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Posted to commits@hbase.apache.org by gi...@apache.org on 2018/08/13 14:49:45 UTC
[12/32] hbase-site git commit: Published site at
a07e755625382d3904c935c21a4f240ede6d2f43.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/75e49c45/devapidocs/src-html/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.PlanComparator.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.PlanComparator.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.PlanComparator.html
index 9267f53..c688159 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.PlanComparator.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.PlanComparator.html
@@ -26,213 +26,239 @@
<span class="sourceLineNo">018</span> */<a name="line.18"></a>
<span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.master.normalizer;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
-<span class="sourceLineNo">021</span>import java.util.ArrayList;<a name="line.21"></a>
-<span class="sourceLineNo">022</span>import java.util.Collections;<a name="line.22"></a>
-<span class="sourceLineNo">023</span>import java.util.Comparator;<a name="line.23"></a>
-<span class="sourceLineNo">024</span>import java.util.List;<a name="line.24"></a>
-<span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.25"></a>
-<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.26"></a>
-<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.RegionMetrics;<a name="line.27"></a>
-<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.ServerName;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.Size;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.TableName;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.client.MasterSwitchType;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.master.MasterRpcServices;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.master.MasterServices;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.master.normalizer.NormalizationPlan.PlanType;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import org.slf4j.Logger;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import org.slf4j.LoggerFactory;<a name="line.38"></a>
-<span class="sourceLineNo">039</span><a name="line.39"></a>
-<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;<a name="line.40"></a>
+<span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a>
+<span class="sourceLineNo">022</span>import java.util.ArrayList;<a name="line.22"></a>
+<span class="sourceLineNo">023</span>import java.util.Collections;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import java.util.Comparator;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import java.util.List;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.RegionMetrics;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.ServerName;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.Size;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.TableName;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.client.MasterSwitchType;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.client.TableDescriptor;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.master.MasterRpcServices;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.master.MasterServices;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.master.normalizer.NormalizationPlan.PlanType;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.slf4j.Logger;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.slf4j.LoggerFactory;<a name="line.40"></a>
<span class="sourceLineNo">041</span><a name="line.41"></a>
-<span class="sourceLineNo">042</span>/**<a name="line.42"></a>
-<span class="sourceLineNo">043</span> * Simple implementation of region normalizer.<a name="line.43"></a>
-<span class="sourceLineNo">044</span> *<a name="line.44"></a>
-<span class="sourceLineNo">045</span> * Logic in use:<a name="line.45"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;<a name="line.42"></a>
+<span class="sourceLineNo">043</span><a name="line.43"></a>
+<span class="sourceLineNo">044</span>/**<a name="line.44"></a>
+<span class="sourceLineNo">045</span> * Simple implementation of region normalizer.<a name="line.45"></a>
<span class="sourceLineNo">046</span> *<a name="line.46"></a>
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-<span class="sourceLineNo">048</span> * <li> Get all regions of a given table<a name="line.48"></a>
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-<span class="sourceLineNo">050</span> * <li> Seek every single region one by one. If a region R0 is bigger than S * 2, it is<a name="line.50"></a>
-<span class="sourceLineNo">051</span> * kindly requested to split. Thereon evaluate the next region R1<a name="line.51"></a>
-<span class="sourceLineNo">052</span> * <li> Otherwise, if R0 + R1 is smaller than S, R0 and R1 are kindly requested to merge.<a name="line.52"></a>
-<span class="sourceLineNo">053</span> * Thereon evaluate the next region R2<a name="line.53"></a>
-<span class="sourceLineNo">054</span> * <li> Otherwise, R1 is evaluated<a name="line.54"></a>
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-<span class="sourceLineNo">058</span> * "empty" regions (less than 1MB, with the previous note) are not merged away. This<a name="line.58"></a>
-<span class="sourceLineNo">059</span> * is by design to prevent normalization from undoing the pre-splitting of a table.<a name="line.59"></a>
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-<span class="sourceLineNo">061</span>@InterfaceAudience.Private<a name="line.61"></a>
-<span class="sourceLineNo">062</span>public class SimpleRegionNormalizer implements RegionNormalizer {<a name="line.62"></a>
-<span class="sourceLineNo">063</span><a name="line.63"></a>
-<span class="sourceLineNo">064</span> private static final Logger LOG = LoggerFactory.getLogger(SimpleRegionNormalizer.class);<a name="line.64"></a>
-<span class="sourceLineNo">065</span> private int minRegionCount;<a name="line.65"></a>
-<span class="sourceLineNo">066</span> private MasterServices masterServices;<a name="line.66"></a>
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-<span class="sourceLineNo">068</span> private static long[] skippedCount = new long[NormalizationPlan.PlanType.values().length];<a name="line.68"></a>
-<span class="sourceLineNo">069</span><a name="line.69"></a>
-<span class="sourceLineNo">070</span> public SimpleRegionNormalizer() {<a name="line.70"></a>
-<span class="sourceLineNo">071</span> minRegionCount = HBaseConfiguration.create().getInt("hbase.normalizer.min.region.count", 3);<a name="line.71"></a>
-<span class="sourceLineNo">072</span> }<a name="line.72"></a>
-<span class="sourceLineNo">073</span> /**<a name="line.73"></a>
-<span class="sourceLineNo">074</span> * Set the master service.<a name="line.74"></a>
-<span class="sourceLineNo">075</span> * @param masterServices inject instance of MasterServices<a name="line.75"></a>
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-<span class="sourceLineNo">077</span> @Override<a name="line.77"></a>
-<span class="sourceLineNo">078</span> public void setMasterServices(MasterServices masterServices) {<a name="line.78"></a>
-<span class="sourceLineNo">079</span> this.masterServices = masterServices;<a name="line.79"></a>
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-<span class="sourceLineNo">082</span> @Override<a name="line.82"></a>
-<span class="sourceLineNo">083</span> public void setMasterRpcServices(MasterRpcServices masterRpcServices) {<a name="line.83"></a>
-<span class="sourceLineNo">084</span> this.masterRpcServices = masterRpcServices;<a name="line.84"></a>
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-<span class="sourceLineNo">088</span> public void planSkipped(RegionInfo hri, PlanType type) {<a name="line.88"></a>
-<span class="sourceLineNo">089</span> skippedCount[type.ordinal()]++;<a name="line.89"></a>
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-<span class="sourceLineNo">092</span> @Override<a name="line.92"></a>
-<span class="sourceLineNo">093</span> public long getSkippedCount(NormalizationPlan.PlanType type) {<a name="line.93"></a>
-<span class="sourceLineNo">094</span> return skippedCount[type.ordinal()];<a name="line.94"></a>
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-<span class="sourceLineNo">096</span><a name="line.96"></a>
-<span class="sourceLineNo">097</span> /**<a name="line.97"></a>
-<span class="sourceLineNo">098</span> * Comparator class that gives higher priority to region Split plan.<a name="line.98"></a>
-<span class="sourceLineNo">099</span> */<a name="line.99"></a>
-<span class="sourceLineNo">100</span> static class PlanComparator implements Comparator<NormalizationPlan> {<a name="line.100"></a>
-<span class="sourceLineNo">101</span> @Override<a name="line.101"></a>
-<span class="sourceLineNo">102</span> public int compare(NormalizationPlan plan1, NormalizationPlan plan2) {<a name="line.102"></a>
-<span class="sourceLineNo">103</span> boolean plan1IsSplit = plan1 instanceof SplitNormalizationPlan;<a name="line.103"></a>
-<span class="sourceLineNo">104</span> boolean plan2IsSplit = plan2 instanceof SplitNormalizationPlan;<a name="line.104"></a>
-<span class="sourceLineNo">105</span> if (plan1IsSplit && plan2IsSplit) {<a name="line.105"></a>
-<span class="sourceLineNo">106</span> return 0;<a name="line.106"></a>
-<span class="sourceLineNo">107</span> } else if (plan1IsSplit) {<a name="line.107"></a>
-<span class="sourceLineNo">108</span> return -1;<a name="line.108"></a>
-<span class="sourceLineNo">109</span> } else if (plan2IsSplit) {<a name="line.109"></a>
-<span class="sourceLineNo">110</span> return 1;<a name="line.110"></a>
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-<span class="sourceLineNo">115</span> }<a name="line.115"></a>
-<span class="sourceLineNo">116</span><a name="line.116"></a>
-<span class="sourceLineNo">117</span> private Comparator<NormalizationPlan> planComparator = new PlanComparator();<a name="line.117"></a>
+<span class="sourceLineNo">047</span> * Logic in use:<a name="line.47"></a>
+<span class="sourceLineNo">048</span> *<a name="line.48"></a>
+<span class="sourceLineNo">049</span> * <ol><a name="line.49"></a>
+<span class="sourceLineNo">050</span> * <li> Get all regions of a given table<a name="line.50"></a>
+<span class="sourceLineNo">051</span> * <li> Get avg size S of each region (by total size of store files reported in RegionMetrics)<a name="line.51"></a>
+<span class="sourceLineNo">052</span> * <li> Seek every single region one by one. If a region R0 is bigger than S * 2, it is<a name="line.52"></a>
+<span class="sourceLineNo">053</span> * kindly requested to split. Thereon evaluate the next region R1<a name="line.53"></a>
+<span class="sourceLineNo">054</span> * <li> Otherwise, if R0 + R1 is smaller than S, R0 and R1 are kindly requested to merge.<a name="line.54"></a>
+<span class="sourceLineNo">055</span> * Thereon evaluate the next region R2<a name="line.55"></a>
+<span class="sourceLineNo">056</span> * <li> Otherwise, R1 is evaluated<a name="line.56"></a>
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+<span class="sourceLineNo">058</span> * <p><a name="line.58"></a>
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+<span class="sourceLineNo">060</span> * "empty" regions (less than 1MB, with the previous note) are not merged away. This<a name="line.60"></a>
+<span class="sourceLineNo">061</span> * is by design to prevent normalization from undoing the pre-splitting of a table.<a name="line.61"></a>
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+<span class="sourceLineNo">063</span>@InterfaceAudience.Private<a name="line.63"></a>
+<span class="sourceLineNo">064</span>public class SimpleRegionNormalizer implements RegionNormalizer {<a name="line.64"></a>
+<span class="sourceLineNo">065</span><a name="line.65"></a>
+<span class="sourceLineNo">066</span> private static final Logger LOG = LoggerFactory.getLogger(SimpleRegionNormalizer.class);<a name="line.66"></a>
+<span class="sourceLineNo">067</span> private int minRegionCount;<a name="line.67"></a>
+<span class="sourceLineNo">068</span> private MasterServices masterServices;<a name="line.68"></a>
+<span class="sourceLineNo">069</span> private MasterRpcServices masterRpcServices;<a name="line.69"></a>
+<span class="sourceLineNo">070</span> private static long[] skippedCount = new long[NormalizationPlan.PlanType.values().length];<a name="line.70"></a>
+<span class="sourceLineNo">071</span><a name="line.71"></a>
+<span class="sourceLineNo">072</span> public SimpleRegionNormalizer() {<a name="line.72"></a>
+<span class="sourceLineNo">073</span> minRegionCount = HBaseConfiguration.create().getInt("hbase.normalizer.min.region.count", 3);<a name="line.73"></a>
+<span class="sourceLineNo">074</span> }<a name="line.74"></a>
+<span class="sourceLineNo">075</span> /**<a name="line.75"></a>
+<span class="sourceLineNo">076</span> * Set the master service.<a name="line.76"></a>
+<span class="sourceLineNo">077</span> * @param masterServices inject instance of MasterServices<a name="line.77"></a>
+<span class="sourceLineNo">078</span> */<a name="line.78"></a>
+<span class="sourceLineNo">079</span> @Override<a name="line.79"></a>
+<span class="sourceLineNo">080</span> public void setMasterServices(MasterServices masterServices) {<a name="line.80"></a>
+<span class="sourceLineNo">081</span> this.masterServices = masterServices;<a name="line.81"></a>
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+<span class="sourceLineNo">084</span> @Override<a name="line.84"></a>
+<span class="sourceLineNo">085</span> public void setMasterRpcServices(MasterRpcServices masterRpcServices) {<a name="line.85"></a>
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+<span class="sourceLineNo">088</span><a name="line.88"></a>
+<span class="sourceLineNo">089</span> @Override<a name="line.89"></a>
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+<span class="sourceLineNo">093</span><a name="line.93"></a>
+<span class="sourceLineNo">094</span> @Override<a name="line.94"></a>
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+<span class="sourceLineNo">096</span> return skippedCount[type.ordinal()];<a name="line.96"></a>
+<span class="sourceLineNo">097</span> }<a name="line.97"></a>
+<span class="sourceLineNo">098</span><a name="line.98"></a>
+<span class="sourceLineNo">099</span> /**<a name="line.99"></a>
+<span class="sourceLineNo">100</span> * Comparator class that gives higher priority to region Split plan.<a name="line.100"></a>
+<span class="sourceLineNo">101</span> */<a name="line.101"></a>
+<span class="sourceLineNo">102</span> static class PlanComparator implements Comparator<NormalizationPlan> {<a name="line.102"></a>
+<span class="sourceLineNo">103</span> @Override<a name="line.103"></a>
+<span class="sourceLineNo">104</span> public int compare(NormalizationPlan plan1, NormalizationPlan plan2) {<a name="line.104"></a>
+<span class="sourceLineNo">105</span> boolean plan1IsSplit = plan1 instanceof SplitNormalizationPlan;<a name="line.105"></a>
+<span class="sourceLineNo">106</span> boolean plan2IsSplit = plan2 instanceof SplitNormalizationPlan;<a name="line.106"></a>
+<span class="sourceLineNo">107</span> if (plan1IsSplit && plan2IsSplit) {<a name="line.107"></a>
+<span class="sourceLineNo">108</span> return 0;<a name="line.108"></a>
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+<span class="sourceLineNo">110</span> return -1;<a name="line.110"></a>
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+<span class="sourceLineNo">112</span> return 1;<a name="line.112"></a>
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+<span class="sourceLineNo">114</span> return 0;<a name="line.114"></a>
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-<span class="sourceLineNo">128</span> if (table == null || table.isSystemTable()) {<a name="line.128"></a>
-<span class="sourceLineNo">129</span> LOG.debug("Normalization of system table " + table + " isn't allowed");<a name="line.129"></a>
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-<span class="sourceLineNo">144</span><a name="line.144"></a>
-<span class="sourceLineNo">145</span> LOG.debug("Computing normalization plan for table: " + table +<a name="line.145"></a>
-<span class="sourceLineNo">146</span> ", number of regions: " + tableRegions.size());<a name="line.146"></a>
-<span class="sourceLineNo">147</span><a name="line.147"></a>
-<span class="sourceLineNo">148</span> long totalSizeMb = 0;<a name="line.148"></a>
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+<span class="sourceLineNo">120</span><a name="line.120"></a>
+<span class="sourceLineNo">121</span> /**<a name="line.121"></a>
+<span class="sourceLineNo">122</span> * Computes next most "urgent" normalization action on the table.<a name="line.122"></a>
+<span class="sourceLineNo">123</span> * Action may be either a split, or a merge, or no action.<a name="line.123"></a>
+<span class="sourceLineNo">124</span> *<a name="line.124"></a>
+<span class="sourceLineNo">125</span> * @param table table to normalize<a name="line.125"></a>
+<span class="sourceLineNo">126</span> * @return normalization plan to execute<a name="line.126"></a>
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+<span class="sourceLineNo">128</span> @Override<a name="line.128"></a>
+<span class="sourceLineNo">129</span> public List<NormalizationPlan> computePlanForTable(TableName table) throws HBaseIOException {<a name="line.129"></a>
+<span class="sourceLineNo">130</span> if (table == null || table.isSystemTable()) {<a name="line.130"></a>
+<span class="sourceLineNo">131</span> LOG.debug("Normalization of system table " + table + " isn't allowed");<a name="line.131"></a>
+<span class="sourceLineNo">132</span> return null;<a name="line.132"></a>
+<span class="sourceLineNo">133</span> }<a name="line.133"></a>
+<span class="sourceLineNo">134</span><a name="line.134"></a>
+<span class="sourceLineNo">135</span> List<NormalizationPlan> plans = new ArrayList<>();<a name="line.135"></a>
+<span class="sourceLineNo">136</span> List<RegionInfo> tableRegions = masterServices.getAssignmentManager().getRegionStates().<a name="line.136"></a>
+<span class="sourceLineNo">137</span> getRegionsOfTable(table);<a name="line.137"></a>
+<span class="sourceLineNo">138</span><a name="line.138"></a>
+<span class="sourceLineNo">139</span> //TODO: should we make min number of regions a config param?<a name="line.139"></a>
+<span class="sourceLineNo">140</span> if (tableRegions == null || tableRegions.size() < minRegionCount) {<a name="line.140"></a>
+<span class="sourceLineNo">141</span> int nrRegions = tableRegions == null ? 0 : tableRegions.size();<a name="line.141"></a>
+<span class="sourceLineNo">142</span> LOG.debug("Table " + table + " has " + nrRegions + " regions, required min number"<a name="line.142"></a>
+<span class="sourceLineNo">143</span> + " of regions for normalizer to run is " + minRegionCount + ", not running normalizer");<a name="line.143"></a>
+<span class="sourceLineNo">144</span> return null;<a name="line.144"></a>
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+<span class="sourceLineNo">146</span><a name="line.146"></a>
+<span class="sourceLineNo">147</span> LOG.debug("Computing normalization plan for table: " + table +<a name="line.147"></a>
+<span class="sourceLineNo">148</span> ", number of regions: " + tableRegions.size());<a name="line.148"></a>
+<span class="sourceLineNo">149</span><a name="line.149"></a>
+<span class="sourceLineNo">150</span> long totalSizeMb = 0;<a name="line.150"></a>
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+<span class="sourceLineNo">170</span> LOG.debug("Table {}: target region count is {}, target region size is {}", table,<a name="line.170"></a>
+<span class="sourceLineNo">171</span> targetRegionCount, targetRegionSize);<a name="line.171"></a>
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+<span class="sourceLineNo">176</span> table);<a name="line.176"></a>
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+<span class="sourceLineNo">183</span> avgRegionSize = totalSizeMb / (double) targetRegionCount;<a name="line.183"></a>
+<span class="sourceLineNo">184</span> } else {<a name="line.184"></a>
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+<span class="sourceLineNo">187</span><a name="line.187"></a>
+<span class="sourceLineNo">188</span> LOG.debug("Table " + table + ", total aggregated regions size: " + totalSizeMb);<a name="line.188"></a>
+<span class="sourceLineNo">189</span> LOG.debug("Table " + table + ", average region size: " + avgRegionSize);<a name="line.189"></a>
+<span class="sourceLineNo">190</span><a name="line.190"></a>
+<span class="sourceLineNo">191</span> int candidateIdx = 0;<a name="line.191"></a>
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+<span class="sourceLineNo">196</span> } catch (org.apache.hbase.thirdparty.com.google.protobuf.ServiceException e) {<a name="line.196"></a>
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+<span class="sourceLineNo">198</span> }<a name="line.198"></a>
+<span class="sourceLineNo">199</span> try {<a name="line.199"></a>
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+<span class="sourceLineNo">201</span> RequestConverter.buildIsSplitOrMergeEnabledRequest(MasterSwitchType.MERGE)).getEnabled();<a name="line.201"></a>
+<span class="sourceLineNo">202</span> } catch (org.apache.hbase.thirdparty.com.google.protobuf.ServiceException e) {<a name="line.202"></a>
+<span class="sourceLineNo">203</span> LOG.debug("Unable to determine whether split is enabled", e);<a name="line.203"></a>
+<span class="sourceLineNo">204</span> }<a name="line.204"></a>
+<span class="sourceLineNo">205</span> while (candidateIdx < tableRegions.size()) {<a name="line.205"></a>
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+<span class="sourceLineNo">207</span> long regionSize = getRegionSize(hri);<a name="line.207"></a>
+<span class="sourceLineNo">208</span> // if the region is > 2 times larger than average, we split it, split<a name="line.208"></a>
+<span class="sourceLineNo">209</span> // is more high priority normalization action than merge.<a name="line.209"></a>
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+<span class="sourceLineNo">211</span> if (splitEnabled) {<a name="line.211"></a>
+<span class="sourceLineNo">212</span> LOG.info("Table " + table + ", large region " + hri.getRegionNameAsString() + " has size "<a name="line.212"></a>
+<span class="sourceLineNo">213</span> + regionSize + ", more than twice avg size, splitting");<a name="line.213"></a>
+<span class="sourceLineNo">214</span> plans.add(new SplitNormalizationPlan(hri, null));<a name="line.214"></a>
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+<span class="sourceLineNo">216</span> } else {<a name="line.216"></a>
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+<span class="sourceLineNo">218</span> break;<a name="line.218"></a>
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+<span class="sourceLineNo">220</span> if (mergeEnabled) {<a name="line.220"></a>
+<span class="sourceLineNo">221</span> RegionInfo hri2 = tableRegions.get(candidateIdx+1);<a name="line.221"></a>
+<span class="sourceLineNo">222</span> long regionSize2 = getRegionSize(hri2);<a name="line.222"></a>
+<span class="sourceLineNo">223</span> if (regionSize >= 0 && regionSize2 >= 0 && regionSize + regionSize2 < avgRegionSize) {<a name="line.223"></a>
+<span class="sourceLineNo">224</span> LOG.info("Table " + table + ", small region size: " + regionSize<a name="line.224"></a>
+<span class="sourceLineNo">225</span> + " plus its neighbor size: " + regionSize2<a name="line.225"></a>
+<span class="sourceLineNo">226</span> + ", less than the avg size " + avgRegionSize + ", merging them");<a name="line.226"></a>
+<span class="sourceLineNo">227</span> plans.add(new MergeNormalizationPlan(hri, hri2));<a name="line.227"></a>
+<span class="sourceLineNo">228</span> candidateIdx++;<a name="line.228"></a>
+<span class="sourceLineNo">229</span> }<a name="line.229"></a>
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+<span class="sourceLineNo">232</span> candidateIdx++;<a name="line.232"></a>
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+<span class="sourceLineNo">234</span> if (plans.isEmpty()) {<a name="line.234"></a>
+<span class="sourceLineNo">235</span> LOG.debug("No normalization needed, regions look good for table: " + table);<a name="line.235"></a>
+<span class="sourceLineNo">236</span> return null;<a name="line.236"></a>
+<span class="sourceLineNo">237</span> }<a name="line.237"></a>
+<span class="sourceLineNo">238</span> Collections.sort(plans, planComparator);<a name="line.238"></a>
+<span class="sourceLineNo">239</span> return plans;<a name="line.239"></a>
+<span class="sourceLineNo">240</span> }<a name="line.240"></a>
+<span class="sourceLineNo">241</span><a name="line.241"></a>
+<span class="sourceLineNo">242</span> private long getRegionSize(RegionInfo hri) {<a name="line.242"></a>
+<span class="sourceLineNo">243</span> ServerName sn = masterServices.getAssignmentManager().getRegionStates().<a name="line.243"></a>
+<span class="sourceLineNo">244</span> getRegionServerOfRegion(hri);<a name="line.244"></a>
+<span class="sourceLineNo">245</span> RegionMetrics regionLoad = masterServices.getServerManager().getLoad(sn).<a name="line.245"></a>
+<span class="sourceLineNo">246</span> getRegionMetrics().get(hri.getRegionName());<a name="line.246"></a>
+<span class="sourceLineNo">247</span> if (regionLoad == null) {<a name="line.247"></a>
+<span class="sourceLineNo">248</span> LOG.debug(hri.getRegionNameAsString() + " was not found in RegionsLoad");<a name="line.248"></a>
+<span class="sourceLineNo">249</span> return -1;<a name="line.249"></a>
+<span class="sourceLineNo">250</span> }<a name="line.250"></a>
+<span class="sourceLineNo">251</span> return (long) regionLoad.getStoreFileSize().get(Size.Unit.MEGABYTE);<a name="line.251"></a>
+<span class="sourceLineNo">252</span> }<a name="line.252"></a>
+<span class="sourceLineNo">253</span>}<a name="line.253"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/75e49c45/devapidocs/src-html/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.html
index 9267f53..c688159 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/normalizer/SimpleRegionNormalizer.html
@@ -26,213 +26,239 @@
<span class="sourceLineNo">018</span> */<a name="line.18"></a>
<span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.master.normalizer;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
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-<span class="sourceLineNo">022</span>import java.util.Collections;<a name="line.22"></a>
-<span class="sourceLineNo">023</span>import java.util.Comparator;<a name="line.23"></a>
-<span class="sourceLineNo">024</span>import java.util.List;<a name="line.24"></a>
-<span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.25"></a>
-<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.26"></a>
-<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.RegionMetrics;<a name="line.27"></a>
-<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.ServerName;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.Size;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.TableName;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.client.MasterSwitchType;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.master.MasterRpcServices;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.master.MasterServices;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.master.normalizer.NormalizationPlan.PlanType;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import org.slf4j.Logger;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import org.slf4j.LoggerFactory;<a name="line.38"></a>
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-<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;<a name="line.40"></a>
+<span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a>
+<span class="sourceLineNo">022</span>import java.util.ArrayList;<a name="line.22"></a>
+<span class="sourceLineNo">023</span>import java.util.Collections;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import java.util.Comparator;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import java.util.List;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.HBaseIOException;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.RegionMetrics;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.ServerName;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.Size;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.TableName;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.client.MasterSwitchType;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.client.TableDescriptor;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.master.MasterRpcServices;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.master.MasterServices;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.master.normalizer.NormalizationPlan.PlanType;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.slf4j.Logger;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.slf4j.LoggerFactory;<a name="line.40"></a>
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-<span class="sourceLineNo">042</span>/**<a name="line.42"></a>
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-<span class="sourceLineNo">044</span> *<a name="line.44"></a>
-<span class="sourceLineNo">045</span> * Logic in use:<a name="line.45"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.shaded.protobuf.RequestConverter;<a name="line.42"></a>
+<span class="sourceLineNo">043</span><a name="line.43"></a>
+<span class="sourceLineNo">044</span>/**<a name="line.44"></a>
+<span class="sourceLineNo">045</span> * Simple implementation of region normalizer.<a name="line.45"></a>
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-<span class="sourceLineNo">050</span> * <li> Seek every single region one by one. If a region R0 is bigger than S * 2, it is<a name="line.50"></a>
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-<span class="sourceLineNo">058</span> * "empty" regions (less than 1MB, with the previous note) are not merged away. This<a name="line.58"></a>
-<span class="sourceLineNo">059</span> * is by design to prevent normalization from undoing the pre-splitting of a table.<a name="line.59"></a>
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-<span class="sourceLineNo">061</span>@InterfaceAudience.Private<a name="line.61"></a>
-<span class="sourceLineNo">062</span>public class SimpleRegionNormalizer implements RegionNormalizer {<a name="line.62"></a>
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-<span class="sourceLineNo">064</span> private static final Logger LOG = LoggerFactory.getLogger(SimpleRegionNormalizer.class);<a name="line.64"></a>
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-<span class="sourceLineNo">070</span> public SimpleRegionNormalizer() {<a name="line.70"></a>
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-<span class="sourceLineNo">073</span> /**<a name="line.73"></a>
-<span class="sourceLineNo">074</span> * Set the master service.<a name="line.74"></a>
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-<span class="sourceLineNo">092</span> @Override<a name="line.92"></a>
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-<span class="sourceLineNo">094</span> return skippedCount[type.ordinal()];<a name="line.94"></a>
-<span class="sourceLineNo">095</span> }<a name="line.95"></a>
-<span class="sourceLineNo">096</span><a name="line.96"></a>
-<span class="sourceLineNo">097</span> /**<a name="line.97"></a>
-<span class="sourceLineNo">098</span> * Comparator class that gives higher priority to region Split plan.<a name="line.98"></a>
-<span class="sourceLineNo">099</span> */<a name="line.99"></a>
-<span class="sourceLineNo">100</span> static class PlanComparator implements Comparator<NormalizationPlan> {<a name="line.100"></a>
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-<span class="sourceLineNo">103</span> boolean plan1IsSplit = plan1 instanceof SplitNormalizationPlan;<a name="line.103"></a>
-<span class="sourceLineNo">104</span> boolean plan2IsSplit = plan2 instanceof SplitNormalizationPlan;<a name="line.104"></a>
-<span class="sourceLineNo">105</span> if (plan1IsSplit && plan2IsSplit) {<a name="line.105"></a>
-<span class="sourceLineNo">106</span> return 0;<a name="line.106"></a>
-<span class="sourceLineNo">107</span> } else if (plan1IsSplit) {<a name="line.107"></a>
-<span class="sourceLineNo">108</span> return -1;<a name="line.108"></a>
-<span class="sourceLineNo">109</span> } else if (plan2IsSplit) {<a name="line.109"></a>
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-<span class="sourceLineNo">117</span> private Comparator<NormalizationPlan> planComparator = new PlanComparator();<a name="line.117"></a>
+<span class="sourceLineNo">047</span> * Logic in use:<a name="line.47"></a>
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+<span class="sourceLineNo">050</span> * <li> Get all regions of a given table<a name="line.50"></a>
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+<span class="sourceLineNo">056</span> * <li> Otherwise, R1 is evaluated<a name="line.56"></a>
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+<span class="sourceLineNo">058</span> * <p><a name="line.58"></a>
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+<span class="sourceLineNo">061</span> * is by design to prevent normalization from undoing the pre-splitting of a table.<a name="line.61"></a>
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+<span class="sourceLineNo">066</span> private static final Logger LOG = LoggerFactory.getLogger(SimpleRegionNormalizer.class);<a name="line.66"></a>
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+<span class="sourceLineNo">072</span> public SimpleRegionNormalizer() {<a name="line.72"></a>
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+<span class="sourceLineNo">075</span> /**<a name="line.75"></a>
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+<span class="sourceLineNo">080</span> public void setMasterServices(MasterServices masterServices) {<a name="line.80"></a>
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+<span class="sourceLineNo">094</span> @Override<a name="line.94"></a>
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+<span class="sourceLineNo">097</span> }<a name="line.97"></a>
+<span class="sourceLineNo">098</span><a name="line.98"></a>
+<span class="sourceLineNo">099</span> /**<a name="line.99"></a>
+<span class="sourceLineNo">100</span> * Comparator class that gives higher priority to region Split plan.<a name="line.100"></a>
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+<span class="sourceLineNo">102</span> static class PlanComparator implements Comparator<NormalizationPlan> {<a name="line.102"></a>
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+<span class="sourceLineNo">105</span> boolean plan1IsSplit = plan1 instanceof SplitNormalizationPlan;<a name="line.105"></a>
+<span class="sourceLineNo">106</span> boolean plan2IsSplit = plan2 instanceof SplitNormalizationPlan;<a name="line.106"></a>
+<span class="sourceLineNo">107</span> if (plan1IsSplit && plan2IsSplit) {<a name="line.107"></a>
+<span class="sourceLineNo">108</span> return 0;<a name="line.108"></a>
+<span class="sourceLineNo">109</span> } else if (plan1IsSplit) {<a name="line.109"></a>
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-<span class="sourceLineNo">129</span> LOG.debug("Normalization of system table " + table + " isn't allowed");<a name="line.129"></a>
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-<span class="sourceLineNo">133</span> List<NormalizationPlan> plans = new ArrayList<>();<a name="line.133"></a>
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-<span class="sourceLineNo">137</span> //TODO: should we make min number of regions a config param?<a name="line.137"></a>
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-<span class="sourceLineNo">140</span> LOG.debug("Table " + table + " has " + nrRegions + " regions, required min number"<a name="line.140"></a>
-<span class="sourceLineNo">141</span> + " of regions for normalizer to run is " + minRegionCount + ", not running normalizer");<a name="line.141"></a>
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-<span class="sourceLineNo">145</span> LOG.debug("Computing normalization plan for table: " + table +<a name="line.145"></a>
-<span class="sourceLineNo">146</span> ", number of regions: " + tableRegions.size());<a name="line.146"></a>
-<span class="sourceLineNo">147</span><a name="line.147"></a>
-<span class="sourceLineNo">148</span> long totalSizeMb = 0;<a name="line.148"></a>
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-<span class="sourceLineNo">162</span> LOG.debug("Table " + table + ", total aggregated regions size: " + totalSizeMb);<a name="line.162"></a>
-<span class="sourceLineNo">163</span> LOG.debug("Table " + table + ", average region size: " + avgRegionSize);<a name="line.163"></a>
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-<span class="sourceLineNo">175</span> RequestConverter.buildIsSplitOrMergeEnabledRequest(MasterSwitchType.MERGE)).getEnabled();<a name="line.175"></a>
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-<span class="sourceLineNo">180</span> RegionInfo hri = tableRegions.get(candidateIdx);<a name="line.180"></a>
-<span class="sourceLineNo">181</span> long regionSize = getRegionSize(hri);<a name="line.181"></a>
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+<span class="sourceLineNo">121</span> /**<a name="line.121"></a>
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+<span class="sourceLineNo">131</span> LOG.debug("Normalization of system table " + table + " isn't allowed");<a name="line.131"></a>
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