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From mi...@apache.org
Subject [17/24] hbase git commit: Published site at 0d72849581c1e5a50a2aa7757b909e5531b8d12c.
Date Thu, 26 Nov 2015 21:52:41 GMT
http://git-wip-us.apache.org/repos/asf/hbase/blob/2fa570dd/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/DefaultMemStore.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/DefaultMemStore.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/DefaultMemStore.html
index c069622..c031492 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/DefaultMemStore.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/DefaultMemStore.html
@@ -48,949 +48,957 @@
 <span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.KeyValueUtil;<a name="line.40"></a>
 <span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.41"></a>
 <span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.client.Scan;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.util.ByteRange;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.util.ClassSize;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.util.CollectionBackedScanner;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.util.ReflectionUtils;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import org.apache.htrace.Trace;<a name="line.49"></a>
-<span class="sourceLineNo">050</span><a name="line.50"></a>
-<span class="sourceLineNo">051</span>/**<a name="line.51"></a>
-<span class="sourceLineNo">052</span> * The MemStore holds in-memory modifications to the Store.  Modifications<a name="line.52"></a>
-<span class="sourceLineNo">053</span> * are {@link Cell}s.  When asked to flush, current memstore is moved<a name="line.53"></a>
-<span class="sourceLineNo">054</span> * to snapshot and is cleared.  We continue to serve edits out of new memstore<a name="line.54"></a>
-<span class="sourceLineNo">055</span> * and backing snapshot until flusher reports in that the flush succeeded. At<a name="line.55"></a>
-<span class="sourceLineNo">056</span> * this point we let the snapshot go.<a name="line.56"></a>
-<span class="sourceLineNo">057</span> *  &lt;p&gt;<a name="line.57"></a>
-<span class="sourceLineNo">058</span> * The MemStore functions should not be called in parallel. Callers should hold<a name="line.58"></a>
-<span class="sourceLineNo">059</span> *  write and read locks. This is done in {@link HStore}.<a name="line.59"></a>
-<span class="sourceLineNo">060</span> *  &lt;/p&gt;<a name="line.60"></a>
-<span class="sourceLineNo">061</span> *<a name="line.61"></a>
-<span class="sourceLineNo">062</span> * TODO: Adjust size of the memstore when we remove items because they have<a name="line.62"></a>
-<span class="sourceLineNo">063</span> * been deleted.<a name="line.63"></a>
-<span class="sourceLineNo">064</span> * TODO: With new KVSLS, need to make sure we update HeapSize with difference<a name="line.64"></a>
-<span class="sourceLineNo">065</span> * in KV size.<a name="line.65"></a>
-<span class="sourceLineNo">066</span> */<a name="line.66"></a>
-<span class="sourceLineNo">067</span>@InterfaceAudience.Private<a name="line.67"></a>
-<span class="sourceLineNo">068</span>public class DefaultMemStore implements MemStore {<a name="line.68"></a>
-<span class="sourceLineNo">069</span>  private static final Log LOG = LogFactory.getLog(DefaultMemStore.class);<a name="line.69"></a>
-<span class="sourceLineNo">070</span>  static final String USEMSLAB_KEY = "hbase.hregion.memstore.mslab.enabled";<a name="line.70"></a>
-<span class="sourceLineNo">071</span>  private static final boolean USEMSLAB_DEFAULT = true;<a name="line.71"></a>
-<span class="sourceLineNo">072</span>  static final String MSLAB_CLASS_NAME = "hbase.regionserver.mslab.class";<a name="line.72"></a>
-<span class="sourceLineNo">073</span><a name="line.73"></a>
-<span class="sourceLineNo">074</span>  private Configuration conf;<a name="line.74"></a>
-<span class="sourceLineNo">075</span><a name="line.75"></a>
-<span class="sourceLineNo">076</span>  // MemStore.  Use a CellSkipListSet rather than SkipListSet because of the<a name="line.76"></a>
-<span class="sourceLineNo">077</span>  // better semantics.  The Map will overwrite if passed a key it already had<a name="line.77"></a>
-<span class="sourceLineNo">078</span>  // whereas the Set will not add new Cell if key is same though value might be<a name="line.78"></a>
-<span class="sourceLineNo">079</span>  // different.  Value is not important -- just make sure always same<a name="line.79"></a>
-<span class="sourceLineNo">080</span>  // reference passed.<a name="line.80"></a>
-<span class="sourceLineNo">081</span>  volatile CellSkipListSet cellSet;<a name="line.81"></a>
-<span class="sourceLineNo">082</span><a name="line.82"></a>
-<span class="sourceLineNo">083</span>  // Snapshot of memstore.  Made for flusher.<a name="line.83"></a>
-<span class="sourceLineNo">084</span>  volatile CellSkipListSet snapshot;<a name="line.84"></a>
-<span class="sourceLineNo">085</span><a name="line.85"></a>
-<span class="sourceLineNo">086</span>  final CellComparator comparator;<a name="line.86"></a>
-<span class="sourceLineNo">087</span><a name="line.87"></a>
-<span class="sourceLineNo">088</span>  // Used to track own heapSize<a name="line.88"></a>
-<span class="sourceLineNo">089</span>  final AtomicLong size;<a name="line.89"></a>
-<span class="sourceLineNo">090</span>  private volatile long snapshotSize;<a name="line.90"></a>
-<span class="sourceLineNo">091</span><a name="line.91"></a>
-<span class="sourceLineNo">092</span>  // Used to track when to flush<a name="line.92"></a>
-<span class="sourceLineNo">093</span>  volatile long timeOfOldestEdit = Long.MAX_VALUE;<a name="line.93"></a>
-<span class="sourceLineNo">094</span><a name="line.94"></a>
-<span class="sourceLineNo">095</span>  TimeRangeTracker timeRangeTracker;<a name="line.95"></a>
-<span class="sourceLineNo">096</span>  TimeRangeTracker snapshotTimeRangeTracker;<a name="line.96"></a>
-<span class="sourceLineNo">097</span><a name="line.97"></a>
-<span class="sourceLineNo">098</span>  volatile MemStoreLAB allocator;<a name="line.98"></a>
-<span class="sourceLineNo">099</span>  volatile MemStoreLAB snapshotAllocator;<a name="line.99"></a>
-<span class="sourceLineNo">100</span>  volatile long snapshotId;<a name="line.100"></a>
-<span class="sourceLineNo">101</span>  volatile boolean tagsPresent;<a name="line.101"></a>
-<span class="sourceLineNo">102</span><a name="line.102"></a>
-<span class="sourceLineNo">103</span>  /**<a name="line.103"></a>
-<span class="sourceLineNo">104</span>   * Default constructor. Used for tests.<a name="line.104"></a>
-<span class="sourceLineNo">105</span>   */<a name="line.105"></a>
-<span class="sourceLineNo">106</span>  public DefaultMemStore() {<a name="line.106"></a>
-<span class="sourceLineNo">107</span>    this(HBaseConfiguration.create(), CellComparator.COMPARATOR);<a name="line.107"></a>
-<span class="sourceLineNo">108</span>  }<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>   * Constructor.<a name="line.111"></a>
-<span class="sourceLineNo">112</span>   * @param c Comparator<a name="line.112"></a>
-<span class="sourceLineNo">113</span>   */<a name="line.113"></a>
-<span class="sourceLineNo">114</span>  public DefaultMemStore(final Configuration conf,<a name="line.114"></a>
-<span class="sourceLineNo">115</span>                  final CellComparator c) {<a name="line.115"></a>
-<span class="sourceLineNo">116</span>    this.conf = conf;<a name="line.116"></a>
-<span class="sourceLineNo">117</span>    this.comparator = c;<a name="line.117"></a>
-<span class="sourceLineNo">118</span>    this.cellSet = new CellSkipListSet(c);<a name="line.118"></a>
-<span class="sourceLineNo">119</span>    this.snapshot = new CellSkipListSet(c);<a name="line.119"></a>
-<span class="sourceLineNo">120</span>    timeRangeTracker = new TimeRangeTracker();<a name="line.120"></a>
-<span class="sourceLineNo">121</span>    snapshotTimeRangeTracker = new TimeRangeTracker();<a name="line.121"></a>
-<span class="sourceLineNo">122</span>    this.size = new AtomicLong(DEEP_OVERHEAD);<a name="line.122"></a>
-<span class="sourceLineNo">123</span>    this.snapshotSize = 0;<a name="line.123"></a>
-<span class="sourceLineNo">124</span>    if (conf.getBoolean(USEMSLAB_KEY, USEMSLAB_DEFAULT)) {<a name="line.124"></a>
-<span class="sourceLineNo">125</span>      String className = conf.get(MSLAB_CLASS_NAME, HeapMemStoreLAB.class.getName());<a name="line.125"></a>
-<span class="sourceLineNo">126</span>      this.allocator = ReflectionUtils.instantiateWithCustomCtor(className,<a name="line.126"></a>
-<span class="sourceLineNo">127</span>          new Class[] { Configuration.class }, new Object[] { conf });<a name="line.127"></a>
-<span class="sourceLineNo">128</span>    } else {<a name="line.128"></a>
-<span class="sourceLineNo">129</span>      this.allocator = null;<a name="line.129"></a>
-<span class="sourceLineNo">130</span>    }<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>  void dump() {<a name="line.133"></a>
-<span class="sourceLineNo">134</span>    for (Cell cell: this.cellSet) {<a name="line.134"></a>
-<span class="sourceLineNo">135</span>      LOG.info(cell);<a name="line.135"></a>
-<span class="sourceLineNo">136</span>    }<a name="line.136"></a>
-<span class="sourceLineNo">137</span>    for (Cell cell: this.snapshot) {<a name="line.137"></a>
-<span class="sourceLineNo">138</span>      LOG.info(cell);<a name="line.138"></a>
-<span class="sourceLineNo">139</span>    }<a name="line.139"></a>
-<span class="sourceLineNo">140</span>  }<a name="line.140"></a>
-<span class="sourceLineNo">141</span><a name="line.141"></a>
-<span class="sourceLineNo">142</span>  /**<a name="line.142"></a>
-<span class="sourceLineNo">143</span>   * Creates a snapshot of the current memstore.<a name="line.143"></a>
-<span class="sourceLineNo">144</span>   * Snapshot must be cleared by call to {@link #clearSnapshot(long)}<a name="line.144"></a>
-<span class="sourceLineNo">145</span>   */<a name="line.145"></a>
-<span class="sourceLineNo">146</span>  @Override<a name="line.146"></a>
-<span class="sourceLineNo">147</span>  public MemStoreSnapshot snapshot() {<a name="line.147"></a>
-<span class="sourceLineNo">148</span>    // If snapshot currently has entries, then flusher failed or didn't call<a name="line.148"></a>
-<span class="sourceLineNo">149</span>    // cleanup.  Log a warning.<a name="line.149"></a>
-<span class="sourceLineNo">150</span>    if (!this.snapshot.isEmpty()) {<a name="line.150"></a>
-<span class="sourceLineNo">151</span>      LOG.warn("Snapshot called again without clearing previous. " +<a name="line.151"></a>
-<span class="sourceLineNo">152</span>          "Doing nothing. Another ongoing flush or did we fail last attempt?");<a name="line.152"></a>
-<span class="sourceLineNo">153</span>    } else {<a name="line.153"></a>
-<span class="sourceLineNo">154</span>      this.snapshotId = EnvironmentEdgeManager.currentTime();<a name="line.154"></a>
-<span class="sourceLineNo">155</span>      this.snapshotSize = keySize();<a name="line.155"></a>
-<span class="sourceLineNo">156</span>      if (!this.cellSet.isEmpty()) {<a name="line.156"></a>
-<span class="sourceLineNo">157</span>        this.snapshot = this.cellSet;<a name="line.157"></a>
-<span class="sourceLineNo">158</span>        this.cellSet = new CellSkipListSet(this.comparator);<a name="line.158"></a>
-<span class="sourceLineNo">159</span>        this.snapshotTimeRangeTracker = this.timeRangeTracker;<a name="line.159"></a>
-<span class="sourceLineNo">160</span>        this.timeRangeTracker = new TimeRangeTracker();<a name="line.160"></a>
-<span class="sourceLineNo">161</span>        // Reset heap to not include any keys<a name="line.161"></a>
-<span class="sourceLineNo">162</span>        this.size.set(DEEP_OVERHEAD);<a name="line.162"></a>
-<span class="sourceLineNo">163</span>        this.snapshotAllocator = this.allocator;<a name="line.163"></a>
-<span class="sourceLineNo">164</span>        // Reset allocator so we get a fresh buffer for the new memstore<a name="line.164"></a>
-<span class="sourceLineNo">165</span>        if (allocator != null) {<a name="line.165"></a>
-<span class="sourceLineNo">166</span>          String className = conf.get(MSLAB_CLASS_NAME, HeapMemStoreLAB.class.getName());<a name="line.166"></a>
-<span class="sourceLineNo">167</span>          this.allocator = ReflectionUtils.instantiateWithCustomCtor(className,<a name="line.167"></a>
-<span class="sourceLineNo">168</span>              new Class[] { Configuration.class }, new Object[] { conf });<a name="line.168"></a>
-<span class="sourceLineNo">169</span>        }<a name="line.169"></a>
-<span class="sourceLineNo">170</span>        timeOfOldestEdit = Long.MAX_VALUE;<a name="line.170"></a>
-<span class="sourceLineNo">171</span>      }<a name="line.171"></a>
-<span class="sourceLineNo">172</span>    }<a name="line.172"></a>
-<span class="sourceLineNo">173</span>    MemStoreSnapshot memStoreSnapshot = new MemStoreSnapshot(this.snapshotId, snapshot.size(), this.snapshotSize,<a name="line.173"></a>
-<span class="sourceLineNo">174</span>        this.snapshotTimeRangeTracker, new CollectionBackedScanner(snapshot, this.comparator),<a name="line.174"></a>
-<span class="sourceLineNo">175</span>        this.tagsPresent);<a name="line.175"></a>
-<span class="sourceLineNo">176</span>    this.tagsPresent = false;<a name="line.176"></a>
-<span class="sourceLineNo">177</span>    return memStoreSnapshot;<a name="line.177"></a>
-<span class="sourceLineNo">178</span>  }<a name="line.178"></a>
-<span class="sourceLineNo">179</span><a name="line.179"></a>
-<span class="sourceLineNo">180</span>  /**<a name="line.180"></a>
-<span class="sourceLineNo">181</span>   * The passed snapshot was successfully persisted; it can be let go.<a name="line.181"></a>
-<span class="sourceLineNo">182</span>   * @param id Id of the snapshot to clean out.<a name="line.182"></a>
-<span class="sourceLineNo">183</span>   * @throws UnexpectedStateException<a name="line.183"></a>
-<span class="sourceLineNo">184</span>   * @see #snapshot()<a name="line.184"></a>
-<span class="sourceLineNo">185</span>   */<a name="line.185"></a>
-<span class="sourceLineNo">186</span>  @Override<a name="line.186"></a>
-<span class="sourceLineNo">187</span>  public void clearSnapshot(long id) throws UnexpectedStateException {<a name="line.187"></a>
-<span class="sourceLineNo">188</span>    MemStoreLAB tmpAllocator = null;<a name="line.188"></a>
-<span class="sourceLineNo">189</span>    if (this.snapshotId != id) {<a name="line.189"></a>
-<span class="sourceLineNo">190</span>      throw new UnexpectedStateException("Current snapshot id is " + this.snapshotId + ",passed "<a name="line.190"></a>
-<span class="sourceLineNo">191</span>          + id);<a name="line.191"></a>
-<span class="sourceLineNo">192</span>    }<a name="line.192"></a>
-<span class="sourceLineNo">193</span>    // OK. Passed in snapshot is same as current snapshot. If not-empty,<a name="line.193"></a>
-<span class="sourceLineNo">194</span>    // create a new snapshot and let the old one go.<a name="line.194"></a>
-<span class="sourceLineNo">195</span>    if (!this.snapshot.isEmpty()) {<a name="line.195"></a>
-<span class="sourceLineNo">196</span>      this.snapshot = new CellSkipListSet(this.comparator);<a name="line.196"></a>
-<span class="sourceLineNo">197</span>      this.snapshotTimeRangeTracker = new TimeRangeTracker();<a name="line.197"></a>
-<span class="sourceLineNo">198</span>    }<a name="line.198"></a>
-<span class="sourceLineNo">199</span>    this.snapshotSize = 0;<a name="line.199"></a>
-<span class="sourceLineNo">200</span>    this.snapshotId = -1;<a name="line.200"></a>
-<span class="sourceLineNo">201</span>    if (this.snapshotAllocator != null) {<a name="line.201"></a>
-<span class="sourceLineNo">202</span>      tmpAllocator = this.snapshotAllocator;<a name="line.202"></a>
-<span class="sourceLineNo">203</span>      this.snapshotAllocator = null;<a name="line.203"></a>
-<span class="sourceLineNo">204</span>    }<a name="line.204"></a>
-<span class="sourceLineNo">205</span>    if (tmpAllocator != null) {<a name="line.205"></a>
-<span class="sourceLineNo">206</span>      tmpAllocator.close();<a name="line.206"></a>
-<span class="sourceLineNo">207</span>    }<a name="line.207"></a>
-<span class="sourceLineNo">208</span>  }<a name="line.208"></a>
-<span class="sourceLineNo">209</span><a name="line.209"></a>
-<span class="sourceLineNo">210</span>  @Override<a name="line.210"></a>
-<span class="sourceLineNo">211</span>  public long getFlushableSize() {<a name="line.211"></a>
-<span class="sourceLineNo">212</span>    return this.snapshotSize &gt; 0 ? this.snapshotSize : keySize();<a name="line.212"></a>
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-<span class="sourceLineNo">214</span><a name="line.214"></a>
-<span class="sourceLineNo">215</span>  @Override<a name="line.215"></a>
-<span class="sourceLineNo">216</span>  public long getSnapshotSize() {<a name="line.216"></a>
-<span class="sourceLineNo">217</span>    return this.snapshotSize;<a name="line.217"></a>
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-<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>   * Write an update<a name="line.221"></a>
-<span class="sourceLineNo">222</span>   * @param cell<a name="line.222"></a>
-<span class="sourceLineNo">223</span>   * @return approximate size of the passed Cell.<a name="line.223"></a>
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-<span class="sourceLineNo">225</span>  @Override<a name="line.225"></a>
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-<span class="sourceLineNo">228</span>    return internalAdd(toAdd);<a name="line.228"></a>
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-<span class="sourceLineNo">231</span>  @Override<a name="line.231"></a>
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-<span class="sourceLineNo">238</span>    // In no tags case this NoTagsKeyValue.getTagsLength() is a cheap call.<a name="line.238"></a>
-<span class="sourceLineNo">239</span>    // When we use ACL CP or Visibility CP which deals with Tags during<a name="line.239"></a>
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-<span class="sourceLineNo">262</span>   * Internal version of add() that doesn't clone Cells with the<a name="line.262"></a>
-<span class="sourceLineNo">263</span>   * allocator, and doesn't take the lock.<a name="line.263"></a>
-<span class="sourceLineNo">264</span>   *<a name="line.264"></a>
-<span class="sourceLineNo">265</span>   * Callers should ensure they already have the read lock taken<a name="line.265"></a>
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-<span class="sourceLineNo">552</span>   * Check if this memstore may contain the required keys<a name="line.552"></a>
-<span class="sourceLineNo">553</span>   * @param scan<a name="line.553"></a>
-<span class="sourceLineNo">554</span>   * @return False if the key definitely does not exist in this Memstore<a name="line.554"></a>
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-<span class="sourceLineNo">558</span>        snapshotTimeRangeTracker.includesTimeRange(scan.getTimeRange()))<a name="line.558"></a>
-<span class="sourceLineNo">559</span>        &amp;&amp; (Math.max(timeRangeTracker.getMaximumTimestamp(),<a name="line.559"></a>
-<span class="sourceLineNo">560</span>                     snapshotTimeRangeTracker.getMaximumTimestamp()) &gt;=<a name="line.560"></a>
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-<span class="sourceLineNo">574</span><a name="line.574"></a>
-<span class="sourceLineNo">575</span>    // last iterated Cells for cellSet and snapshot (to restore iterator state after reseek)<a name="line.575"></a>
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-<span class="sourceLineNo">578</span>    <a name="line.578"></a>
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-<span class="sourceLineNo">581</span>    private Iterator&lt;Cell&gt; snapshotIt;<a name="line.581"></a>
+<span class="sourceLineNo">043</span>import org.apache.hadoop.hbase.io.TimeRange;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.util.ByteRange;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.util.ClassSize;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.util.CollectionBackedScanner;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import org.apache.hadoop.hbase.util.ReflectionUtils;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import org.apache.htrace.Trace;<a name="line.50"></a>
+<span class="sourceLineNo">051</span><a name="line.51"></a>
+<span class="sourceLineNo">052</span>/**<a name="line.52"></a>
+<span class="sourceLineNo">053</span> * The MemStore holds in-memory modifications to the Store.  Modifications<a name="line.53"></a>
+<span class="sourceLineNo">054</span> * are {@link Cell}s.  When asked to flush, current memstore is moved<a name="line.54"></a>
+<span class="sourceLineNo">055</span> * to snapshot and is cleared.  We continue to serve edits out of new memstore<a name="line.55"></a>
+<span class="sourceLineNo">056</span> * and backing snapshot until flusher reports in that the flush succeeded. At<a name="line.56"></a>
+<span class="sourceLineNo">057</span> * this point we let the snapshot go.<a name="line.57"></a>
+<span class="sourceLineNo">058</span> *  &lt;p&gt;<a name="line.58"></a>
+<span class="sourceLineNo">059</span> * The MemStore functions should not be called in parallel. Callers should hold<a name="line.59"></a>
+<span class="sourceLineNo">060</span> *  write and read locks. This is done in {@link HStore}.<a name="line.60"></a>
+<span class="sourceLineNo">061</span> *  &lt;/p&gt;<a name="line.61"></a>
+<span class="sourceLineNo">062</span> *<a name="line.62"></a>
+<span class="sourceLineNo">063</span> * TODO: Adjust size of the memstore when we remove items because they have<a name="line.63"></a>
+<span class="sourceLineNo">064</span> * been deleted.<a name="line.64"></a>
+<span class="sourceLineNo">065</span> * TODO: With new KVSLS, need to make sure we update HeapSize with difference<a name="line.65"></a>
+<span class="sourceLineNo">066</span> * in KV size.<a name="line.66"></a>
+<span class="sourceLineNo">067</span> */<a name="line.67"></a>
+<span class="sourceLineNo">068</span>@InterfaceAudience.Private<a name="line.68"></a>
+<span class="sourceLineNo">069</span>public class DefaultMemStore implements MemStore {<a name="line.69"></a>
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+<span class="sourceLineNo">074</span><a name="line.74"></a>
+<span class="sourceLineNo">075</span>  private Configuration conf;<a name="line.75"></a>
+<span class="sourceLineNo">076</span><a name="line.76"></a>
+<span class="sourceLineNo">077</span>  // MemStore.  Use a CellSkipListSet rather than SkipListSet because of the<a name="line.77"></a>
+<span class="sourceLineNo">078</span>  // better semantics.  The Map will overwrite if passed a key it already had<a name="line.78"></a>
+<span class="sourceLineNo">079</span>  // whereas the Set will not add new Cell if key is same though value might be<a name="line.79"></a>
+<span class="sourceLineNo">080</span>  // different.  Value is not important -- just make sure always same<a name="line.80"></a>
+<span class="sourceLineNo">081</span>  // reference passed.<a name="line.81"></a>
+<span class="sourceLineNo">082</span>  volatile CellSkipListSet cellSet;<a name="line.82"></a>
+<span class="sourceLineNo">083</span><a name="line.83"></a>
+<span class="sourceLineNo">084</span>  // Snapshot of memstore.  Made for flusher.<a name="line.84"></a>
+<span class="sourceLineNo">085</span>  volatile CellSkipListSet snapshot;<a name="line.85"></a>
+<span class="sourceLineNo">086</span><a name="line.86"></a>
+<span class="sourceLineNo">087</span>  final CellComparator comparator;<a name="line.87"></a>
+<span class="sourceLineNo">088</span><a name="line.88"></a>
+<span class="sourceLineNo">089</span>  // Used to track own heapSize<a name="line.89"></a>
+<span class="sourceLineNo">090</span>  final AtomicLong size;<a name="line.90"></a>
+<span class="sourceLineNo">091</span>  private volatile long snapshotSize;<a name="line.91"></a>
+<span class="sourceLineNo">092</span><a name="line.92"></a>
+<span class="sourceLineNo">093</span>  // Used to track when to flush<a name="line.93"></a>
+<span class="sourceLineNo">094</span>  volatile long timeOfOldestEdit = Long.MAX_VALUE;<a name="line.94"></a>
+<span class="sourceLineNo">095</span><a name="line.95"></a>
+<span class="sourceLineNo">096</span>  TimeRangeTracker timeRangeTracker;<a name="line.96"></a>
+<span class="sourceLineNo">097</span>  TimeRangeTracker snapshotTimeRangeTracker;<a name="line.97"></a>
+<span class="sourceLineNo">098</span><a name="line.98"></a>
+<span class="sourceLineNo">099</span>  volatile MemStoreLAB allocator;<a name="line.99"></a>
+<span class="sourceLineNo">100</span>  volatile MemStoreLAB snapshotAllocator;<a name="line.100"></a>
+<span class="sourceLineNo">101</span>  volatile long snapshotId;<a name="line.101"></a>
+<span class="sourceLineNo">102</span>  volatile boolean tagsPresent;<a name="line.102"></a>
+<span class="sourceLineNo">103</span><a name="line.103"></a>
+<span class="sourceLineNo">104</span>  /**<a name="line.104"></a>
+<span class="sourceLineNo">105</span>   * Default constructor. Used for tests.<a name="line.105"></a>
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+<span class="sourceLineNo">108</span>    this(HBaseConfiguration.create(), CellComparator.COMPARATOR);<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>   * Constructor.<a name="line.112"></a>
+<span class="sourceLineNo">113</span>   * @param c Comparator<a name="line.113"></a>
+<span class="sourceLineNo">114</span>   */<a name="line.114"></a>
+<span class="sourceLineNo">115</span>  public DefaultMemStore(final Configuration conf,<a name="line.115"></a>
+<span class="sourceLineNo">116</span>                  final CellComparator c) {<a name="line.116"></a>
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+<span class="sourceLineNo">119</span>    this.cellSet = new CellSkipListSet(c);<a name="line.119"></a>
+<span class="sourceLineNo">120</span>    this.snapshot = new CellSkipListSet(c);<a name="line.120"></a>
+<span class="sourceLineNo">121</span>    timeRangeTracker = new TimeRangeTracker();<a name="line.121"></a>
+<span class="sourceLineNo">122</span>    snapshotTimeRangeTracker = new TimeRangeTracker();<a name="line.122"></a>
+<span class="sourceLineNo">123</span>    this.size = new AtomicLong(DEEP_OVERHEAD);<a name="line.123"></a>
+<span class="sourceLineNo">124</span>    this.snapshotSize = 0;<a name="line.124"></a>
+<span class="sourceLineNo">125</span>    if (conf.getBoolean(USEMSLAB_KEY, USEMSLAB_DEFAULT)) {<a name="line.125"></a>
+<span class="sourceLineNo">126</span>      String className = conf.get(MSLAB_CLASS_NAME, HeapMemStoreLAB.class.getName());<a name="line.126"></a>
+<span class="sourceLineNo">127</span>      this.allocator = ReflectionUtils.instantiateWithCustomCtor(className,<a name="line.127"></a>
+<span class="sourceLineNo">128</span>          new Class[] { Configuration.class }, new Object[] { conf });<a name="line.128"></a>
+<span class="sourceLineNo">129</span>    } else {<a name="line.129"></a>
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+<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><a name="line.133"></a>
+<span class="sourceLineNo">134</span>  void dump() {<a name="line.134"></a>
+<span class="sourceLineNo">135</span>    for (Cell cell: this.cellSet) {<a name="line.135"></a>
+<span class="sourceLineNo">136</span>      LOG.info(cell);<a name="line.136"></a>
+<span class="sourceLineNo">137</span>    }<a name="line.137"></a>
+<span class="sourceLineNo">138</span>    for (Cell cell: this.snapshot) {<a name="line.138"></a>
+<span class="sourceLineNo">139</span>      LOG.info(cell);<a name="line.139"></a>
+<span class="sourceLineNo">140</span>    }<a name="line.140"></a>
+<span class="sourceLineNo">141</span>  }<a name="line.141"></a>
+<span class="sourceLineNo">142</span><a name="line.142"></a>
+<span class="sourceLineNo">143</span>  /**<a name="line.143"></a>
+<span class="sourceLineNo">144</span>   * Creates a snapshot of the current memstore.<a name="line.144"></a>
+<span class="sourceLineNo">145</span>   * Snapshot must be cleared by call to {@link #clearSnapshot(long)}<a name="line.145"></a>
+<span class="sourceLineNo">146</span>   */<a name="line.146"></a>
+<span class="sourceLineNo">147</span>  @Override<a name="line.147"></a>
+<span class="sourceLineNo">148</span>  public MemStoreSnapshot snapshot() {<a name="line.148"></a>
+<span class="sourceLineNo">149</span>    // If snapshot currently has entries, then flusher failed or didn't call<a name="line.149"></a>
+<span class="sourceLineNo">150</span>    // cleanup.  Log a warning.<a name="line.150"></a>
+<span class="sourceLineNo">151</span>    if (!this.snapshot.isEmpty()) {<a name="line.151"></a>
+<span class="sourceLineNo">152</span>      LOG.warn("Snapshot called again without clearing previous. " +<a name="line.152"></a>
+<span class="sourceLineNo">153</span>          "Doing nothing. Another ongoing flush or did we fail last attempt?");<a name="line.153"></a>
+<span class="sourceLineNo">154</span>    } else {<a name="line.154"></a>
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+<span class="sourceLineNo">156</span>      this.snapshotSize = keySize();<a name="line.156"></a>
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+<span class="sourceLineNo">161</span>        this.timeRangeTracker = new TimeRangeTracker();<a name="line.161"></a>
+<span class="sourceLineNo">162</span>        // Reset heap to not include any keys<a name="line.162"></a>
+<span class="sourceLineNo">163</span>        this.size.set(DEEP_OVERHEAD);<a name="line.163"></a>
+<span class="sourceLineNo">164</span>        this.snapshotAllocator = this.allocator;<a name="line.164"></a>
+<span class="sourceLineNo">165</span>        // Reset allocator so we get a fresh buffer for the new memstore<a name="line.165"></a>
+<span class="sourceLineNo">166</span>        if (allocator != null) {<a name="line.166"></a>
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+<span class="sourceLineNo">180</span><a name="line.180"></a>
+<span class="sourceLineNo">181</span>  /**<a name="line.181"></a>
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+<span class="sourceLineNo">186</span>   */<a name="line.186"></a>
+<span class="sourceLineNo">187</span>  @Override<a name="line.187"></a>
+<span class="sourceLineNo">188</span>  public void clearSnapshot(long id) throws UnexpectedStateException {<a name="line.188"></a>
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+<span class="sourceLineNo">192</span>          + id);<a name="line.192"></a>
+<span class="sourceLineNo">193</span>    }<a name="line.193"></a>
+<span class="sourceLineNo">194</span>    // OK. Passed in snapshot is same as current snapshot. If not-empty,<a name="line.194"></a>
+<span class="sourceLineNo">195</span>    // create a new snapshot and let the old one go.<a name="line.195"></a>
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+<span class="sourceLineNo">199</span>    }<a name="line.199"></a>
+<span class="sourceLineNo">200</span>    this.snapshotSize = 0;<a name="line.200"></a>
+<span class="sourceLineNo">201</span>    this.snapshotId = -1;<a name="line.201"></a>
+<span class="sourceLineNo">202</span>    if (this.snapshotAllocator != null) {<a name="line.202"></a>
+<span class="sourceLineNo">203</span>      tmpAllocator = this.snapshotAllocator;<a name="line.203"></a>
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+<span class="sourceLineNo">210</span><a name="line.210"></a>
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+<span class="sourceLineNo">212</span>  public long getFlushableSize() {<a name="line.212"></a>
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+<span class="sourceLineNo">215</span><a name="line.215"></a>
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+<span class="sourceLineNo">220</span><a name="line.220"></a>
+<span class="sourceLineNo">221</span>  /**<a name="line.221"></a>
+<span class="sourceLineNo">222</span>   * Write an update<a name="line.222"></a>
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+<span class="sourceLineNo">226</span>  @Override<a name="line.226"></a>
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+<span class="sourceLineNo">229</span>    return internalAdd(toAdd);<a name="line.229"></a>
+<span class="sourceLineNo">230</span>  }<a name="line.230"></a>
+<span class="sourceLineNo">231</span><a name="line.231"></a>
+<span class="sourceLineNo">232</span>  @Override<a name="line.232"></a>
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+<span class="sourceLineNo">236</span><a name="line.236"></a>
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+<span class="sourceLineNo">239</span>    // In no tags case this NoTagsKeyValue.getTagsLength() is a cheap call.<a name="line.239"></a>
+<span class="sourceLineNo">240</span>    // When we use ACL CP or Visibility CP which deals with Tags during<a name="line.240"></a>
+<span class="sourceLineNo">241</span>    // mutation, the TagRewriteCell.getTagsLength() is a cheaper call. We do not<a name="line.241"></a>
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+<span class="sourceLineNo">249</span><a name="line.249"></a>
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+<span class="sourceLineNo">252</span>    setOldestEditTimeToNow();<a name="line.252"></a>
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+<span class="sourceLineNo">254</span>  }<a name="line.254"></a>
+<span class="sourceLineNo">255</span><a name="line.255"></a>
+<span class="sourceLineNo">256</span>  void setOldestEditTimeToNow() {<a name="line.256"></a>
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+<span class="sourceLineNo">258</span>      timeOfOldestEdit = EnvironmentEdgeManager.currentTime();<a name="line.258"></a>
+<span class="sourceLineNo">259</span>    }<a name="line.259"></a>
+<span class="sourceLineNo">260</span>  }<a name="line.260"></a>
+<span class="sourceLineNo">261</span><a name="line.261"></a>
+<span class="sourceLineNo">262</span>  /**<a name="line.262"></a>
+<span class="sourceLineNo">263</span>   * Internal version of add() that doesn't clone Cells with the<a name="line.263"></a>
+<span class="sourceLineNo">264</span>   * allocator, and doesn't take the lock.<a name="line.264"></a>
+<span class="sourceLineNo">265</span>   *<a name="line.265"></a>
+<span class="sourceLineNo">266</span>   * Callers should ensure they already have the read lock taken<a name="line.266"></a>
+<span class="sourceLineNo">267</span>   */<a name="line.267"></a>
+<span class="sourceLineNo">268</span>  private long internalAdd(final Cell toAdd) {<a name="line.268"></a>
+<span class="sourceLineNo">269</span>    long s = heapSizeChange(toAdd, addToCellSet(toAdd));<a name="line.269"></a>
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+<span class="sourceLineNo">273</span>  }<a name="line.273"></a>
+<span class="sourceLineNo">274</span><a name="line.274"></a>
+<span class="sourceLineNo">275</span>  private Cell maybeCloneWithAllocator(Cell cell) {<a name="line.275"></a>
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+<span class="sourceLineNo">278</span>    }<a name="line.278"></a>
+<span class="sourceLineNo">279</span><a name="line.279"></a>
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+<span class="sourceLineNo">281</span>    ByteRange alloc = allocator.allocateBytes(len);<a name="line.281"></a>
+<span class="sourceLineNo">282</span>    if (alloc == null) {<a name="line.282"></a>
+<span class="sourceLineNo">283</span>      // The allocation was too large, allocator decided<a name="line.283"></a>
+<span class="sourceLineNo">284</span>      // not to do anything with it.<a name="line.284"></a>
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+<span class="sourceLineNo">286</span>    }<a name="line.286"></a>
+<span class="sourceLineNo">287</span>    assert alloc.getBytes() != null;<a name="line.287"></a>
+<span class="sourceLineNo">288</span>    KeyValueUtil.appendToByteArray(cell, alloc.getBytes(), alloc.getOffset());<a name="line.288"></a>
+<span class="sourceLineNo">289</span>    KeyValue newKv = new KeyValue(alloc.getBytes(), alloc.getOffset(), len);<a name="line.289"></a>
+<span class="sourceLineNo">290</span>    newKv.setSequenceId(cell.getSequenceId());<a name="line.290"></a>
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+<span class="sourceLineNo">293</span><a name="line.293"></a>
+<span class="sourceLineNo">294</span>  /**<a name="line.294"></a>
+<span class="sourceLineNo">295</span>   * Remove n key from the memstore. Only cells that have the same key and the<a name="line.295"></a>
+<span class="sourceLineNo">296</span>   * same memstoreTS are removed.  It is ok to not update timeRangeTracker<a name="line.296"></a>
+<span class="sourceLineNo">297</span>   * in this call. It is possible that we can optimize this method by using<a name="line.297"></a>
+<span class="sourceLineNo">298</span>   * tailMap/iterator, but since this method is called rarely (only for<a name="line.298"></a>
+<span class="sourceLineNo">299</span>   * error recovery), we can leave those optimization for the future.<a name="line.299"></a>
+<span class="sourceLineNo">300</span>   * @param cell<a name="line.300"></a>
+<span class="sourceLineNo">301</span>   */<a name="line.301"></a>
+<span class="sourceLineNo">302</span>  @Override<a name="line.302"></a>
+<span class="sourceLineNo">303</span>  public void rollback(Cell cell) {<a name="line.303"></a>
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+<span class="sourceLineNo">305</span>    // this.size, because that tracks the size of only the memstore and<a name="line.305"></a>
+<span class="sourceLineNo">306</span>    // not the snapshot. The flush of this snapshot to disk has not<a name="line.306"></a>
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+<span class="sourceLineNo">308</span>    // commit before starting the flush to disk.<a name="line.308"></a>
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+<span class="sourceLineNo">314</span>    }<a name="line.314"></a>
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+<span class="sourceLineNo">323</span><a name="line.323"></a>
+<span class="sourceLineNo">324</span>  /**<a name="line.324"></a>
+<span class="sourceLineNo">325</span>   * Write a delete<a name="line.325"></a>
+<span class="sourceLineNo">326</span>   * @param deleteCell<a name="line.326"></a>
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+<span class="sourceLineNo">328</span>   */<a name="line.328"></a>
+<span class="sourceLineNo">329</span>  @Override<a name="line.329"></a>
+<span class="sourceLineNo">330</span>  public long delete(Cell deleteCell) {<a name="line.330"></a>
+<span class="sourceLineNo">331</span>    long s = 0;<a name="line.331"></a>
+<span class="sourceLineNo">332</span>    Cell toAdd = maybeCloneWithAllocator(deleteCell);<a name="line.332"></a>
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+<span class="sourceLineNo">334</span>    timeRangeTracker.includeTimestamp(toAdd);<a name="line.334"></a>
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+<span class="sourceLineNo">338</span><a name="line.338"></a>
+<span class="sourceLineNo">339</span>  /**<a name="line.339"></a>
+<span class="sourceLineNo">340</span>   * @param cell Find the row that comes after this one.  If null, we return the<a name="line.340"></a>
+<span class="sourceLineNo">341</span>   * first.<a name="line.341"></a>
+<span class="sourceLineNo">342</span>   * @return Next row or null if none found.<a name="line.342"></a>
+<span class="sourceLineNo">343</span>   */<a name="line.343"></a>
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+<span class="sourceLineNo">347</span><a name="line.347"></a>
+<span class="sourceLineNo">348</span>  /*<a name="line.348"></a>
+<span class="sourceLineNo">349</span>   * @param a<a name="line.349"></a>
+<span class="sourceLineNo">350</span>   * @param b<a name="line.350"></a>
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+<span class="sourceLineNo">352</span>   */<a name="line.352"></a>
+<span class="sourceLineNo">353</span>  private Cell getLowest(final Cell a, final Cell b) {<a name="line.353"></a>
+<span class="sourceLineNo">354</span>    if (a == null) {<a name="line.354"></a>
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+<span class="sourceLineNo">356</span>    }<a name="line.356"></a>
+<span class="sourceLineNo">357</span>    if (b == null) {<a name="line.357"></a>
+<span class="sourceLineNo">358</span>      return a;<a name="line.358"></a>
+<span class="sourceLineNo">359</span>    }<a name="line.359"></a>
+<span class="sourceLineNo">360</span>    return comparator.compareRows(a, b) &lt;= 0? a: b;<a name="line.360"></a>
+<span class="sourceLineNo">361</span>  }<a name="line.361"></a>
+<span class="sourceLineNo">362</span><a name="line.362"></a>
+<span class="sourceLineNo">363</span>  /*<a name="line.363"></a>
+<span class="sourceLineNo">364</span>   * @param key Find row that follows this one.  If null, return first.<a name="line.364"></a>
+<span class="sourceLineNo">365</span>   * @param map Set to look in for a row beyond &lt;code&gt;row&lt;/code&gt;.<a name="line.365"></a>
+<span class="sourceLineNo">366</span>   * @return Next row or null if none found.  If one found, will be a new<a name="line.366"></a>
+<span class="sourceLineNo">367</span>   * KeyValue -- can be destroyed by subsequent calls to this method.<a name="line.367"></a>
+<span class="sourceLineNo">368</span>   */<a name="line.368"></a>
+<span class="sourceLineNo">369</span>  private Cell getNextRow(final Cell key,<a name="line.369"></a>
+<span class="sourceLineNo">370</span>      final NavigableSet&lt;Cell&gt; set) {<a name="line.370"></a>
+<span class="sourceLineNo">371</span>    Cell result = null;<a name="line.371"></a>
+<span class="sourceLineNo">372</span>    SortedSet&lt;Cell&gt; tail = key == null? set: set.tailSet(key);<a name="line.372"></a>
+<span class="sourceLineNo">373</span>    // Iterate until we fall into the next row; i.e. move off current row<a name="line.373"></a>
+<span class="sourceLineNo">374</span>    for (Cell cell: tail) {<a name="line.374"></a>
+<span class="sourceLineNo">375</span>      if (comparator.compareRows(cell, key) &lt;= 0)<a name="line.375"></a>
+<span class="sourceLineNo">376</span>        continue;<a name="line.376"></a>
+<span class="sourceLineNo">377</span>      // Note: Not suppressing deletes or expired cells.  Needs to be handled<a name="line.377"></a>
+<span class="sourceLineNo">378</span>      // by higher up functions.<a name="line.378"></a>
+<span class="sourceLineNo">379</span>      result = cell;<a name="line.379"></a>
+<span class="sourceLineNo">380</span>      break;<a name="line.380"></a>
+<span class="sourceLineNo">381</span>    }<a name="line.381"></a>
+<span class="sourceLineNo">382</span>    return result;<a name="line.382"></a>
+<span class="sourceLineNo">383</span>  }<a name="line.383"></a>
+<span class="sourceLineNo">384</span><a name="line.384"></a>
+<span class="sourceLineNo">385</span>  /**<a name="line.385"></a>
+<span class="sourceLineNo">386</span>   * Only used by tests. TODO: Remove<a name="line.386"></a>
+<span class="sourceLineNo">387</span>   *<a name="line.387"></a>
+<span class="sourceLineNo">388</span>   * Given the specs of a column, update it, first by inserting a new record,<a name="line.388"></a>
+<span class="sourceLineNo">389</span>   * then removing the old one.  Since there is only 1 KeyValue involved, the memstoreTS<a name="line.389"></a>
+<span class="sourceLineNo">390</span>   * will be set to 0, thus ensuring that they instantly appear to anyone. The underlying<a name="line.390"></a>
+<span class="sourceLineNo">391</span>   * store will ensure that the insert/delete each are atomic. A scanner/reader will either<a name="line.391"></a>
+<span class="sourceLineNo">392</span>   * get the new value, or the old value and all readers will eventually only see the new<a name="line.392"></a>
+<span class="sourceLineNo">393</span>   * value after the old was removed.<a name="line.393"></a>
+<span class="sourceLineNo">394</span>   *<a name="line.394"></a>
+<span class="sourceLineNo">395</span>   * @param row<a name="line.395"></a>
+<span class="sourceLineNo">396</span>   * @param family<a name="line.396"></a>
+<span class="sourceLineNo">397</span>   * @param qualifier<a name="line.397"></a>
+<span class="sourceLineNo">398</span>   * @param newValue<a name="line.398"></a>
+<span class="sourceLineNo">399</span>   * @param now<a name="line.399"></a>
+<span class="sourceLineNo">400</span>   * @return  Timestamp<a name="line.400"></a>
+<span class="sourceLineNo">401</span>   */<a name="line.401"></a>
+<span class="sourceLineNo">402</span>  @Override<a name="line.402"></a>
+<span class="sourceLineNo">403</span>  public long updateColumnValue(byte[] row,<a name="line.403"></a>
+<span class="sourceLineNo">404</span>                                byte[] family,<a name="line.404"></a>
+<span class="sourceLineNo">405</span>                                byte[] qualifier,<a name="line.405"></a>
+<span class="sourceLineNo">406</span>                                long newValue,<a name="line.406"></a>
+<span class="sourceLineNo">407</span>                                long now) {<a name="line.407"></a>
+<span class="sourceLineNo">408</span>    Cell firstCell = KeyValueUtil.createFirstOnRow(row, family, qualifier);<a name="line.408"></a>
+<span class="sourceLineNo">409</span>    // Is there a Cell in 'snapshot' with the same TS? If so, upgrade the timestamp a bit.<a name="line.409"></a>
+<span class="sourceLineNo">410</span>    SortedSet&lt;Cell&gt; snSs = snapshot.tailSet(firstCell);<a name="line.410"></a>
+<span class="sourceLineNo">411</span>    if (!snSs.isEmpty()) {<a name="line.411"></a>
+<span class="sourceLineNo">412</span>      Cell snc = snSs.first();<a name="line.412"></a>
+<span class="sourceLineNo">413</span>      // is there a matching Cell in the snapshot?<a name="line.413"></a>
+<span class="sourceLineNo">414</span>      if (CellUtil.matchingRow(snc, firstCell) &amp;&amp; CellUtil.matchingQualifier(snc, firstCell)) {<a name="line.414"></a>
+<span class="sourceLineNo">415</span>        if (snc.getTimestamp() == now) {<a name="line.415"></a>
+<span class="sourceLineNo">416</span>          // poop,<a name="line.416"></a>
+<span class="sourceLineNo">417</span>          now += 1;<a name="line.417"></a>
+<span class="sourceLineNo">418</span>        }<a name="line.418"></a>
+<span class="sourceLineNo">419</span>      }<a name="line.419"></a>
+<span class="sourceLineNo">420</span>    }<a name="line.420"></a>
+<span class="sourceLineNo">421</span><a name="line.421"></a>
+<span class="sourceLineNo">422</span>    // logic here: the new ts MUST be at least 'now'. But it could be larger if necessary.<a name="line.422"></a>
+<span class="sourceLineNo">423</span>    // But the timestamp should also be max(now, mostRecentTsInMemstore)<a name="line.423"></a>
+<

<TRUNCATED>

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