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<div class="section" id="sstablemetadata">
<h1>sstablemetadata<a class="headerlink" href="#sstablemetadata" title="Permalink to this headline">¶</a></h1>
<p>Print information about an sstable from the related Statistics.db and Summary.db files to standard output.</p>
<p>ref: <a class="reference external" href="https://issues.apache.org/jira/browse/CASSANDRA-7159">https://issues.apache.org/jira/browse/CASSANDRA-7159</a> and <a class="reference external" href="https://issues.apache.org/jira/browse/CASSANDRA-10838">https://issues.apache.org/jira/browse/CASSANDRA-10838</a></p>
<p>Cassandra must be stopped before this tool is executed, or unexpected results will occur. Note: the script does not verify that Cassandra is stopped.</p>
<div class="section" id="usage">
<h2>Usage<a class="headerlink" href="#usage" title="Permalink to this headline">¶</a></h2>
<p>sstablemetadata &lt;options&gt; &lt;sstable filename(s)&gt;</p>
<table border="1" class="docutils">
<colgroup>
<col width="24%" />
<col width="76%" />
</colgroup>
<tbody valign="top">
<tr class="row-odd"><td>–gc_grace_seconds &lt;arg&gt;</td>
<td>The gc_grace_seconds to use when calculating droppable tombstones</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="print-all-the-metadata">
<h2>Print all the metadata<a class="headerlink" href="#print-all-the-metadata" title="Permalink to this headline">¶</a></h2>
<p>Run sstablemetadata against the <a href="#id1"><span class="problematic" id="id2">*</span></a>Data.db file(s) related to a table. If necessary, find the <a href="#id3"><span class="problematic" id="id4">*</span></a>Data.db file(s) using sstableutil.</p>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sstableutil</span> <span class="n">keyspace1</span> <span class="n">standard1</span> <span class="o">|</span> <span class="n">grep</span> <span class="n">Data</span>
<span class="o">/</span><span class="n">var</span><span class="o">/</span><span class="n">lib</span><span class="o">/</span><span class="n">cassandra</span><span class="o">/</span><span class="n">data</span><span class="o">/</span><span class="n">keyspace1</span><span class="o">/</span><span class="n">standard1</span><span class="o">-</span><span class="n">f6845640a6cb11e8b6836d2c86545d91</span><span class="o">/</span><span class="n">mc</span><span class="o">-</span><span class="mi">1</span><span class="o">-</span><span class="n">big</span><span class="o">-</span><span class="n">Data</span><span class="o">.</span><span class="n">db</span>
<span class="n">sstablemetadata</span> <span class="o">/</span><span class="n">var</span><span class="o">/</span><span class="n">lib</span><span class="o">/</span><span class="n">cassandra</span><span class="o">/</span><span class="n">data</span><span class="o">/</span><span class="n">keyspace1</span><span class="o">/</span><span class="n">standard1</span><span class="o">-</span><span class="n">f6845640a6cb11e8b6836d2c86545d91</span><span class="o">/</span><span class="n">mc</span><span class="o">-</span><span class="mi">1</span><span class="o">-</span><span class="n">big</span><span class="o">-</span><span class="n">Data</span><span class="o">.</span><span class="n">db</span>
<span class="n">SSTable</span><span class="p">:</span> <span class="o">/</span><span class="n">var</span><span class="o">/</span><span class="n">lib</span><span class="o">/</span><span class="n">cassandra</span><span class="o">/</span><span class="n">data</span><span class="o">/</span><span class="n">keyspace1</span><span class="o">/</span><span class="n">standard1</span><span class="o">-</span><span class="n">f6845640a6cb11e8b6836d2c86545d91</span><span class="o">/</span><span class="n">mc</span><span class="o">-</span><span class="mi">1</span><span class="o">-</span><span class="n">big</span>
<span class="n">Partitioner</span><span class="p">:</span> <span class="n">org</span><span class="o">.</span><span class="n">apache</span><span class="o">.</span><span class="n">cassandra</span><span class="o">.</span><span class="n">dht</span><span class="o">.</span><span class="n">Murmur3Partitioner</span>
<span class="n">Bloom</span> <span class="n">Filter</span> <span class="n">FP</span> <span class="n">chance</span><span class="p">:</span> <span class="mf">0.010000</span>
<span class="n">Minimum</span> <span class="n">timestamp</span><span class="p">:</span> <span class="mi">1535025576141000</span>
<span class="n">Maximum</span> <span class="n">timestamp</span><span class="p">:</span> <span class="mi">1535025604309000</span>
<span class="n">SSTable</span> <span class="nb">min</span> <span class="n">local</span> <span class="n">deletion</span> <span class="n">time</span><span class="p">:</span> <span class="mi">2147483647</span>
<span class="n">SSTable</span> <span class="nb">max</span> <span class="n">local</span> <span class="n">deletion</span> <span class="n">time</span><span class="p">:</span> <span class="mi">2147483647</span>
<span class="n">Compressor</span><span class="p">:</span> <span class="n">org</span><span class="o">.</span><span class="n">apache</span><span class="o">.</span><span class="n">cassandra</span><span class="o">.</span><span class="n">io</span><span class="o">.</span><span class="n">compress</span><span class="o">.</span><span class="n">LZ4Compressor</span>
<span class="n">TTL</span> <span class="nb">min</span><span class="p">:</span> <span class="mi">86400</span>
<span class="n">TTL</span> <span class="nb">max</span><span class="p">:</span> <span class="mi">86400</span>
<span class="n">First</span> <span class="n">token</span><span class="p">:</span> <span class="o">-</span><span class="mi">9223004712949498654</span> <span class="p">(</span><span class="n">key</span><span class="o">=</span><span class="mi">39373333373831303130</span><span class="p">)</span>
<span class="n">Last</span> <span class="n">token</span><span class="p">:</span> <span class="mi">9222554117157811897</span> <span class="p">(</span><span class="n">key</span><span class="o">=</span><span class="mi">4</span><span class="n">f3438394e39374d3730</span><span class="p">)</span>
<span class="n">Estimated</span> <span class="n">droppable</span> <span class="n">tombstones</span><span class="p">:</span> <span class="mf">0.9188263888888889</span>
<span class="n">SSTable</span> <span class="n">Level</span><span class="p">:</span> <span class="mi">0</span>
<span class="n">Repaired</span> <span class="n">at</span><span class="p">:</span> <span class="mi">0</span>
<span class="n">Replay</span> <span class="n">positions</span> <span class="n">covered</span><span class="p">:</span> <span class="p">{</span><span class="n">CommitLogPosition</span><span class="p">(</span><span class="n">segmentId</span><span class="o">=</span><span class="mi">1535025390651</span><span class="p">,</span> <span class="n">position</span><span class="o">=</span><span class="mi">226400</span><span class="p">)</span><span class="o">=</span><span class="n">CommitLogPosition</span><span class="p">(</span><span class="n">segmentId</span><span class="o">=</span><span class="mi">1535025390651</span><span class="p">,</span> <span class="n">position</span><span class="o">=</span><span class="mi">6849139</span><span class="p">)}</span>
<span class="n">totalColumnsSet</span><span class="p">:</span> <span class="mi">100000</span>
<span class="n">totalRows</span><span class="p">:</span> <span class="mi">20000</span>
<span class="n">Estimated</span> <span class="n">tombstone</span> <span class="n">drop</span> <span class="n">times</span><span class="p">:</span>
<span class="mi">1535039100</span><span class="p">:</span> <span class="mi">80390</span>
<span class="mi">1535039160</span><span class="p">:</span> <span class="mi">5645</span>
<span class="mi">1535039220</span><span class="p">:</span> <span class="mi">13965</span>
<span class="n">Count</span> <span class="n">Row</span> <span class="n">Size</span> <span class="n">Cell</span> <span class="n">Count</span>
<span class="mi">1</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">2</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">3</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">4</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">5</span> <span class="mi">0</span> <span class="mi">20000</span>
<span class="mi">6</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">7</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">8</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">10</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">12</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">14</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">17</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">20</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">24</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">29</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">35</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">42</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">50</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">60</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">72</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">86</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">103</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">124</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">149</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">179</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">215</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">258</span> <span class="mi">20000</span> <span class="mi">0</span>
<span class="mi">310</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">372</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">446</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">535</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">642</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">770</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">924</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">1109</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">1331</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">1597</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">1916</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">2299</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">2759</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">3311</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">3973</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">4768</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">5722</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">6866</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">8239</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">9887</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">11864</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">14237</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">17084</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">20501</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">24601</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">29521</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">35425</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">42510</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">51012</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">61214</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">73457</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">88148</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">105778</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">126934</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">152321</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">182785</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">219342</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">263210</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">315852</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">379022</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">454826</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">545791</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">654949</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">785939</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">943127</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">1131752</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">1358102</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">1629722</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">1955666</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">2346799</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">2816159</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">3379391</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">4055269</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">4866323</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">5839588</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">7007506</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">8409007</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">10090808</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">12108970</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">14530764</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">17436917</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">20924300</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">25109160</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">30130992</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">36157190</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">43388628</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">52066354</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">62479625</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">74975550</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">89970660</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">107964792</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">129557750</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">155469300</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">186563160</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">223875792</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">268650950</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">322381140</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">386857368</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">464228842</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">557074610</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">668489532</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">802187438</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">962624926</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">1155149911</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">1386179893</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">1663415872</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">1996099046</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">2395318855</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="mi">2874382626</span> <span class="mi">0</span>
<span class="mi">3449259151</span> <span class="mi">0</span>
<span class="mi">4139110981</span> <span class="mi">0</span>
<span class="mi">4966933177</span> <span class="mi">0</span>
<span class="mi">5960319812</span> <span class="mi">0</span>
<span class="mi">7152383774</span> <span class="mi">0</span>
<span class="mi">8582860529</span> <span class="mi">0</span>
<span class="mi">10299432635</span> <span class="mi">0</span>
<span class="mi">12359319162</span> <span class="mi">0</span>
<span class="mi">14831182994</span> <span class="mi">0</span>
<span class="mi">17797419593</span> <span class="mi">0</span>
<span class="mi">21356903512</span> <span class="mi">0</span>
<span class="mi">25628284214</span> <span class="mi">0</span>
<span class="mi">30753941057</span> <span class="mi">0</span>
<span class="mi">36904729268</span> <span class="mi">0</span>
<span class="mi">44285675122</span> <span class="mi">0</span>
<span class="mi">53142810146</span> <span class="mi">0</span>
<span class="mi">63771372175</span> <span class="mi">0</span>
<span class="mi">76525646610</span> <span class="mi">0</span>
<span class="mi">91830775932</span> <span class="mi">0</span>
<span class="mi">110196931118</span> <span class="mi">0</span>
<span class="mi">132236317342</span> <span class="mi">0</span>
<span class="mi">158683580810</span> <span class="mi">0</span>
<span class="mi">190420296972</span> <span class="mi">0</span>
<span class="mi">228504356366</span> <span class="mi">0</span>
<span class="mi">274205227639</span> <span class="mi">0</span>
<span class="mi">329046273167</span> <span class="mi">0</span>
<span class="mi">394855527800</span> <span class="mi">0</span>
<span class="mi">473826633360</span> <span class="mi">0</span>
<span class="mi">568591960032</span> <span class="mi">0</span>
<span class="mi">682310352038</span> <span class="mi">0</span>
<span class="mi">818772422446</span> <span class="mi">0</span>
<span class="mi">982526906935</span> <span class="mi">0</span>
<span class="mi">1179032288322</span> <span class="mi">0</span>
<span class="mi">1414838745986</span> <span class="mi">0</span>
<span class="n">Estimated</span> <span class="n">cardinality</span><span class="p">:</span> <span class="mi">20196</span>
<span class="n">EncodingStats</span> <span class="n">minTTL</span><span class="p">:</span> <span class="mi">0</span>
<span class="n">EncodingStats</span> <span class="n">minLocalDeletionTime</span><span class="p">:</span> <span class="mi">1442880000</span>
<span class="n">EncodingStats</span> <span class="n">minTimestamp</span><span class="p">:</span> <span class="mi">1535025565275000</span>
<span class="n">KeyType</span><span class="p">:</span> <span class="n">org</span><span class="o">.</span><span class="n">apache</span><span class="o">.</span><span class="n">cassandra</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">marshal</span><span class="o">.</span><span class="n">BytesType</span>
<span class="n">ClusteringTypes</span><span class="p">:</span> <span class="p">[</span><span class="n">org</span><span class="o">.</span><span class="n">apache</span><span class="o">.</span><span class="n">cassandra</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">marshal</span><span class="o">.</span><span class="n">UTF8Type</span><span class="p">]</span>
<span class="n">StaticColumns</span><span class="p">:</span> <span class="p">{</span><span class="n">C3</span><span class="p">:</span><span class="n">org</span><span class="o">.</span><span class="n">apache</span><span class="o">.</span><span class="n">cassandra</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">marshal</span><span class="o">.</span><span class="n">BytesType</span><span class="p">,</span> <span class="n">C4</span><span class="p">:</span><span class="n">org</span><span class="o">.</span><span class="n">apache</span><span class="o">.</span><span class="n">cassandra</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">marshal</span><span class="o">.</span><span class="n">BytesType</span><span class="p">,</span> <span class="n">C0</span><span class="p">:</span><span class="n">org</span><span class="o">.</span><span class="n">apache</span><span class="o">.</span><span class="n">cassandra</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">marshal</span><span class="o">.</span><span class="n">BytesType</span><span class="p">,</span> <span class="n">C1</span><span class="p">:</span><span class="n">org</span><span class="o">.</span><span class="n">apache</span><span class="o">.</span><span class="n">cassandra</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">marshal</span><span class="o">.</span><span class="n">BytesType</span><span class="p">,</span> <span class="n">C2</span><span class="p">:</span><span class="n">org</span><span class="o">.</span><span class="n">apache</span><span class="o">.</span><span class="n">cassandra</span><span class="o">.</span><span class="n">db</span><span class="o">.</span><span class="n">marshal</span><span class="o">.</span><span class="n">BytesType</span><span class="p">}</span>
<span class="n">RegularColumns</span><span class="p">:</span> <span class="p">{}</span>
</pre></div>
</div>
</div>
<div class="section" id="specify-gc-grace-seconds">
<h2>Specify gc grace seconds<a class="headerlink" href="#specify-gc-grace-seconds" title="Permalink to this headline">¶</a></h2>
<p>To see the ratio of droppable tombstones given a configured gc grace seconds, use the gc_grace_seconds option. Because the sstablemetadata tool doesn’t access the schema directly, this is a way to more accurately estimate droppable tombstones – for example, if you pass in gc_grace_seconds matching what is configured in the schema. The gc_grace_seconds value provided is subtracted from the curent machine time (in seconds).</p>
<p>ref: <a class="reference external" href="https://issues.apache.org/jira/browse/CASSANDRA-12208">https://issues.apache.org/jira/browse/CASSANDRA-12208</a></p>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>sstablemetadata /var/lib/cassandra/data/keyspace1/standard1-41b52700b4ed11e896476d2c86545d91/mc-12-big-Data.db | grep &quot;Estimated tombstone drop times&quot; -A4
Estimated tombstone drop times:
1536599100: 1
1536599640: 1
1536599700: 2
echo $(date +%s)
1536602005
# if gc_grace_seconds was configured at 100, all of the tombstones would be currently droppable
sstablemetadata --gc_grace_seconds 100 /var/lib/cassandra/data/keyspace1/standard1-41b52700b4ed11e896476d2c86545d91/mc-12-big-Data.db | grep &quot;Estimated droppable tombstones&quot;
Estimated droppable tombstones: 4.0E-5
# if gc_grace_seconds was configured at 4700, some of the tombstones would be currently droppable
sstablemetadata --gc_grace_seconds 4700 /var/lib/cassandra/data/keyspace1/standard1-41b52700b4ed11e896476d2c86545d91/mc-12-big-Data.db | grep &quot;Estimated droppable tombstones&quot;
Estimated droppable tombstones: 9.61111111111111E-6
# if gc_grace_seconds was configured at 100, none of the tombstones would be currently droppable
sstablemetadata --gc_grace_seconds 5000 /var/lib/cassandra/data/keyspace1/standard1-41b52700b4ed11e896476d2c86545d91/mc-12-big-Data.db | grep &quot;Estimated droppable tombstones&quot;
Estimated droppable tombstones: 0.0
</pre></div>
</div>
</div>
<div class="section" id="explanation-of-each-value-printed-above">
<h2>Explanation of each value printed above<a class="headerlink" href="#explanation-of-each-value-printed-above" title="Permalink to this headline">¶</a></h2>
<table border="1" class="docutils">
<colgroup>
<col width="27%" />
<col width="73%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Value</th>
<th class="head">Explanation</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td>SSTable</td>
<td>prefix of the sstable filenames related to this sstable</td>
</tr>
<tr class="row-odd"><td>Partitioner</td>
<td>partitioner type used to distribute data across nodes; defined in cassandra.yaml</td>
</tr>
<tr class="row-even"><td>Bloom Filter FP</td>
<td>precision of Bloom filter used in reads; defined in the table definition</td>
</tr>
<tr class="row-odd"><td>Minimum timestamp</td>
<td>minimum timestamp of any entry in this sstable, in epoch microseconds</td>
</tr>
<tr class="row-even"><td>Maximum timestamp</td>
<td>maximum timestamp of any entry in this sstable, in epoch microseconds</td>
</tr>
<tr class="row-odd"><td>SSTable min local deletion time</td>
<td>minimum timestamp of deletion date, based on TTL, in epoch seconds</td>
</tr>
<tr class="row-even"><td>SSTable max local deletion time</td>
<td>maximum timestamp of deletion date, based on TTL, in epoch seconds</td>
</tr>
<tr class="row-odd"><td>Compressor</td>
<td>blank (-) by default; if not blank, indicates type of compression enabled on the table</td>
</tr>
<tr class="row-even"><td>TTL min</td>
<td>time-to-live in seconds; default 0 unless defined in the table definition</td>
</tr>
<tr class="row-odd"><td>TTL max</td>
<td>time-to-live in seconds; default 0 unless defined in the table definition</td>
</tr>
<tr class="row-even"><td>First token</td>
<td>lowest token and related key found in the sstable summary</td>
</tr>
<tr class="row-odd"><td>Last token</td>
<td>highest token and related key found in the sstable summary</td>
</tr>
<tr class="row-even"><td>Estimated droppable tombstones</td>
<td>ratio of tombstones to columns, using configured gc grace seconds if relevant</td>
</tr>
<tr class="row-odd"><td>SSTable level</td>
<td>compaction level of this sstable, if leveled compaction (LCS) is used</td>
</tr>
<tr class="row-even"><td>Repaired at</td>
<td>the timestamp this sstable was marked as repaired via sstablerepairedset, in epoch milliseconds</td>
</tr>
<tr class="row-odd"><td>Replay positions covered</td>
<td>the interval of time and commitlog positions related to this sstable</td>
</tr>
<tr class="row-even"><td>totalColumnsSet</td>
<td>number of cells in the table</td>
</tr>
<tr class="row-odd"><td>totalRows</td>
<td>number of rows in the table</td>
</tr>
<tr class="row-even"><td>Estimated tombstone drop times</td>
<td>approximate number of rows that will expire, ordered by epoch seconds</td>
</tr>
<tr class="row-odd"><td>Count Row Size Cell Count</td>
<td>two histograms in two columns; one represents distribution of Row Size
and the other represents distribution of Cell Count</td>
</tr>
<tr class="row-even"><td>Estimated cardinality</td>
<td>an estimate of unique values, used for compaction</td>
</tr>
<tr class="row-odd"><td>EncodingStats* minTTL</td>
<td>in epoch milliseconds</td>
</tr>
<tr class="row-even"><td>EncodingStats* minLocalDeletionTime</td>
<td>in epoch seconds</td>
</tr>
<tr class="row-odd"><td>EncodingStats* minTimestamp</td>
<td>in epoch microseconds</td>
</tr>
<tr class="row-even"><td>KeyType</td>
<td>the type of partition key, useful in reading and writing data
from/to storage; defined in the table definition</td>
</tr>
<tr class="row-odd"><td>ClusteringTypes</td>
<td>the type of clustering key, useful in reading and writing data
from/to storage; defined in the table definition</td>
</tr>
<tr class="row-even"><td>StaticColumns</td>
<td>a list of the shared columns in the table</td>
</tr>
<tr class="row-odd"><td>RegularColumns</td>
<td>a list of non-static, non-key columns in the table</td>
</tr>
</tbody>
</table>
<ul class="simple">
<li>For the encoding stats values, the delta of this and the current epoch time is used when encoding and storing data in the most optimal way.</li>
</ul>
</div>
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