http://git-wip-us.apache.org/repos/asf/hbase-site/blob/e5c3dcd1/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 4da8624..f912210 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 @@ -35,161 +35,153 @@ <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.TableName;<a name="line.27"></a> <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.28"></a> <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.master.MasterServices;<a name="line.29"></a> -<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.30"></a> +<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.util.Triple;<a name="line.30"></a> <span class="sourceLineNo">031</span><a name="line.31"></a> -<span class="sourceLineNo">032</span>import java.util.List;<a name="line.32"></a> -<span class="sourceLineNo">033</span><a name="line.33"></a> -<span class="sourceLineNo">034</span>/**<a name="line.34"></a> -<span class="sourceLineNo">035</span> * Simple implementation of region normalizer.<a name="line.35"></a> -<span class="sourceLineNo">036</span> *<a name="line.36"></a> -<span class="sourceLineNo">037</span> * Logic in use:<a name="line.37"></a> -<span class="sourceLineNo">038</span> *<a name="line.38"></a> -<span class="sourceLineNo">039</span> * <ol><a name="line.39"></a> -<span class="sourceLineNo">040</span> * <li> get all regions of a given table<a name="line.40"></a> -<span class="sourceLineNo">041</span> * <li> get avg size S of each region (by total size of store files reported in RegionLoad)<a name="line.41"></a> -<span class="sourceLineNo">042</span> * <li> If biggest region is bigger than S * 2, it is kindly requested to split,<a name="line.42"></a> -<span class="sourceLineNo">043</span> * and normalization stops<a name="line.43"></a> -<span class="sourceLineNo">044</span> * <li> Otherwise, two smallest region R1 and its smallest neighbor R2 are kindly requested<a name="line.44"></a> -<span class="sourceLineNo">045</span> * to merge, if R1 + R1 &lt; S, and normalization stops<a name="line.45"></a> -<span class="sourceLineNo">046</span> * <li> Otherwise, no action is performed<a name="line.46"></a> -<span class="sourceLineNo">047</span> * </ol><a name="line.47"></a> -<span class="sourceLineNo">048</span> * <p><a name="line.48"></a> -<span class="sourceLineNo">049</span> * Region sizes are coarse and approximate on the order of megabytes. Additionally,<a name="line.49"></a> -<span class="sourceLineNo">050</span> * "empty" regions (less than 1MB, with the previous note) are not merged away. This<a name="line.50"></a> -<span class="sourceLineNo">051</span> * is by design to prevent normalization from undoing the pre-splitting of a table.<a name="line.51"></a> -<span class="sourceLineNo">052</span> */<a name="line.52"></a> -<span class="sourceLineNo">053</span>@InterfaceAudience.Private<a name="line.53"></a> -<span class="sourceLineNo">054</span>public class SimpleRegionNormalizer implements RegionNormalizer {<a name="line.54"></a> -<span class="sourceLineNo">055</span><a name="line.55"></a> -<span class="sourceLineNo">056</span> private static final Log LOG = LogFactory.getLog(SimpleRegionNormalizer.class);<a name="line.56"></a> -<span class="sourceLineNo">057</span> private static final int MIN_REGION_COUNT = 3;<a name="line.57"></a> -<span class="sourceLineNo">058</span> private MasterServices masterServices;<a name="line.58"></a> -<span class="sourceLineNo">059</span><a name="line.59"></a> -<span class="sourceLineNo">060</span> /**<a name="line.60"></a> -<span class="sourceLineNo">061</span> * Set the master service.<a name="line.61"></a> -<span class="sourceLineNo">062</span> * @param masterServices inject instance of MasterServices<a name="line.62"></a> -<span class="sourceLineNo">063</span> */<a name="line.63"></a> -<span class="sourceLineNo">064</span> @Override<a name="line.64"></a> -<span class="sourceLineNo">065</span> public void setMasterServices(MasterServices masterServices) {<a name="line.65"></a> -<span class="sourceLineNo">066</span> this.masterServices = masterServices;<a name="line.66"></a> -<span class="sourceLineNo">067</span> }<a name="line.67"></a> -<span class="sourceLineNo">068</span><a name="line.68"></a> -<span class="sourceLineNo">069</span> /**<a name="line.69"></a> -<span class="sourceLineNo">070</span> * Computes next most "urgent" normalization action on the table.<a name="line.70"></a> -<span class="sourceLineNo">071</span> * Action may be either a split, or a merge, or no action.<a name="line.71"></a> -<span class="sourceLineNo">072</span> *<a name="line.72"></a> -<span class="sourceLineNo">073</span> * @param table table to normalize<a name="line.73"></a> -<span class="sourceLineNo">074</span> * @return normalization plan to execute<a name="line.74"></a> -<span class="sourceLineNo">075</span> */<a name="line.75"></a> -<span class="sourceLineNo">076</span> @Override<a name="line.76"></a> -<span class="sourceLineNo">077</span> public NormalizationPlan computePlanForTable(TableName table) throws HBaseIOException {<a name="line.77"></a> -<span class="sourceLineNo">078</span> if (table == null || table.isSystemTable()) {<a name="line.78"></a> -<span class="sourceLineNo">079</span> LOG.debug("Normalization of table " + table + " isn't allowed");<a name="line.79"></a> -<span class="sourceLineNo">080</span> return EmptyNormalizationPlan.getInstance();<a name="line.80"></a> -<span class="sourceLineNo">081</span> }<a name="line.81"></a> -<span class="sourceLineNo">082</span><a name="line.82"></a> -<span class="sourceLineNo">083</span> List<HRegionInfo> tableRegions = masterServices.getAssignmentManager().getRegionStates().<a name="line.83"></a> -<span class="sourceLineNo">084</span> getRegionsOfTable(table);<a name="line.84"></a> -<span class="sourceLineNo">085</span><a name="line.85"></a> -<span class="sourceLineNo">086</span> //TODO: should we make min number of regions a config param?<a name="line.86"></a> -<span class="sourceLineNo">087</span> if (tableRegions == null || tableRegions.size() < MIN_REGION_COUNT) {<a name="line.87"></a> -<span class="sourceLineNo">088</span> int nrRegions = tableRegions == null ? 0 : tableRegions.size();<a name="line.88"></a> -<span class="sourceLineNo">089</span> LOG.debug("Table " + table + " has " + nrRegions + " regions, required min number"<a name="line.89"></a> -<span class="sourceLineNo">090</span> + " of regions for normalizer to run is " + MIN_REGION_COUNT + ", not running normalizer");<a name="line.90"></a> -<span class="sourceLineNo">091</span> return EmptyNormalizationPlan.getInstance();<a name="line.91"></a> -<span class="sourceLineNo">092</span> }<a name="line.92"></a> -<span class="sourceLineNo">093</span><a name="line.93"></a> -<span class="sourceLineNo">094</span> LOG.debug("Computing normalization plan for table: " + table +<a name="line.94"></a> -<span class="sourceLineNo">095</span> ", number of regions: " + tableRegions.size());<a name="line.95"></a> -<span class="sourceLineNo">096</span><a name="line.96"></a> -<span class="sourceLineNo">097</span> long totalSizeMb = 0;<a name="line.97"></a> -<span class="sourceLineNo">098</span> Pair<HRegionInfo, Long> largestRegion = new Pair<>();<a name="line.98"></a> -<span class="sourceLineNo">099</span><a name="line.99"></a> -<span class="sourceLineNo">100</span> // A is a smallest region, B is it's smallest neighbor<a name="line.100"></a> -<span class="sourceLineNo">101</span> Pair<HRegionInfo, Long> smallestRegion = new Pair<>();<a name="line.101"></a> -<span class="sourceLineNo">102</span> int smallestRegionIndex = 0;<a name="line.102"></a> -<span class="sourceLineNo">103</span><a name="line.103"></a> -<span class="sourceLineNo">104</span> for (int i = 0; i < tableRegions.size(); i++) {<a name="line.104"></a> -<span class="sourceLineNo">105</span> HRegionInfo hri = tableRegions.get(i);<a name="line.105"></a> -<span class="sourceLineNo">106</span> long regionSize = getRegionSize(hri);<a name="line.106"></a> -<span class="sourceLineNo">107</span> totalSizeMb += regionSize;<a name="line.107"></a> -<span class="sourceLineNo">108</span><a name="line.108"></a> -<span class="sourceLineNo">109</span> if (largestRegion.getFirst() == null || regionSize > largestRegion.getSecond()) {<a name="line.109"></a> -<span class="sourceLineNo">110</span> largestRegion.setFirst(hri);<a name="line.110"></a> -<span class="sourceLineNo">111</span> largestRegion.setSecond(regionSize);<a name="line.111"></a> -<span class="sourceLineNo">112</span> }<a name="line.112"></a> -<span class="sourceLineNo">113</span><a name="line.113"></a> -<span class="sourceLineNo">114</span> if (smallestRegion.getFirst() == null || regionSize < smallestRegion.getSecond()) {<a name="line.114"></a> -<span class="sourceLineNo">115</span> smallestRegion.setFirst(hri);<a name="line.115"></a> -<span class="sourceLineNo">116</span> smallestRegion.setSecond(regionSize);<a name="line.116"></a> -<span class="sourceLineNo">117</span> smallestRegionIndex = i;<a name="line.117"></a> -<span class="sourceLineNo">118</span> }<a name="line.118"></a> -<span class="sourceLineNo">119</span> }<a name="line.119"></a> -<span class="sourceLineNo">120</span><a name="line.120"></a> -<span class="sourceLineNo">121</span> // now get smallest neighbor of smallest region<a name="line.121"></a> -<span class="sourceLineNo">122</span> long leftNeighborSize = -1;<a name="line.122"></a> -<span class="sourceLineNo">123</span><a name="line.123"></a> -<span class="sourceLineNo">124</span> if (smallestRegionIndex > 0) {<a name="line.124"></a> -<span class="sourceLineNo">125</span> leftNeighborSize = getRegionSize(tableRegions.get(smallestRegionIndex - 1));<a name="line.125"></a> -<span class="sourceLineNo">126</span> }<a name="line.126"></a> +<span class="sourceLineNo">032</span>import java.util.ArrayList;<a name="line.32"></a> +<span class="sourceLineNo">033</span>import java.util.Collections;<a name="line.33"></a> +<span class="sourceLineNo">034</span>import java.util.Comparator;<a name="line.34"></a> +<span class="sourceLineNo">035</span>import java.util.List;<a name="line.35"></a> +<span class="sourceLineNo">036</span><a name="line.36"></a> +<span class="sourceLineNo">037</span>/**<a name="line.37"></a> +<span class="sourceLineNo">038</span> * Simple implementation of region normalizer.<a name="line.38"></a> +<span class="sourceLineNo">039</span> *<a name="line.39"></a> +<span class="sourceLineNo">040</span> * Logic in use:<a name="line.40"></a> +<span class="sourceLineNo">041</span> *<a name="line.41"></a> +<span class="sourceLineNo">042</span> * <ol><a name="line.42"></a> +<span class="sourceLineNo">043</span> * <li> get all regions of a given table<a name="line.43"></a> +<span class="sourceLineNo">044</span> * <li> get avg size S of each region (by total size of store files reported in RegionLoad)<a name="line.44"></a> +<span class="sourceLineNo">045</span> * <li> If biggest region is bigger than S * 2, it is kindly requested to split,<a name="line.45"></a> +<span class="sourceLineNo">046</span> * and normalization stops<a name="line.46"></a> +<span class="sourceLineNo">047</span> * <li> Otherwise, two smallest region R1 and its smallest neighbor R2 are kindly requested<a name="line.47"></a> +<span class="sourceLineNo">048</span> * to merge, if R1 + R1 &lt; S, and normalization stops<a name="line.48"></a> +<span class="sourceLineNo">049</span> * <li> Otherwise, no action is performed<a name="line.49"></a> +<span class="sourceLineNo">050</span> * </ol><a name="line.50"></a> +<span class="sourceLineNo">051</span> * <p><a name="line.51"></a> +<span class="sourceLineNo">052</span> * Region sizes are coarse and approximate on the order of megabytes. Additionally,<a name="line.52"></a> +<span class="sourceLineNo">053</span> * "empty" regions (less than 1MB, with the previous note) are not merged away. This<a name="line.53"></a> +<span class="sourceLineNo">054</span> * is by design to prevent normalization from undoing the pre-splitting of a table.<a name="line.54"></a> +<span class="sourceLineNo">055</span> */<a name="line.55"></a> +<span class="sourceLineNo">056</span>@InterfaceAudience.Private<a name="line.56"></a> +<span class="sourceLineNo">057</span>public class SimpleRegionNormalizer implements RegionNormalizer {<a name="line.57"></a> +<span class="sourceLineNo">058</span><a name="line.58"></a> +<span class="sourceLineNo">059</span> private static final Log LOG = LogFactory.getLog(SimpleRegionNormalizer.class);<a name="line.59"></a> +<span class="sourceLineNo">060</span> private static final int MIN_REGION_COUNT = 3;<a name="line.60"></a> +<span class="sourceLineNo">061</span> private MasterServices masterServices;<a name="line.61"></a> +<span class="sourceLineNo">062</span><a name="line.62"></a> +<span class="sourceLineNo">063</span> /**<a name="line.63"></a> +<span class="sourceLineNo">064</span> * Set the master service.<a name="line.64"></a> +<span class="sourceLineNo">065</span> * @param masterServices inject instance of MasterServices<a name="line.65"></a> +<span class="sourceLineNo">066</span> */<a name="line.66"></a> +<span class="sourceLineNo">067</span> @Override<a name="line.67"></a> +<span class="sourceLineNo">068</span> public void setMasterServices(MasterServices masterServices) {<a name="line.68"></a> +<span class="sourceLineNo">069</span> this.masterServices = masterServices;<a name="line.69"></a> +<span class="sourceLineNo">070</span> }<a name="line.70"></a> +<span class="sourceLineNo">071</span><a name="line.71"></a> +<span class="sourceLineNo">072</span> /*<a name="line.72"></a> +<span class="sourceLineNo">073</span> * This comparator compares the region size.<a name="line.73"></a> +<span class="sourceLineNo">074</span> * The second element in the triple is region size while the 3rd element<a name="line.74"></a> +<span class="sourceLineNo">075</span> * is the index of the region in the underlying List<a name="line.75"></a> +<span class="sourceLineNo">076</span> */<a name="line.76"></a> +<span class="sourceLineNo">077</span> private Comparator<Triple<HRegionInfo, Long, Integer>> regionSizeComparator =<a name="line.77"></a> +<span class="sourceLineNo">078</span> new Comparator<Triple<HRegionInfo, Long, Integer>>() {<a name="line.78"></a> +<span class="sourceLineNo">079</span> @Override<a name="line.79"></a> +<span class="sourceLineNo">080</span> public int compare(Triple<HRegionInfo, Long, Integer> pair,<a name="line.80"></a> +<span class="sourceLineNo">081</span> Triple<HRegionInfo, Long, Integer> pair2) {<a name="line.81"></a> +<span class="sourceLineNo">082</span> long sz = pair.getSecond();<a name="line.82"></a> +<span class="sourceLineNo">083</span> long sz2 = pair2.getSecond();<a name="line.83"></a> +<span class="sourceLineNo">084</span> return (sz < sz2) ? -1 : ((sz == sz2) ? 0 : 1);<a name="line.84"></a> +<span class="sourceLineNo">085</span> }<a name="line.85"></a> +<span class="sourceLineNo">086</span> };<a name="line.86"></a> +<span class="sourceLineNo">087</span><a name="line.87"></a> +<span class="sourceLineNo">088</span> /**<a name="line.88"></a> +<span class="sourceLineNo">089</span> * Computes next most "urgent" normalization action on the table.<a name="line.89"></a> +<span class="sourceLineNo">090</span> * Action may be either a split, or a merge, or no action.<a name="line.90"></a> +<span class="sourceLineNo">091</span> *<a name="line.91"></a> +<span class="sourceLineNo">092</span> * @param table table to normalize<a name="line.92"></a> +<span class="sourceLineNo">093</span> * @return normalization plan to execute<a name="line.93"></a> +<span class="sourceLineNo">094</span> */<a name="line.94"></a> +<span class="sourceLineNo">095</span> @Override<a name="line.95"></a> +<span class="sourceLineNo">096</span> public NormalizationPlan computePlanForTable(TableName table) throws HBaseIOException {<a name="line.96"></a> +<span class="sourceLineNo">097</span> if (table == null || table.isSystemTable()) {<a name="line.97"></a> +<span class="sourceLineNo">098</span> LOG.debug("Normalization of system table " + table + " isn't allowed");<a name="line.98"></a> +<span class="sourceLineNo">099</span> return EmptyNormalizationPlan.getInstance();<a name="line.99"></a> +<span class="sourceLineNo">100</span> }<a name="line.100"></a> +<span class="sourceLineNo">101</span><a name="line.101"></a> +<span class="sourceLineNo">102</span> List<HRegionInfo> tableRegions = masterServices.getAssignmentManager().getRegionStates().<a name="line.102"></a> +<span class="sourceLineNo">103</span> getRegionsOfTable(table);<a name="line.103"></a> +<span class="sourceLineNo">104</span><a name="line.104"></a> +<span class="sourceLineNo">105</span> //TODO: should we make min number of regions a config param?<a name="line.105"></a> +<span class="sourceLineNo">106</span> if (tableRegions == null || tableRegions.size() < MIN_REGION_COUNT) {<a name="line.106"></a> +<span class="sourceLineNo">107</span> int nrRegions = tableRegions == null ? 0 : tableRegions.size();<a name="line.107"></a> +<span class="sourceLineNo">108</span> LOG.debug("Table " + table + " has " + nrRegions + " regions, required min number"<a name="line.108"></a> +<span class="sourceLineNo">109</span> + " of regions for normalizer to run is " + MIN_REGION_COUNT + ", not running normalizer");<a name="line.109"></a> +<span class="sourceLineNo">110</span> return EmptyNormalizationPlan.getInstance();<a name="line.110"></a> +<span class="sourceLineNo">111</span> }<a name="line.111"></a> +<span class="sourceLineNo">112</span><a name="line.112"></a> +<span class="sourceLineNo">113</span> LOG.debug("Computing normalization plan for table: " + table +<a name="line.113"></a> +<span class="sourceLineNo">114</span> ", number of regions: " + tableRegions.size());<a name="line.114"></a> +<span class="sourceLineNo">115</span><a name="line.115"></a> +<span class="sourceLineNo">116</span> long totalSizeMb = 0;<a name="line.116"></a> +<span class="sourceLineNo">117</span><a name="line.117"></a> +<span class="sourceLineNo">118</span> ArrayList<Triple<HRegionInfo, Long, Integer>> regionsWithSize =<a name="line.118"></a> +<span class="sourceLineNo">119</span> new ArrayList<Triple<HRegionInfo, Long, Integer>>(tableRegions.size());<a name="line.119"></a> +<span class="sourceLineNo">120</span> for (int i = 0; i < tableRegions.size(); i++) {<a name="line.120"></a> +<span class="sourceLineNo">121</span> HRegionInfo hri = tableRegions.get(i);<a name="line.121"></a> +<span class="sourceLineNo">122</span> long regionSize = getRegionSize(hri);<a name="line.122"></a> +<span class="sourceLineNo">123</span> regionsWithSize.add(new Triple<HRegionInfo, Long, Integer>(hri, regionSize, i));<a name="line.123"></a> +<span class="sourceLineNo">124</span> totalSizeMb += regionSize;<a name="line.124"></a> +<span class="sourceLineNo">125</span> }<a name="line.125"></a> +<span class="sourceLineNo">126</span> Collections.sort(regionsWithSize, regionSizeComparator);<a name="line.126"></a> <span class="sourceLineNo">127</span><a name="line.127"></a> -<span class="sourceLineNo">128</span> long rightNeighborSize = -1;<a name="line.128"></a> -<span class="sourceLineNo">129</span> if (smallestRegionIndex < tableRegions.size() - 1) {<a name="line.129"></a> -<span class="sourceLineNo">130</span> rightNeighborSize = getRegionSize(tableRegions.get(smallestRegionIndex + 1));<a name="line.130"></a> -<span class="sourceLineNo">131</span> }<a name="line.131"></a> -<span class="sourceLineNo">132</span><a name="line.132"></a> -<span class="sourceLineNo">133</span> Pair<HRegionInfo, Long> smallestNeighborOfSmallestRegion;<a name="line.133"></a> -<span class="sourceLineNo">134</span> if (leftNeighborSize == -1) {<a name="line.134"></a> -<span class="sourceLineNo">135</span> smallestNeighborOfSmallestRegion =<a name="line.135"></a> -<span class="sourceLineNo">136</span> new Pair<>(tableRegions.get(smallestRegionIndex + 1), rightNeighborSize);<a name="line.136"></a> -<span class="sourceLineNo">137</span> } else if (rightNeighborSize == -1) {<a name="line.137"></a> -<span class="sourceLineNo">138</span> smallestNeighborOfSmallestRegion =<a name="line.138"></a> -<span class="sourceLineNo">139</span> new Pair<>(tableRegions.get(smallestRegionIndex - 1), leftNeighborSize);<a name="line.139"></a> -<span class="sourceLineNo">140</span> } else {<a name="line.140"></a> -<span class="sourceLineNo">141</span> if (leftNeighborSize < rightNeighborSize) {<a name="line.141"></a> -<span class="sourceLineNo">142</span> smallestNeighborOfSmallestRegion =<a name="line.142"></a> -<span class="sourceLineNo">143</span> new Pair<>(tableRegions.get(smallestRegionIndex - 1), leftNeighborSize);<a name="line.143"></a> -<span class="sourceLineNo">144</span> } else {<a name="line.144"></a> -<span class="sourceLineNo">145</span> smallestNeighborOfSmallestRegion =<a name="line.145"></a> -<span class="sourceLineNo">146</span> new Pair<>(tableRegions.get(smallestRegionIndex + 1), rightNeighborSize);<a name="line.146"></a> -<span class="sourceLineNo">147</span> }<a name="line.147"></a> -<span class="sourceLineNo">148</span> }<a name="line.148"></a> -<span class="sourceLineNo">149</span><a name="line.149"></a> -<span class="sourceLineNo">150</span> double avgRegionSize = totalSizeMb / (double) tableRegions.size();<a name="line.150"></a> -<span class="sourceLineNo">151</span><a name="line.151"></a> -<span class="sourceLineNo">152</span> LOG.debug("Table " + table + ", total aggregated regions size: " + totalSizeMb);<a name="line.152"></a> -<span class="sourceLineNo">153</span> LOG.debug("Table " + table + ", average region size: " + avgRegionSize);<a name="line.153"></a> -<span class="sourceLineNo">154</span><a name="line.154"></a> -<span class="sourceLineNo">155</span> // now; if the largest region is >2 times large than average, we split it, split<a name="line.155"></a> -<span class="sourceLineNo">156</span> // is more high priority normalization action than merge.<a name="line.156"></a> -<span class="sourceLineNo">157</span> if (largestRegion.getSecond() > 2 * avgRegionSize) {<a name="line.157"></a> -<span class="sourceLineNo">158</span> LOG.debug("Table " + table + ", largest region "<a name="line.158"></a> -<span class="sourceLineNo">159</span> + largestRegion.getFirst().getRegionNameAsString() + " has size "<a name="line.159"></a> -<span class="sourceLineNo">160</span> + largestRegion.getSecond() + ", more than 2 times than avg size, splitting");<a name="line.160"></a> -<span class="sourceLineNo">161</span> return new SplitNormalizationPlan(largestRegion.getFirst(), null);<a name="line.161"></a> -<span class="sourceLineNo">162</span> } else {<a name="line.162"></a> -<span class="sourceLineNo">163</span> if (smallestRegion.getSecond() + smallestNeighborOfSmallestRegion.getSecond()<a name="line.163"></a> -<span class="sourceLineNo">164</span> < avgRegionSize) {<a name="line.164"></a> -<span class="sourceLineNo">165</span> LOG.debug("Table " + table + ", smallest region size: " + smallestRegion.getSecond()<a name="line.165"></a> -<span class="sourceLineNo">166</span> + " and its smallest neighbor size: " + smallestNeighborOfSmallestRegion.getSecond()<a name="line.166"></a> -<span class="sourceLineNo">167</span> + ", less than the avg size, merging them");<a name="line.167"></a> -<span class="sourceLineNo">168</span> return new MergeNormalizationPlan(smallestRegion.getFirst(),<a name="line.168"></a> -<span class="sourceLineNo">169</span> smallestNeighborOfSmallestRegion.getFirst());<a name="line.169"></a> -<span class="sourceLineNo">170</span> } else {<a name="line.170"></a> -<span class="sourceLineNo">171</span> LOG.debug("No normalization needed, regions look good for table: " + table);<a name="line.171"></a> -<span class="sourceLineNo">172</span> return EmptyNormalizationPlan.getInstance();<a name="line.172"></a> -<span class="sourceLineNo">173</span> }<a name="line.173"></a> -<span class="sourceLineNo">174</span> }<a name="line.174"></a> +<span class="sourceLineNo">128</span> Triple<HRegionInfo, Long, Integer> largestRegion = regionsWithSize.get(tableRegions.size()-1);<a name="line.128"></a> +<span class="sourceLineNo">129</span><a name="line.129"></a> +<span class="sourceLineNo">130</span> double avgRegionSize = totalSizeMb / (double) tableRegions.size();<a name="line.130"></a> +<span class="sourceLineNo">131</span><a name="line.131"></a> +<span class="sourceLineNo">132</span> LOG.debug("Table " + table + ", total aggregated regions size: " + totalSizeMb);<a name="line.132"></a> +<span class="sourceLineNo">133</span> LOG.debug("Table " + table + ", average region size: " + avgRegionSize);<a name="line.133"></a> +<span class="sourceLineNo">134</span><a name="line.134"></a> +<span class="sourceLineNo">135</span> // now; if the largest region is >2 times large than average, we split it, split<a name="line.135"></a> +<span class="sourceLineNo">136</span> // is more high priority normalization action than merge.<a name="line.136"></a> +<span class="sourceLineNo">137</span> if (largestRegion.getSecond() > 2 * avgRegionSize) {<a name="line.137"></a> +<span class="sourceLineNo">138</span> LOG.debug("Table " + table + ", largest region "<a name="line.138"></a> +<span class="sourceLineNo">139</span> + largestRegion.getFirst().getRegionNameAsString() + " has size "<a name="line.139"></a> +<span class="sourceLineNo">140</span> + largestRegion.getSecond() + ", more than 2 times than avg size, splitting");<a name="line.140"></a> +<span class="sourceLineNo">141</span> return new SplitNormalizationPlan(largestRegion.getFirst(), null);<a name="line.141"></a> +<span class="sourceLineNo">142</span> }<a name="line.142"></a> +<span class="sourceLineNo">143</span> int candidateIdx = 0;<a name="line.143"></a> +<span class="sourceLineNo">144</span> // look for two successive entries whose indices are adjacent<a name="line.144"></a> +<span class="sourceLineNo">145</span> while (candidateIdx < tableRegions.size()-1) {<a name="line.145"></a> +<span class="sourceLineNo">146</span> if (Math.abs(regionsWithSize.get(candidateIdx).getThird() -<a name="line.146"></a> +<span class="sourceLineNo">147</span> regionsWithSize.get(candidateIdx + 1).getThird()) == 1) {<a name="line.147"></a> +<span class="sourceLineNo">148</span> break;<a name="line.148"></a> +<span class="sourceLineNo">149</span> }<a name="line.149"></a> +<span class="sourceLineNo">150</span> candidateIdx++;<a name="line.150"></a> +<span class="sourceLineNo">151</span> }<a name="line.151"></a> +<span class="sourceLineNo">152</span> if (candidateIdx == tableRegions.size()-1) {<a name="line.152"></a> +<span class="sourceLineNo">153</span> LOG.debug("No neighboring regions found for table: " + table);<a name="line.153"></a> +<span class="sourceLineNo">154</span> return EmptyNormalizationPlan.getInstance();<a name="line.154"></a> +<span class="sourceLineNo">155</span> }<a name="line.155"></a> +<span class="sourceLineNo">156</span> Triple<HRegionInfo, Long, Integer> candidateRegion = regionsWithSize.get(candidateIdx);<a name="line.156"></a> +<span class="sourceLineNo">157</span> Triple<HRegionInfo, Long, Integer> candidateRegion2 = regionsWithSize.get(candidateIdx+1);<a name="line.157"></a> +<span class="sourceLineNo">158</span> if (candidateRegion.getSecond() + candidateRegion2.getSecond() < avgRegionSize) {<a name="line.158"></a> +<span class="sourceLineNo">159</span> LOG.debug("Table " + table + ", smallest region size: " + candidateRegion.getSecond()<a name="line.159"></a> +<span class="sourceLineNo">160</span> + " and its smallest neighbor size: " + candidateRegion2.getSecond()<a name="line.160"></a> +<span class="sourceLineNo">161</span> + ", less than the avg size, merging them");<a name="line.161"></a> +<span class="sourceLineNo">162</span> return new MergeNormalizationPlan(candidateRegion.getFirst(),<a name="line.162"></a> +<span class="sourceLineNo">163</span> candidateRegion2.getFirst());<a name="line.163"></a> +<span class="sourceLineNo">164</span> }<a name="line.164"></a> +<span class="sourceLineNo">165</span> LOG.debug("No normalization needed, regions look good for table: " + table);<a name="line.165"></a> +<span class="sourceLineNo">166</span> return EmptyNormalizationPlan.getInstance();<a name="line.166"></a> +<span class="sourceLineNo">167</span> }<a name="line.167"></a> +<span class="sourceLineNo">168</span><a name="line.168"></a> +<span class="sourceLineNo">169</span> private long getRegionSize(HRegionInfo hri) {<a name="line.169"></a> +<span class="sourceLineNo">170</span> ServerName sn = masterServices.getAssignmentManager().getRegionStates().<a name="line.170"></a> +<span class="sourceLineNo">171</span> getRegionServerOfRegion(hri);<a name="line.171"></a> +<span class="sourceLineNo">172</span> RegionLoad regionLoad = masterServices.getServerManager().getLoad(sn).<a name="line.172"></a> +<span class="sourceLineNo">173</span> getRegionsLoad().get(hri.getRegionName());<a name="line.173"></a> +<span class="sourceLineNo">174</span> return regionLoad.getStorefileSizeMB();<a name="line.174"></a> <span class="sourceLineNo">175</span> }<a name="line.175"></a> -<span class="sourceLineNo">176</span><a name="line.176"></a> -<span class="sourceLineNo">177</span> private long getRegionSize(HRegionInfo hri) {<a name="line.177"></a> -<span class="sourceLineNo">178</span> ServerName sn = masterServices.getAssignmentManager().getRegionStates().<a name="line.178"></a> -<span class="sourceLineNo">179</span> getRegionServerOfRegion(hri);<a name="line.179"></a> -<span class="sourceLineNo">180</span> RegionLoad regionLoad = masterServices.getServerManager().getLoad(sn).<a name="line.180"></a> -<span class="sourceLineNo">181</span> getRegionsLoad().get(hri.getRegionName());<a name="line.181"></a> -<span class="sourceLineNo">182</span> return regionLoad.getStorefileSizeMB();<a name="line.182"></a> -<span class="sourceLineNo">183</span> }<a name="line.183"></a> -<span class="sourceLineNo">184</span>}<a name="line.184"></a> +<span class="sourceLineNo">176</span>}<a name="line.176"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/e5c3dcd1/devapidocs/src-html/org/apache/hadoop/hbase/nio/SingleByteBuff.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/nio/SingleByteBuff.html b/devapidocs/src-html/org/apache/hadoop/hbase/nio/SingleByteBuff.html index 89d53dc..bca4f40 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/nio/SingleByteBuff.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/nio/SingleByteBuff.html @@ -42,298 +42,299 @@ <span class="sourceLineNo">034</span>public class SingleByteBuff extends ByteBuff {<a name="line.34"></a> <span class="sourceLineNo">035</span><a name="line.35"></a> <span class="sourceLineNo">036</span> private static final boolean UNSAFE_AVAIL = UnsafeAccess.isAvailable();<a name="line.36"></a> -<span class="sourceLineNo">037</span><a name="line.37"></a> -<span class="sourceLineNo">038</span> // Underlying BB<a name="line.38"></a> -<span 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