Merge branch 'master' of github.com:metamx/druid

client/src/main/java/com/metamx/druid/QueryableNode.java

@@ -43,6 +43,7 @@ import com.metamx.druid.coordination.CuratorDataSegmentAnnouncer;
 import com.metamx.druid.coordination.DataSegmentAnnouncer;
 import com.metamx.druid.coordination.DruidServerMetadata;
 import com.metamx.druid.curator.announcement.Announcer;
+import com.metamx.druid.http.NoopRequestLogger;
 import com.metamx.druid.http.RequestLogger;
 import com.metamx.druid.initialization.CuratorConfig;
 import com.metamx.druid.initialization.Initialization;
@@ -374,12 +375,14 @@ public abstract class QueryableNode<T extends QueryableNode> extends Registering
             getEmitter()
           ));
         }
-        else {
+        else if ("file".equalsIgnoreCase(loggingType)) {
           setRequestLogger(Initialization.makeFileRequestLogger(
             getJsonMapper(),
             getScheduledExecutorFactory(),
             getProps()
           ));
+        } else {
+          setRequestLogger(new NoopRequestLogger());
         }
       }
       catch (IOException e) {

client/src/main/java/com/metamx/druid/http/NoopRequestLogger.java

@@ -0,0 +1,31 @@
+/*
+ * Druid - a distributed column store.
+ * Copyright (C) 2012  Metamarkets Group Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+package com.metamx.druid.http;
+
+/**
+ */
+public class NoopRequestLogger implements RequestLogger
+{
+  @Override
+  public void log(RequestLogLine requestLogLine) throws Exception
+  {
+    // do nothing
+  }
+}

client/src/main/java/com/metamx/druid/query/metadata/SegmentMetadataQueryQueryToolChest.java

@@ -46,13 +46,16 @@ import org.joda.time.Minutes;
 
 import javax.annotation.Nullable;
 import java.nio.ByteBuffer;
+import java.util.Comparator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
 public class SegmentMetadataQueryQueryToolChest extends QueryToolChest<SegmentAnalysis, SegmentMetadataQuery>
 {
-  private static final TypeReference<SegmentAnalysis> TYPE_REFERENCE = new TypeReference<SegmentAnalysis>(){};
+  private static final TypeReference<SegmentAnalysis> TYPE_REFERENCE = new TypeReference<SegmentAnalysis>()
+  {
+  };
   private static final byte[] SEGMENT_METADATA_CACHE_PREFIX = new byte[]{0x4};
 
   @Override
@@ -228,6 +231,6 @@ public class SegmentMetadataQueryQueryToolChest extends QueryToolChest<SegmentAn
       {
         return left.getId().compareTo(right.getId());
       }
-    };
+    }.nullsFirst();
   }
 }

common/src/main/java/com/metamx/druid/aggregation/CountAggregatorFactory.java

@@ -21,6 +21,7 @@ package com.metamx.druid.aggregation;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
 import com.google.common.primitives.Longs;
 import com.metamx.druid.processing.ColumnSelectorFactory;
@@ -40,6 +41,8 @@ public class CountAggregatorFactory implements AggregatorFactory
       @JsonProperty("name") String name
   )
   {
+    Preconditions.checkNotNull(name, "Must have a valid, non null aggregator name");
+
     this.name = name;
   }
 

common/src/main/java/com/metamx/druid/aggregation/DoubleSumAggregator.java

@@ -19,6 +19,7 @@
 
 package com.metamx.druid.aggregation;
 
+import com.google.common.collect.Ordering;
 import com.google.common.primitives.Doubles;
 import com.metamx.druid.processing.FloatMetricSelector;
 
@@ -28,14 +29,14 @@ import java.util.Comparator;
  */
 public class DoubleSumAggregator implements Aggregator
 {
-  static final Comparator COMPARATOR = new Comparator()
+  static final Comparator COMPARATOR = new Ordering()
   {
     @Override
     public int compare(Object o, Object o1)
     {
       return Doubles.compare(((Number) o).doubleValue(), ((Number) o1).doubleValue());
     }
-  };
+  }.nullsFirst();
 
   static double combineValues(Object lhs, Object rhs)
   {

common/src/main/java/com/metamx/druid/aggregation/DoubleSumAggregatorFactory.java

@@ -21,6 +21,7 @@ package com.metamx.druid.aggregation;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.common.base.Preconditions;
 import com.google.common.primitives.Doubles;
 import com.metamx.druid.processing.ColumnSelectorFactory;
 
@@ -44,6 +45,9 @@ public class DoubleSumAggregatorFactory implements AggregatorFactory
       @JsonProperty("fieldName") final String fieldName
   )
   {
+    Preconditions.checkNotNull(name, "Must have a valid, nonl null aggregator name");
+    Preconditions.checkNotNull(fieldName, "Must have a valid, non null fieldName");
+
     this.name = name;
     this.fieldName = fieldName;
   }

common/src/main/java/com/metamx/druid/aggregation/HistogramAggregatorFactory.java

@@ -22,6 +22,8 @@ package com.metamx.druid.aggregation;
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.google.common.base.Charsets;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Lists;
 import com.google.common.primitives.Floats;
 import com.google.common.primitives.Longs;
 import com.metamx.druid.processing.ColumnSelectorFactory;
@@ -49,12 +51,18 @@ public class HistogramAggregatorFactory implements AggregatorFactory
       @JsonProperty("breaks") final List<Float> breaksList
   )
   {
+    Preconditions.checkNotNull(name, "Must have a valid, nonl null aggregator name");
+    Preconditions.checkNotNull(fieldName, "Must have a valid, non null fieldName");
+
     this.name = name;
     this.fieldName = fieldName;
-    this.breaksList = breaksList;
+    this.breaksList = (breaksList == null) ? Lists.<Float>newArrayList() :breaksList;
-    this.breaks = new float[breaksList.size()];
+    this.breaks = new float[this.breaksList.size()];
-    for(int i = 0; i < breaksList.size(); ++i) this.breaks[i] = breaksList.get(i);
+    for (int i = 0; i < this.breaksList.size(); ++i) {
+      this.breaks[i] = this.breaksList.get(i);
+    }
   }
+
   @Override
   public Aggregator factorize(ColumnSelectorFactory metricFactory)
   {
@@ -95,14 +103,12 @@ public class HistogramAggregatorFactory implements AggregatorFactory
   @Override
   public Object deserialize(Object object)
   {
-    if (object instanceof byte []) {
+    if (object instanceof byte[]) {
-      return Histogram.fromBytes((byte []) object);
+      return Histogram.fromBytes((byte[]) object);
-    }
+    } else if (object instanceof ByteBuffer) {
-    else if (object instanceof ByteBuffer) {
       return Histogram.fromBytes((ByteBuffer) object);
-    }
+    } else if (object instanceof String) {
-    else if(object instanceof String) {
+      byte[] bytes = Base64.decodeBase64(((String) object).getBytes(Charsets.UTF_8));
-      byte[] bytes = Base64.decodeBase64(((String)object).getBytes(Charsets.UTF_8));
       return Histogram.fromBytes(bytes);
     }
     return object;
@@ -111,7 +117,7 @@ public class HistogramAggregatorFactory implements AggregatorFactory
   @Override
   public Object finalizeComputation(Object object)
   {
-    return ((Histogram)object).asVisual();
+    return ((Histogram) object).asVisual();
   }
 
   @Override
@@ -149,7 +155,7 @@ public class HistogramAggregatorFactory implements AggregatorFactory
   @Override
   public String getTypeName()
   {
-     throw new UnsupportedOperationException("HistogramAggregatorFactory does not support getTypeName()");
+    throw new UnsupportedOperationException("HistogramAggregatorFactory does not support getTypeName()");
   }
 
   @Override

common/src/main/java/com/metamx/druid/aggregation/JavaScriptAggregatorFactory.java

@@ -23,6 +23,7 @@ import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.google.common.base.Charsets;
 import com.google.common.base.Joiner;
+import com.google.common.base.Preconditions;
 import com.google.common.collect.Lists;
 import com.google.common.primitives.Doubles;
 import com.metamx.druid.processing.ColumnSelectorFactory;
@@ -51,7 +52,6 @@ public class JavaScriptAggregatorFactory implements AggregatorFactory
   private final String fnCombine;
 
 
-
   private final JavaScriptAggregator.ScriptAggregator compiledScript;
 
   @JsonCreator
@@ -63,6 +63,12 @@ public class JavaScriptAggregatorFactory implements AggregatorFactory
       @JsonProperty("fnCombine") final String fnCombine
   )
   {
+    Preconditions.checkNotNull(name, "Must have a valid, non null aggregator name");
+    Preconditions.checkNotNull(fieldNames, "Must have a valid, non null fieldNames");
+    Preconditions.checkNotNull(fnAggregate, "Must have a valid, non null fnAggregate");
+    Preconditions.checkNotNull(fnReset, "Must have a valid, non null fnReset");
+    Preconditions.checkNotNull(fnCombine, "Must have a valid, non null fnCombine");
+
     this.name = name;
     this.fieldNames = fieldNames;
 
@@ -83,7 +89,8 @@ public class JavaScriptAggregatorFactory implements AggregatorFactory
             new com.google.common.base.Function<String, ObjectColumnSelector>()
             {
               @Override
-              public ObjectColumnSelector apply(@Nullable String s) {
+              public ObjectColumnSelector apply(@Nullable String s)
+              {
                 return columnFactory.makeObjectColumnSelector(s);
               }
             }
@@ -101,7 +108,8 @@ public class JavaScriptAggregatorFactory implements AggregatorFactory
             new com.google.common.base.Function<String, ObjectColumnSelector>()
             {
               @Override
-              public ObjectColumnSelector apply(@Nullable String s) {
+              public ObjectColumnSelector apply(@Nullable String s)
+              {
                 return columnSelectorFactory.makeObjectColumnSelector(s);
               }
             }
@@ -148,7 +156,8 @@ public class JavaScriptAggregatorFactory implements AggregatorFactory
   }
 
   @JsonProperty
-  public List<String> getFieldNames() {
+  public List<String> getFieldNames()
+  {
     return fieldNames;
   }
 
@@ -182,7 +191,7 @@ public class JavaScriptAggregatorFactory implements AggregatorFactory
     try {
       MessageDigest md = MessageDigest.getInstance("SHA-1");
       byte[] fieldNameBytes = Joiner.on(",").join(fieldNames).getBytes(Charsets.UTF_8);
-      byte[] sha1 = md.digest((fnAggregate+fnReset+fnCombine).getBytes(Charsets.UTF_8));
+      byte[] sha1 = md.digest((fnAggregate + fnReset + fnCombine).getBytes(Charsets.UTF_8));
 
       return ByteBuffer.allocate(1 + fieldNameBytes.length + sha1.length)
                        .put(CACHE_TYPE_ID)
@@ -225,7 +234,11 @@ public class JavaScriptAggregatorFactory implements AggregatorFactory
            '}';
   }
 
-  public static JavaScriptAggregator.ScriptAggregator compileScript(final String aggregate, final String reset, final String combine)
+  public static JavaScriptAggregator.ScriptAggregator compileScript(
+      final String aggregate,
+      final String reset,
+      final String combine
+  )
   {
     final ContextFactory contextFactory = ContextFactory.getGlobal();
     Context context = contextFactory.enterContext();
@@ -234,8 +247,8 @@ public class JavaScriptAggregatorFactory implements AggregatorFactory
     final ScriptableObject scope = context.initStandardObjects();
 
     final Function fnAggregate = context.compileFunction(scope, aggregate, "aggregate", 1, null);
-    final Function fnReset     = context.compileFunction(scope, reset,     "reset",     1, null);
+    final Function fnReset = context.compileFunction(scope, reset, "reset", 1, null);
-    final Function fnCombine   = context.compileFunction(scope, combine,   "combine",   1, null);
+    final Function fnCombine = context.compileFunction(scope, combine, "combine", 1, null);
     Context.exit();
 
     return new JavaScriptAggregator.ScriptAggregator()
@@ -244,7 +257,9 @@ public class JavaScriptAggregatorFactory implements AggregatorFactory
       public double aggregate(final double current, final ObjectColumnSelector[] selectorList)
       {
         Context cx = Context.getCurrentContext();
-        if(cx == null) cx = contextFactory.enterContext();
+        if (cx == null) {
+          cx = contextFactory.enterContext();
+        }
 
         final int size = selectorList.length;
         final Object[] args = new Object[size + 1];
@@ -292,8 +307,9 @@ public class JavaScriptAggregatorFactory implements AggregatorFactory
       }
 
       @Override
-      public void close() {
+      public void close()
-        if(Context.getCurrentContext() != null) {
+      {
+        if (Context.getCurrentContext() != null) {
           Context.exit();
         }
       }

common/src/main/java/com/metamx/druid/aggregation/LongSumAggregatorFactory.java

@@ -21,6 +21,7 @@ package com.metamx.druid.aggregation;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.common.base.Preconditions;
 import com.google.common.primitives.Longs;
 import com.metamx.druid.processing.ColumnSelectorFactory;
 
@@ -44,6 +45,9 @@ public class LongSumAggregatorFactory implements AggregatorFactory
       @JsonProperty("fieldName") final String fieldName
   )
   {
+    Preconditions.checkNotNull(name, "Must have a valid, nonl null aggregator name");
+    Preconditions.checkNotNull(fieldName, "Must have a valid, non null fieldName");
+
     this.name = name;
     this.fieldName = fieldName;
   }

common/src/main/java/com/metamx/druid/aggregation/MaxAggregatorFactory.java

@@ -21,6 +21,7 @@ package com.metamx.druid.aggregation;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.common.base.Preconditions;
 import com.google.common.primitives.Doubles;
 import com.metamx.druid.processing.ColumnSelectorFactory;
 
@@ -44,6 +45,9 @@ public class MaxAggregatorFactory implements AggregatorFactory
       @JsonProperty("fieldName") final String fieldName
   )
   {
+    Preconditions.checkNotNull(name, "Must have a valid, non null aggregator name");
+    Preconditions.checkNotNull(fieldName, "Must have a valid, non null fieldName");
+
     this.name = name;
     this.fieldName = fieldName;
   }

common/src/main/java/com/metamx/druid/aggregation/MinAggregatorFactory.java

@@ -21,6 +21,7 @@ package com.metamx.druid.aggregation;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.common.base.Preconditions;
 import com.google.common.primitives.Doubles;
 import com.metamx.druid.processing.ColumnSelectorFactory;
 
@@ -44,6 +45,9 @@ public class MinAggregatorFactory implements AggregatorFactory
       @JsonProperty("fieldName") final String fieldName
   )
   {
+    Preconditions.checkNotNull(name, "Must have a valid, non null aggregator name");
+    Preconditions.checkNotNull(fieldName, "Must have a valid, non null fieldName");
+
     this.name = name;
     this.fieldName = fieldName;
   }

realtime/src/main/java/com/metamx/druid/realtime/plumber/RealtimePlumberSchool.java

@@ -55,6 +55,9 @@ import com.metamx.druid.query.QueryRunner;
 import com.metamx.druid.query.QueryRunnerFactory;
 import com.metamx.druid.query.QueryRunnerFactoryConglomerate;
 import com.metamx.druid.query.QueryToolChest;
+import com.metamx.druid.query.segment.SegmentDescriptor;
+import com.metamx.druid.query.segment.SpecificSegmentQueryRunner;
+import com.metamx.druid.query.segment.SpecificSegmentSpec;
 import com.metamx.druid.realtime.FireDepartmentMetrics;
 import com.metamx.druid.realtime.FireHydrant;
 import com.metamx.druid.realtime.Schema;
@@ -253,23 +256,32 @@ public class RealtimePlumberSchool implements PlumberSchool
                         new Function<Sink, QueryRunner<T>>()
                         {
                           @Override
-                          public QueryRunner<T> apply(@Nullable Sink input)
+                          public QueryRunner<T> apply(Sink input)
                           {
-                            return new MetricsEmittingQueryRunner<T>(
+                            return new SpecificSegmentQueryRunner<T>(
-                                emitter,
+                                new MetricsEmittingQueryRunner<T>(
-                                builderFn,
+                                    emitter,
-                                factory.mergeRunners(
+                                    builderFn,
-                                    EXEC,
+                                    factory.mergeRunners(
-                                    Iterables.transform(
+                                        EXEC,
-                                        input,
+                                        Iterables.transform(
-                                        new Function<FireHydrant, QueryRunner<T>>()
+                                            input,
-                                        {
+                                            new Function<FireHydrant, QueryRunner<T>>()
-                                          @Override
+                                            {
-                                          public QueryRunner<T> apply(@Nullable FireHydrant input)
+                                              @Override
-                                          {
+                                              public QueryRunner<T> apply(FireHydrant input)
-                                            return factory.createRunner(input.getSegment());
+                                              {
-                                          }
+                                                return factory.createRunner(input.getSegment());
-                                        }
+                                              }
+                                            }
+                                        )
+                                    )
+                                ),
+                                new SpecificSegmentSpec(
+                                    new SegmentDescriptor(
+                                        input.getInterval(),
+                                        input.getSegment().getVersion(),
+                                        input.getSegment().getShardSpec().getPartitionNum()
                                     )
                                 )
                             );
@@ -380,12 +392,16 @@ public class RealtimePlumberSchool implements PlumberSchool
 
           //final File[] sinkFiles = sinkDir.listFiles();
           // To avoid reading and listing of "merged" dir
-          final File[] sinkFiles = sinkDir.listFiles(new FilenameFilter() {  		
+          final File[] sinkFiles = sinkDir.listFiles(
-        			@Override
+              new FilenameFilter()
-        			public boolean accept(File dir, String fileName) {				
+              {
-        				return !(Ints.tryParse(fileName) == null);
+                @Override
-        			}
+                public boolean accept(File dir, String fileName)
-        		});
+                {
+                  return !(Ints.tryParse(fileName) == null);
+                }
+              }
+          );
           Arrays.sort(
               sinkFiles,
               new Comparator<File>()
@@ -408,15 +424,14 @@ public class RealtimePlumberSchool implements PlumberSchool
             List<FireHydrant> hydrants = Lists.newArrayList();
             for (File segmentDir : sinkFiles) {
               log.info("Loading previously persisted segment at [%s]", segmentDir);
-              
+
               // Although this has been tackled at start of this method.
               // Just a doubly-check added to skip "merged" dir. from being added to hydrants 
               // If 100% sure that this is not needed, this check can be removed.
-              if(Ints.tryParse(segmentDir.getName()) == null)
+              if (Ints.tryParse(segmentDir.getName()) == null) {
-              {
                 continue;
               }
-              
+
               hydrants.add(
                   new FireHydrant(
                       new QueryableIndexSegment(null, IndexIO.loadIndex(segmentDir)),

server/src/main/java/com/metamx/druid/master/DruidMasterBalancer.java

@@ -112,15 +112,16 @@ public class DruidMasterBalancer implements DruidMasterHelper
         continue;
       }
 
-      int iter = 0;
+      for (int iter = 0; iter < maxSegmentsToMove; iter++) {
-      while (iter < maxSegmentsToMove) {
-        iter++;
         final BalancerSegmentHolder segmentToMove = analyzer.pickSegmentToMove(serverHolderList);
-        final ServerHolder holder = analyzer.findNewSegmentHomeBalance(segmentToMove.getSegment(), serverHolderList);
+
-        if (holder == null) {
+        if (params.getAvailableSegments().contains(segmentToMove.getSegment())) {
-          continue;
+          final ServerHolder holder = analyzer.findNewSegmentHomeBalance(segmentToMove.getSegment(), serverHolderList);
+
+          if (holder != null) {
+            moveSegment(segmentToMove, holder.getServer(), params);
+          }
         }
-        moveSegment(segmentToMove, holder.getServer(), params);
       }
 
       final double initialTotalCost = analyzer.calculateInitialTotalCost(serverHolderList);

server/src/main/java/com/metamx/druid/master/rules/LoadRule.java

@@ -62,16 +62,18 @@ public abstract class LoadRule implements Rule
     final DateTime referenceTimestamp = params.getBalancerReferenceTimestamp();
     final BalancerCostAnalyzer analyzer = params.getBalancerCostAnalyzer(referenceTimestamp);
 
-    stats.accumulate(
+    if (params.getAvailableSegments().contains(segment)) {
-        assign(
+      stats.accumulate(
-            params.getReplicationManager(),
+          assign(
-            expectedReplicants,
+              params.getReplicationManager(),
-            totalReplicants,
+              expectedReplicants,
-            analyzer,
+              totalReplicants,
-            serverHolderList,
+              analyzer,
-            segment
+              serverHolderList,
-        )
+              segment
-    );
+          )
+      );
+    }
 
     stats.accumulate(drop(expectedReplicants, clusterReplicants, segment, params));
 

server/src/main/java/com/metamx/druid/master/rules/Rule.java

@@ -35,7 +35,9 @@ import org.joda.time.DateTime;
     @JsonSubTypes.Type(name = "loadByPeriod", value = PeriodLoadRule.class),
     @JsonSubTypes.Type(name = "loadByInterval", value = IntervalLoadRule.class),
     @JsonSubTypes.Type(name = "dropByPeriod", value = PeriodDropRule.class),
-    @JsonSubTypes.Type(name = "dropByInterval", value = IntervalDropRule.class)
+    @JsonSubTypes.Type(name = "dropByInterval", value = IntervalDropRule.class),
+    @JsonSubTypes.Type(name = "loadBySize", value = SizeLoadRule.class),
+    @JsonSubTypes.Type(name = "dropBySize", value = SizeDropRule.class)
 })
 
 public interface Rule

server/src/main/java/com/metamx/druid/master/rules/SizeDropRule.java

@@ -0,0 +1,71 @@
+/*
+ * Druid - a distributed column store.
+ * Copyright (C) 2012  Metamarkets Group Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+package com.metamx.druid.master.rules;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.common.collect.Range;
+import com.metamx.druid.client.DataSegment;
+import org.joda.time.DateTime;
+
+/**
+ */
+public class SizeDropRule extends DropRule
+{
+  private final long low;
+  private final long high;
+  private final Range<Long> range;
+
+  @JsonCreator
+  public SizeDropRule(
+      @JsonProperty("low") long low,
+      @JsonProperty("high") long high
+  )
+  {
+    this.low = low;
+    this.high = high;
+    this.range = Range.closedOpen(low, high);
+  }
+
+  @Override
+  @JsonProperty
+  public String getType()
+  {
+    return "dropBySize";
+  }
+
+  @JsonProperty
+  public long getLow()
+  {
+    return low;
+  }
+
+  @JsonProperty
+  public long getHigh()
+  {
+    return high;
+  }
+
+  @Override
+  public boolean appliesTo(DataSegment segment, DateTime referenceTimestamp)
+  {
+    return range.contains(segment.getSize());
+  }
+}

server/src/main/java/com/metamx/druid/master/rules/SizeLoadRule.java

@@ -0,0 +1,96 @@
+/*
+ * Druid - a distributed column store.
+ * Copyright (C) 2012  Metamarkets Group Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+package com.metamx.druid.master.rules;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.common.collect.Range;
+import com.metamx.druid.client.DataSegment;
+import org.joda.time.DateTime;
+
+/**
+ */
+public class SizeLoadRule extends LoadRule
+{
+  private final long low;
+  private final long high;
+  private final Integer replicants;
+  private final String tier;
+  private final Range<Long> range;
+
+  @JsonCreator
+  public SizeLoadRule(
+      @JsonProperty("low") long low,
+      @JsonProperty("high") long high,
+      @JsonProperty("replicants") Integer replicants,
+      @JsonProperty("tier") String tier
+  )
+  {
+    this.low = low;
+    this.high = high;
+    this.replicants = replicants;
+    this.tier = tier;
+    this.range = Range.closedOpen(low, high);
+  }
+
+  @Override
+  @JsonProperty
+  public int getReplicants()
+  {
+    return replicants;
+  }
+
+  @Override
+  public int getReplicants(String tier)
+  {
+    return (this.tier.equalsIgnoreCase(tier)) ? replicants : 0;
+  }
+
+  @Override
+  @JsonProperty
+  public String getTier()
+  {
+    return tier;
+  }
+
+  @Override
+  public String getType()
+  {
+    return "loadBySize";
+  }
+
+  @JsonProperty
+  public long getLow()
+  {
+    return low;
+  }
+
+  @JsonProperty
+  public long getHigh()
+  {
+    return high;
+  }
+
+  @Override
+  public boolean appliesTo(DataSegment segment, DateTime referenceTimestamp)
+  {
+    return range.contains(segment.getSize());
+  }
+}