/*
* 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.cassandra.tools;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Map;
import java.util.Set;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.config.Schema;
import org.apache.cassandra.db.ColumnFamilyStore;
import org.apache.cassandra.db.Keyspace;
import org.apache.cassandra.io.sstable.Component;
import org.apache.cassandra.io.sstable.Descriptor;
import org.apache.cassandra.io.sstable.metadata.MetadataType;
import org.apache.cassandra.io.sstable.metadata.StatsMetadata;
/**
* Reset level to 0 on a given set of sstables
*/
public class SSTableLevelResetter
{
/**
* @param args a list of sstables whose metadata we are changing
*/
public static void main(String[] args) throws IOException
{
PrintStream out = System.out;
if (args.length == 0)
{
out.println("This command should be run with Cassandra stopped!");
out.println("Usage: sstablelevelreset <keyspace> <columnfamily>");
System.exit(1);
}
if (!args[0].equals("--really-reset") || args.length != 3)
{
out.println("This command should be run with Cassandra stopped, otherwise you will get very strange behavior");
out.println("Verify that Cassandra is not running and then execute the command like this:");
out.println("Usage: sstablelevelreset --really-reset <keyspace> <columnfamily>");
System.exit(1);
}
// TODO several daemon threads will run from here.
// So we have to explicitly call System.exit.
try
{
// load keyspace descriptions.
DatabaseDescriptor.loadSchemas();
String keyspaceName = args[1];
String columnfamily = args[2];
// validate columnfamily
if (Schema.instance.getCFMetaData(keyspaceName, columnfamily) == null)
{
System.err.println("ColumnFamily not found: " + keyspaceName + "/" + columnfamily);
System.exit(1);
}
Keyspace keyspace = Keyspace.openWithoutSSTables(keyspaceName);
ColumnFamilyStore cfs = keyspace.getColumnFamilyStore(columnfamily);
boolean foundSSTable = false;
for (Map.Entry<Descriptor, Set<Component>> sstable : cfs.directories.sstableLister().list().entrySet())
{
if (sstable.getValue().contains(Component.STATS))
{
foundSSTable = true;
Descriptor descriptor = sstable.getKey();
StatsMetadata metadata = (StatsMetadata) descriptor.getMetadataSerializer().deserialize(descriptor, MetadataType.STATS);
if (metadata.sstableLevel > 0)
{
out.println("Changing level from " + metadata.sstableLevel + " to 0 on " + descriptor.filenameFor(Component.DATA));
descriptor.getMetadataSerializer().mutateLevel(descriptor, 0);
}
else
{
out.println("Skipped " + descriptor.filenameFor(Component.DATA) + " since it is already on level 0");
}
}
}
if (!foundSSTable)
{
out.println("Found no sstables, did you give the correct keyspace/columnfamily?");
}
}
catch (Throwable e)
{
e.printStackTrace();
System.exit(1);
}
System.exit(0);
}
}