mirror of https://github.com/apache/cassandra
add sstablemetadata utility
patch by jbellis; reviewed by brandonwilliams for CASSANDRA-4211
This commit is contained in:
Jonathan Ellis
parent
46e422a941
commit
606e666f84
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.cassandra.tools;
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import java.io.IOException;
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import java.io.PrintStream;
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import org.apache.cassandra.config.ConfigurationException;
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import org.apache.cassandra.io.sstable.Descriptor;
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import org.apache.cassandra.io.sstable.SSTableMetadata;
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/**
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* Shows the contents of sstable metadata
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*/
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public class SSTableMetadataViewer
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{
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/**
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* @param args a list of sstables whose metadata we're interested in
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*/
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public static void main(String[] args) throws IOException, ConfigurationException
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{
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PrintStream out = System.out;
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if (args.length == 0)
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{
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out.println("Usage: sstablemetadata <sstable filenames>");
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System.exit(1);
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}
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for (String fname : args)
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{
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Descriptor descriptor = Descriptor.fromFilename(fname);
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SSTableMetadata metadata = SSTableMetadata.serializer.deserialize(descriptor);
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out.printf("SSTable: %s\n", descriptor);
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out.printf("Partitioner: %s\n", metadata.partitioner);
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out.printf("Maximum timestamp: %s\n", metadata.maxTimestamp);
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out.printf("Compression ratio: %s\n", metadata.compressionRatio);
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out.printf("Estimated droppable tombstones: %s\n", metadata.getEstimatedDroppableTombstoneRatio((int) (System.currentTimeMillis() / 1000)));
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out.println(metadata.replayPosition);
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printHistograms(metadata, out);
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}
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}
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private static void printHistograms(SSTableMetadata metadata, PrintStream out)
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{
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long[] offsets = metadata.estimatedRowSize.getBucketOffsets();
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long[] ersh = metadata.estimatedRowSize.getBuckets(false);
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long[] ecch = metadata.estimatedColumnCount.getBuckets(false);
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out.println(String.format("%-10s%18s%18s",
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"Count", "Row Size", "Column Count"));
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for (int i = 0; i < offsets.length; i++)
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{
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out.println(String.format("%-10d%18s%18s",
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offsets[i],
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(i < ersh.length ? ersh[i] : ""),
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(i < ecch.length ? ecch[i] : "")));
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}
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}
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}
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@ -0,0 +1,46 @@
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#!/bin/sh
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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if [ "x$CLASSPATH" = "x" ]; then
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# execute from the build dir.
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if [ -d `dirname $0`/../../build/classes ]; then
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for directory in `dirname $0`/../../build/classes/*; do
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CLASSPATH=$CLASSPATH:$directory
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done
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else
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if [ -f `dirname $0`/../lib/stress.jar ]; then
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CLASSPATH=`dirname $0`/../lib/stress.jar
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fi
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fi
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for jar in `dirname $0`/../../lib/*.jar; do
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CLASSPATH=$CLASSPATH:$jar
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done
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fi
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# Use JAVA_HOME if set, otherwise look for java in PATH
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if [ -x $JAVA_HOME/bin/java ]; then
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JAVA=$JAVA_HOME/bin/java
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else
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JAVA=`which java`
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fi
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$JAVA -cp $CLASSPATH \
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-Dlog4j.configuration=log4j-tools.properties \
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org.apache.cassandra.tools.SSTableMetadataViewer "$@"
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@ -0,0 +1,30 @@
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@REM Licensed to the Apache Software Foundation (ASF) under one or more
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@REM contributor license agreements. See the NOTICE file distributed with
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@REM this work for additional information regarding copyright ownership.
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@REM The ASF licenses this file to You under the Apache License, Version 2.0
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@REM (the "License"); you may not use this file except in compliance with
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@REM the License. You may obtain a copy of the License at
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@REM
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@REM http://www.apache.org/licenses/LICENSE-2.0
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@REM
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@REM Unless required by applicable law or agreed to in writing, software
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@REM distributed under the License is distributed on an "AS IS" BASIS,
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@REM WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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@REM See the License for the specific language governing permissions and
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@REM limitations under the License.
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@echo off
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if NOT DEFINED CASSANDRA_HOME set CASSANDRA_HOME=%CD%\..\..
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set CLASSPATH=""
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for %%i in ("%CASSANDRA_HOME%\build\*.jar") do call :append "%%i"
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for %%i in ("%CASSANDRA_HOME%\lib\*.jar") do call :append "%%i"
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goto start
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:append
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set CLASSPATH=%CLASSPATH%;%1
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goto :eof
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:start
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"%JAVA_HOME%\bin\java" -cp %CLASSPATH% org.apache.cassandra.tools.SSTableMetadataViewer %*
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