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| <div class="title">LogByteSizeMergePolicy.cs</div> </div> |
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| <div class="contents"> |
| <a href="../../d7/df6/_log_byte_size_merge_policy_8cs.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* </span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * contributor license agreements. See the NOTICE file distributed with</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * this work for additional information regarding copyright ownership.</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * The ASF licenses this file to You under the Apache License, Version 2.0</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * (the "License"); you may not use this file except in compliance with</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * the License. You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * See the License for the specific language governing permissions and</span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * limitations under the License.</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">using</span> System;</div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">namespace </span>Lucene.Net.Index</div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> {</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="comment"></span></div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> /// <summary>This is a <see cref="LogMergePolicy" /> that measures size of a</span></div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> /// segment as the total byte size of the segment's files. </span></div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00026"></a><span class="lineno"><a class="code" href="../../de/d2f/class_lucene_1_1_net_1_1_index_1_1_log_byte_size_merge_policy.html"> 26</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="../../de/d2f/class_lucene_1_1_net_1_1_index_1_1_log_byte_size_merge_policy.html" title="This is a LogMergePolicy that measures size of a segment as the total byte size of the segment's file...">LogByteSizeMergePolicy</a> : <a class="code" href="../../db/d3e/class_lucene_1_1_net_1_1_index_1_1_log_merge_policy.html" title="This class implements a MergePolicy that tries to merge segments into levels of exponentially increas...">LogMergePolicy</a></div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  {</div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="comment"></span></div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> /// <seealso cref="MinMergeMB"></span></div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00031"></a><span class="lineno"><a class="code" href="../../de/d2f/class_lucene_1_1_net_1_1_index_1_1_log_byte_size_merge_policy.html#a1c668a1ed85fff88509f2a9d2ce53f38"> 31</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">double</span> DEFAULT_MIN_MERGE_MB = 1.6;</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="comment"></span></div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> /// <summary>Default maximum segment size. A segment of this size</summary></span></div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> /// <seealso cref="MaxMergeMB"></span></div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> /// </seealso></span></div> |
| <div class="line"><a name="l00036"></a><span class="lineno"><a class="code" href="../../de/d2f/class_lucene_1_1_net_1_1_index_1_1_log_byte_size_merge_policy.html#a974ac0ef923650d1fce0f8d546b1b1de"> 36</a></span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">static</span> readonly <span class="keywordtype">long</span> DEFAULT_MAX_MERGE_MB = <span class="keywordtype">long</span>.MaxValue;</div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div> |
| <div class="line"><a name="l00038"></a><span class="lineno"><a class="code" href="../../de/d2f/class_lucene_1_1_net_1_1_index_1_1_log_byte_size_merge_policy.html#a082dd965e71128d42ff44cd440561b40"> 38</a></span>  <span class="keyword">public</span> <a class="code" href="../../de/d2f/class_lucene_1_1_net_1_1_index_1_1_log_byte_size_merge_policy.html" title="This is a LogMergePolicy that measures size of a segment as the total byte size of the segment's file...">LogByteSizeMergePolicy</a>(<a class="code" href="../../d2/d1d/class_lucene_1_1_net_1_1_index_1_1_index_writer.html" title="An IndexWriter creates and maintains an index. The create argument to the constructor determines whet...">IndexWriter</a> writer)</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  : base(writer)</div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  {</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  minMergeSize = (long) (DEFAULT_MIN_MERGE_MB * 1024 * 1024);</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="comment">//mgarski - the line below causes an overflow in .NET, resulting in a negative number...</span></div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="comment">//maxMergeSize = (long) (DEFAULT_MAX_MERGE_MB * 1024 * 1024);</span></div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  maxMergeSize = DEFAULT_MAX_MERGE_MB;</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  }</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">override</span> <span class="keywordtype">long</span> Size(<a class="code" href="../../d7/d6c/class_lucene_1_1_net_1_1_index_1_1_segment_info.html" title="Information about a segment such as it's name, directory, and files related to the segment...">SegmentInfo</a> info)</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  {</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">return</span> SizeBytes(info);</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  }</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div> |
| <div class="line"><a name="l00051"></a><span class="lineno"><a class="code" href="../../de/d2f/class_lucene_1_1_net_1_1_index_1_1_log_byte_size_merge_policy.html#aefcfb40495a9a9d341055d7f7296d686"> 51</a></span>  <span class="keyword">protected</span> <span class="keyword">override</span> <span class="keywordtype">void</span> Dispose(<span class="keywordtype">bool</span> disposing)</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  {</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="comment">// Do nothing.</span></div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  }</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> /// <summary><p/>Gets or sets the largest segment (measured by total</span></div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> /// byte size of the segment's files, in MB) that may be</span></div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> /// merged with other segments. Small values (e.g., less</span></div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> /// than 50 MB) are best for interactive indexing, as this</span></div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> /// limits the length of pauses while indexing to a few</span></div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> /// seconds. Larger values are best for batched indexing</span></div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> /// and speedier searches.<p/></span></div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> /// </span></div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> /// <p/>Note that <see cref="IndexWriter.MaxMergeDocs" /> is also</span></div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> /// used to check whether a segment is too large for</span></div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> /// merging (it's either or).<p/></span></div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">virtual</span> <span class="keywordtype">double</span> MaxMergeMB</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"><a class="code" href="../../de/d2f/class_lucene_1_1_net_1_1_index_1_1_log_byte_size_merge_policy.html#a2523b0db76b78b6f3430d141b7d98fa0"> 70</a></span>  {</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> maxMergeSize/1024d/1024d; }</div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keyword">set</span></div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  {</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="comment">//mgarski: java gracefully overflows to Int64.MaxValue, .NET to MinValue...</span></div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  maxMergeSize = (long) (value*1024*1024);</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">if</span> (maxMergeSize < 0)</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  {</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  maxMergeSize = DEFAULT_MAX_MERGE_MB;</div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  }</div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  }</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  }</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"></span></div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"> /// <summary>Gets or sets the minimum size for the lowest level segments.</span></div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> /// Any segments below this size are considered to be on</span></div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> /// the same level (even if they vary drastically in size)</span></div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> /// and will be merged whenever there are mergeFactor of</span></div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> /// them. This effectively truncates the "long tail" of</span></div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"> /// small segments that would otherwise be created into a</span></div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> /// single level. If you set this too large, it could</span></div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> /// greatly increase the merging cost during indexing (if</span></div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> /// you flush many small segments). </span></div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> /// </summary></span></div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"></span> <span class="keyword">public</span> <span class="keyword">virtual</span> <span class="keywordtype">double</span> MinMergeMB</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"><a class="code" href="../../de/d2f/class_lucene_1_1_net_1_1_index_1_1_log_byte_size_merge_policy.html#ae2103c6b6e95a8223baa991bc918559a"> 94</a></span>  {</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> ((<span class="keywordtype">double</span>) minMergeSize)/1024/1024; }</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">set</span> { minMergeSize = (long) (value*1024*1024); }</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  }</div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> }</div> |
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