[0].getBytes(), srcAndDest[1].getBytes());
}
}
}
}
/**
* <p>Sets a configuration property with key {@link #CF_RENAME_PROP} in conf that tells
* the mapper how to rename column families.
*
* <p>Alternately, instead of calling this function, you could set the configuration key
* {@link #CF_RENAME_PROP} yourself. The value should look like
* <pre>srcCf1:destCf1,srcCf2:destCf2,....</pre>. This would have the same effect on
* the mapper behavior.
*
* @param conf the Configuration in which the {@link #CF_RENAME_PROP} key will be
* set
* @param renameMap a mapping from source CF names to destination CF names
*/
static public void configureCfRenaming(Configuration conf,
Map<String, String> renameMap) {
StringBuilder sb = new StringBuilder();
for(Map.Entry<String,String> entry: renameMap.entrySet()) {
String sourceCf = entry.getKey();
String destCf = entry.getValue();
if(sourceCf.contains(":") || sourceCf.contains(",") ||
destCf.contains(":") || destCf.contains(",")) {
throw new IllegalArgumentException("Illegal character in CF names: "
+ sourceCf + ", " + destCf);
}
if(sb.length() != 0) {
sb.append(",");
}
sb.append(sourceCf + ":" + destCf);
}
conf.set(CF_RENAME_PROP, sb.toString());
}
/**
* Sets up the actual job.