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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<span class="sourceLineNo">011</span> *<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.regionserver.throttle;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import static org.junit.Assert.assertEquals;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import static org.junit.Assert.assertTrue;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import static org.junit.Assert.fail;<a name="line.22"></a>
<span class="sourceLineNo">023</span><a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.io.IOException;<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 java.util.concurrent.TimeUnit;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.hadoop.conf.Configuration;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.HBaseTestingUtil;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.SingleProcessHBaseCluster;<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.ColumnFamilyDescriptorBuilder;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.client.Connection;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.client.ConnectionFactory;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.client.Put;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.client.Table;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.client.TableDescriptorBuilder;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.regionserver.DefaultStoreEngine;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.regionserver.HRegion;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.regionserver.HRegionServer;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.regionserver.HStore;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.regionserver.Region;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.regionserver.StoreEngine;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.regionserver.StripeStoreEngine;<a name="line.44"></a>
<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.testclassification.LargeTests;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.46"></a>
<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.util.JVMClusterUtil;<a name="line.47"></a>
<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.48"></a>
<span class="sourceLineNo">049</span>import org.junit.After;<a name="line.49"></a>
<span class="sourceLineNo">050</span>import org.junit.Before;<a name="line.50"></a>
<span class="sourceLineNo">051</span>import org.junit.ClassRule;<a name="line.51"></a>
<span class="sourceLineNo">052</span>import org.junit.Rule;<a name="line.52"></a>
<span class="sourceLineNo">053</span>import org.junit.Test;<a name="line.53"></a>
<span class="sourceLineNo">054</span>import org.junit.experimental.categories.Category;<a name="line.54"></a>
<span class="sourceLineNo">055</span>import org.junit.rules.TestName;<a name="line.55"></a>
<span class="sourceLineNo">056</span>import org.slf4j.Logger;<a name="line.56"></a>
<span class="sourceLineNo">057</span>import org.slf4j.LoggerFactory;<a name="line.57"></a>
<span class="sourceLineNo">058</span><a name="line.58"></a>
<span class="sourceLineNo">059</span>@Category(LargeTests.class)<a name="line.59"></a>
<span class="sourceLineNo">060</span>public class TestFlushWithThroughputController {<a name="line.60"></a>
<span class="sourceLineNo">061</span><a name="line.61"></a>
<span class="sourceLineNo">062</span> @ClassRule<a name="line.62"></a>
<span class="sourceLineNo">063</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.63"></a>
<span class="sourceLineNo">064</span> HBaseClassTestRule.forClass(TestFlushWithThroughputController.class);<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 =<a name="line.66"></a>
<span class="sourceLineNo">067</span> LoggerFactory.getLogger(TestFlushWithThroughputController.class);<a name="line.67"></a>
<span class="sourceLineNo">068</span> private static final double EPSILON = 1.3E-6;<a name="line.68"></a>
<span class="sourceLineNo">069</span><a name="line.69"></a>
<span class="sourceLineNo">070</span> private HBaseTestingUtil hbtu;<a name="line.70"></a>
<span class="sourceLineNo">071</span> @Rule<a name="line.71"></a>
<span class="sourceLineNo">072</span> public TestName testName = new TestName();<a name="line.72"></a>
<span class="sourceLineNo">073</span> private TableName tableName;<a name="line.73"></a>
<span class="sourceLineNo">074</span> private final byte[] family = Bytes.toBytes("f");<a name="line.74"></a>
<span class="sourceLineNo">075</span> private final byte[] qualifier = Bytes.toBytes("q");<a name="line.75"></a>
<span class="sourceLineNo">076</span><a name="line.76"></a>
<span class="sourceLineNo">077</span> @Before<a name="line.77"></a>
<span class="sourceLineNo">078</span> public void setUp() {<a name="line.78"></a>
<span class="sourceLineNo">079</span> hbtu = new HBaseTestingUtil();<a name="line.79"></a>
<span class="sourceLineNo">080</span> tableName = TableName.valueOf("Table-" + testName.getMethodName());<a name="line.80"></a>
<span class="sourceLineNo">081</span> hbtu.getConfiguration().set(<a name="line.81"></a>
<span class="sourceLineNo">082</span> FlushThroughputControllerFactory.HBASE_FLUSH_THROUGHPUT_CONTROLLER_KEY,<a name="line.82"></a>
<span class="sourceLineNo">083</span> PressureAwareFlushThroughputController.class.getName());<a name="line.83"></a>
<span class="sourceLineNo">084</span> }<a name="line.84"></a>
<span class="sourceLineNo">085</span><a name="line.85"></a>
<span class="sourceLineNo">086</span> @After<a name="line.86"></a>
<span class="sourceLineNo">087</span> public void tearDown() throws Exception {<a name="line.87"></a>
<span class="sourceLineNo">088</span> hbtu.shutdownMiniCluster();<a name="line.88"></a>
<span class="sourceLineNo">089</span> }<a name="line.89"></a>
<span class="sourceLineNo">090</span><a name="line.90"></a>
<span class="sourceLineNo">091</span> private HStore getStoreWithName(TableName tableName) {<a name="line.91"></a>
<span class="sourceLineNo">092</span> SingleProcessHBaseCluster cluster = hbtu.getMiniHBaseCluster();<a name="line.92"></a>
<span class="sourceLineNo">093</span> List&lt;JVMClusterUtil.RegionServerThread&gt; rsts = cluster.getRegionServerThreads();<a name="line.93"></a>
<span class="sourceLineNo">094</span> for (int i = 0; i &lt; cluster.getRegionServerThreads().size(); i++) {<a name="line.94"></a>
<span class="sourceLineNo">095</span> HRegionServer hrs = rsts.get(i).getRegionServer();<a name="line.95"></a>
<span class="sourceLineNo">096</span> for (Region region : hrs.getRegions(tableName)) {<a name="line.96"></a>
<span class="sourceLineNo">097</span> return ((HRegion) region).getStores().iterator().next();<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> return null;<a name="line.100"></a>
<span class="sourceLineNo">101</span> }<a name="line.101"></a>
<span class="sourceLineNo">102</span><a name="line.102"></a>
<span class="sourceLineNo">103</span> private void setMaxMinThroughputs(long max, long min) {<a name="line.103"></a>
<span class="sourceLineNo">104</span> Configuration conf = hbtu.getConfiguration();<a name="line.104"></a>
<span class="sourceLineNo">105</span> conf.setLong(<a name="line.105"></a>
<span class="sourceLineNo">106</span> PressureAwareFlushThroughputController.HBASE_HSTORE_FLUSH_MAX_THROUGHPUT_LOWER_BOUND, min);<a name="line.106"></a>
<span class="sourceLineNo">107</span> conf.setLong(<a name="line.107"></a>
<span class="sourceLineNo">108</span> PressureAwareFlushThroughputController.HBASE_HSTORE_FLUSH_MAX_THROUGHPUT_UPPER_BOUND, max);<a name="line.108"></a>
<span class="sourceLineNo">109</span> }<a name="line.109"></a>
<span class="sourceLineNo">110</span><a name="line.110"></a>
<span class="sourceLineNo">111</span> /**<a name="line.111"></a>
<span class="sourceLineNo">112</span> * Writes Puts to the table and flushes few times.<a name="line.112"></a>
<span class="sourceLineNo">113</span> * @return {@link Pair} of (throughput, duration).<a name="line.113"></a>
<span class="sourceLineNo">114</span> */<a name="line.114"></a>
<span class="sourceLineNo">115</span> private Pair&lt;Double, Long&gt; generateAndFlushData(Table table) throws IOException {<a name="line.115"></a>
<span class="sourceLineNo">116</span> // Internally, throughput is controlled after every cell write, so keep value size less for<a name="line.116"></a>
<span class="sourceLineNo">117</span> // better control.<a name="line.117"></a>
<span class="sourceLineNo">118</span> final int NUM_FLUSHES = 3, NUM_PUTS = 50, VALUE_SIZE = 200 * 1024;<a name="line.118"></a>
<span class="sourceLineNo">119</span> long duration = 0;<a name="line.119"></a>
<span class="sourceLineNo">120</span> for (int i = 0; i &lt; NUM_FLUSHES; i++) {<a name="line.120"></a>
<span class="sourceLineNo">121</span> // Write about 10M (10 times of throughput rate) per iteration.<a name="line.121"></a>
<span class="sourceLineNo">122</span> for (int j = 0; j &lt; NUM_PUTS; j++) {<a name="line.122"></a>
<span class="sourceLineNo">123</span> byte[] value = new byte[VALUE_SIZE];<a name="line.123"></a>
<span class="sourceLineNo">124</span> Bytes.random(value);<a name="line.124"></a>
<span class="sourceLineNo">125</span> table.put(new Put(Bytes.toBytes(i * 10 + j)).addColumn(family, qualifier, value));<a name="line.125"></a>
<span class="sourceLineNo">126</span> }<a name="line.126"></a>
<span class="sourceLineNo">127</span> long startTime = System.nanoTime();<a name="line.127"></a>
<span class="sourceLineNo">128</span> hbtu.getHBaseCluster().getRegions(tableName).stream().findFirst().ifPresent(r -&gt; {<a name="line.128"></a>
<span class="sourceLineNo">129</span> try {<a name="line.129"></a>
<span class="sourceLineNo">130</span> r.flush(true);<a name="line.130"></a>
<span class="sourceLineNo">131</span> } catch (IOException e) {<a name="line.131"></a>
<span class="sourceLineNo">132</span> LOG.error("Failed flush region {}", r, e);<a name="line.132"></a>
<span class="sourceLineNo">133</span> fail("Failed flush region " + r.getRegionInfo().getRegionNameAsString());<a name="line.133"></a>
<span class="sourceLineNo">134</span> }<a name="line.134"></a>
<span class="sourceLineNo">135</span> });<a name="line.135"></a>
<span class="sourceLineNo">136</span> duration += System.nanoTime() - startTime;<a name="line.136"></a>
<span class="sourceLineNo">137</span> }<a name="line.137"></a>
<span class="sourceLineNo">138</span> HStore store = getStoreWithName(tableName);<a name="line.138"></a>
<span class="sourceLineNo">139</span> assertEquals(NUM_FLUSHES, store.getStorefilesCount());<a name="line.139"></a>
<span class="sourceLineNo">140</span> double throughput =<a name="line.140"></a>
<span class="sourceLineNo">141</span> (double) store.getStorefilesSize() / TimeUnit.NANOSECONDS.toSeconds(duration);<a name="line.141"></a>
<span class="sourceLineNo">142</span> return new Pair&lt;&gt;(throughput, duration);<a name="line.142"></a>
<span class="sourceLineNo">143</span> }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span> private long testFlushWithThroughputLimit() throws Exception {<a name="line.145"></a>
<span class="sourceLineNo">146</span> final long throughputLimit = 1024 * 1024;<a name="line.146"></a>
<span class="sourceLineNo">147</span> setMaxMinThroughputs(throughputLimit, throughputLimit);<a name="line.147"></a>
<span class="sourceLineNo">148</span> Configuration conf = hbtu.getConfiguration();<a name="line.148"></a>
<span class="sourceLineNo">149</span> conf.setLong(<a name="line.149"></a>
<span class="sourceLineNo">150</span> PressureAwareFlushThroughputController.HBASE_HSTORE_FLUSH_THROUGHPUT_CONTROL_CHECK_INTERVAL,<a name="line.150"></a>
<span class="sourceLineNo">151</span> throughputLimit);<a name="line.151"></a>
<span class="sourceLineNo">152</span> hbtu.startMiniCluster(1);<a name="line.152"></a>
<span class="sourceLineNo">153</span> Table table = hbtu.createTable(tableName, family);<a name="line.153"></a>
<span class="sourceLineNo">154</span> Pair&lt;Double, Long&gt; result = generateAndFlushData(table);<a name="line.154"></a>
<span class="sourceLineNo">155</span> hbtu.deleteTable(tableName);<a name="line.155"></a>
<span class="sourceLineNo">156</span> LOG.debug("Throughput is: " + (result.getFirst() / 1024 / 1024) + " MB/s");<a name="line.156"></a>
<span class="sourceLineNo">157</span> // confirm that the speed limit work properly(not too fast, and also not too slow)<a name="line.157"></a>
<span class="sourceLineNo">158</span> // 20% is the max acceptable error rate.<a name="line.158"></a>
<span class="sourceLineNo">159</span> assertTrue(result.getFirst() &lt; throughputLimit * 1.2);<a name="line.159"></a>
<span class="sourceLineNo">160</span> assertTrue(result.getFirst() &gt; throughputLimit * 0.8);<a name="line.160"></a>
<span class="sourceLineNo">161</span> return result.getSecond();<a name="line.161"></a>
<span class="sourceLineNo">162</span> }<a name="line.162"></a>
<span class="sourceLineNo">163</span><a name="line.163"></a>
<span class="sourceLineNo">164</span> @Test<a name="line.164"></a>
<span class="sourceLineNo">165</span> public void testFlushControl() throws Exception {<a name="line.165"></a>
<span class="sourceLineNo">166</span> testFlushWithThroughputLimit();<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> /**<a name="line.169"></a>
<span class="sourceLineNo">170</span> * Test the tuning task of {@link PressureAwareFlushThroughputController}<a name="line.170"></a>
<span class="sourceLineNo">171</span> */<a name="line.171"></a>
<span class="sourceLineNo">172</span> @Test<a name="line.172"></a>
<span class="sourceLineNo">173</span> public void testFlushThroughputTuning() throws Exception {<a name="line.173"></a>
<span class="sourceLineNo">174</span> Configuration conf = hbtu.getConfiguration();<a name="line.174"></a>
<span class="sourceLineNo">175</span> setMaxMinThroughputs(20L * 1024 * 1024, 10L * 1024 * 1024);<a name="line.175"></a>
<span class="sourceLineNo">176</span> conf.set(StoreEngine.STORE_ENGINE_CLASS_KEY, DefaultStoreEngine.class.getName());<a name="line.176"></a>
<span class="sourceLineNo">177</span> conf.setInt(PressureAwareFlushThroughputController.HBASE_HSTORE_FLUSH_THROUGHPUT_TUNE_PERIOD,<a name="line.177"></a>
<span class="sourceLineNo">178</span> 3000);<a name="line.178"></a>
<span class="sourceLineNo">179</span> hbtu.startMiniCluster(1);<a name="line.179"></a>
<span class="sourceLineNo">180</span> Connection conn = ConnectionFactory.createConnection(conf);<a name="line.180"></a>
<span class="sourceLineNo">181</span> hbtu.getAdmin()<a name="line.181"></a>
<span class="sourceLineNo">182</span> .createTable(TableDescriptorBuilder.newBuilder(tableName)<a name="line.182"></a>
<span class="sourceLineNo">183</span> .setColumnFamily(ColumnFamilyDescriptorBuilder.of(family)).setCompactionEnabled(false)<a name="line.183"></a>
<span class="sourceLineNo">184</span> .build());<a name="line.184"></a>
<span class="sourceLineNo">185</span> hbtu.waitTableAvailable(tableName);<a name="line.185"></a>
<span class="sourceLineNo">186</span> HRegionServer regionServer = hbtu.getRSForFirstRegionInTable(tableName);<a name="line.186"></a>
<span class="sourceLineNo">187</span> double pressure = regionServer.getFlushPressure();<a name="line.187"></a>
<span class="sourceLineNo">188</span> LOG.debug("Flush pressure before flushing: " + pressure);<a name="line.188"></a>
<span class="sourceLineNo">189</span> PressureAwareFlushThroughputController throughputController =<a name="line.189"></a>
<span class="sourceLineNo">190</span> (PressureAwareFlushThroughputController) regionServer.getFlushThroughputController();<a name="line.190"></a>
<span class="sourceLineNo">191</span> for (HRegion region : regionServer.getRegions()) {<a name="line.191"></a>
<span class="sourceLineNo">192</span> region.flush(true);<a name="line.192"></a>
<span class="sourceLineNo">193</span> }<a name="line.193"></a>
<span class="sourceLineNo">194</span> // We used to assert that the flush pressure is zero but after HBASE-15787 or HBASE-18294 we<a name="line.194"></a>
<span class="sourceLineNo">195</span> // changed to use heapSize instead of dataSize to calculate the flush pressure, and since<a name="line.195"></a>
<span class="sourceLineNo">196</span> // heapSize will never be zero, so flush pressure will never be zero either. So we changed the<a name="line.196"></a>
<span class="sourceLineNo">197</span> // assertion here.<a name="line.197"></a>
<span class="sourceLineNo">198</span> assertTrue(regionServer.getFlushPressure() &lt; pressure);<a name="line.198"></a>
<span class="sourceLineNo">199</span> Thread.sleep(5000);<a name="line.199"></a>
<span class="sourceLineNo">200</span> Table table = conn.getTable(tableName);<a name="line.200"></a>
<span class="sourceLineNo">201</span> for (int i = 0; i &lt; 10; i++) {<a name="line.201"></a>
<span class="sourceLineNo">202</span> for (int j = 0; j &lt; 10; j++) {<a name="line.202"></a>
<span class="sourceLineNo">203</span> byte[] value = new byte[256 * 1024];<a name="line.203"></a>
<span class="sourceLineNo">204</span> Bytes.random(value);<a name="line.204"></a>
<span class="sourceLineNo">205</span> table.put(new Put(Bytes.toBytes(i * 10 + j)).addColumn(family, qualifier, value));<a name="line.205"></a>
<span class="sourceLineNo">206</span> }<a name="line.206"></a>
<span class="sourceLineNo">207</span> }<a name="line.207"></a>
<span class="sourceLineNo">208</span> Thread.sleep(5000);<a name="line.208"></a>
<span class="sourceLineNo">209</span> double expectedThroughPut = 10L * 1024 * 1024 * (1 + regionServer.getFlushPressure());<a name="line.209"></a>
<span class="sourceLineNo">210</span> assertEquals(expectedThroughPut, throughputController.getMaxThroughput(), EPSILON);<a name="line.210"></a>
<span class="sourceLineNo">211</span><a name="line.211"></a>
<span class="sourceLineNo">212</span> conf.set(FlushThroughputControllerFactory.HBASE_FLUSH_THROUGHPUT_CONTROLLER_KEY,<a name="line.212"></a>
<span class="sourceLineNo">213</span> NoLimitThroughputController.class.getName());<a name="line.213"></a>
<span class="sourceLineNo">214</span> regionServer.onConfigurationChange(conf);<a name="line.214"></a>
<span class="sourceLineNo">215</span> assertTrue(throughputController.isStopped());<a name="line.215"></a>
<span class="sourceLineNo">216</span> assertTrue(regionServer.getFlushThroughputController() instanceof NoLimitThroughputController);<a name="line.216"></a>
<span class="sourceLineNo">217</span> conn.close();<a name="line.217"></a>
<span class="sourceLineNo">218</span> }<a name="line.218"></a>
<span class="sourceLineNo">219</span><a name="line.219"></a>
<span class="sourceLineNo">220</span> /**<a name="line.220"></a>
<span class="sourceLineNo">221</span> * Test the logic for striped store.<a name="line.221"></a>
<span class="sourceLineNo">222</span> */<a name="line.222"></a>
<span class="sourceLineNo">223</span> @Test<a name="line.223"></a>
<span class="sourceLineNo">224</span> public void testFlushControlForStripedStore() throws Exception {<a name="line.224"></a>
<span class="sourceLineNo">225</span> hbtu.getConfiguration().set(StoreEngine.STORE_ENGINE_CLASS_KEY,<a name="line.225"></a>
<span class="sourceLineNo">226</span> StripeStoreEngine.class.getName());<a name="line.226"></a>
<span class="sourceLineNo">227</span> testFlushWithThroughputLimit();<a name="line.227"></a>
<span class="sourceLineNo">228</span> }<a name="line.228"></a>
<span class="sourceLineNo">229</span>}<a name="line.229"></a>
</pre>
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