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<div class="section" id="sstableverify">
<h1>sstableverify<a class="headerlink" href="#sstableverify" title="Permalink to this headline"></a></h1>
<p>Check sstable(s) for errors or corruption, for the provided table.</p>
<p>ref: <a class="reference external" href="https://issues.apache.org/jira/browse/CASSANDRA-5791">https://issues.apache.org/jira/browse/CASSANDRA-5791</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>sstableverify &lt;options&gt; &lt;keyspace&gt; &lt;table&gt;</p>
<table class="docutils align-default">
<colgroup>
<col style="width: 30%" />
<col style="width: 70%" />
</colgroup>
<tbody>
<tr class="row-odd"><td><p>–debug</p></td>
<td><p>display stack traces</p></td>
</tr>
<tr class="row-even"><td><p>-e, –extended</p></td>
<td><p>extended verification</p></td>
</tr>
<tr class="row-odd"><td><p>-h, –help</p></td>
<td><p>display this help message</p></td>
</tr>
<tr class="row-even"><td><p>-v, –verbose</p></td>
<td><p>verbose output</p></td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="basic-verification">
<h2>Basic Verification<a class="headerlink" href="#basic-verification" title="Permalink to this headline"></a></h2>
<p>This is the basic verification. It is not a very quick process, and uses memory. You might need to increase your memory settings if you have many sstables.</p>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sstableverify</span> <span class="n">keyspace</span> <span class="n">eventlog</span>
<span class="n">Verifying</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-32-big-Data.db&#39;</span><span class="p">)</span> <span class="p">(</span><span class="mf">7.353</span><span class="n">MiB</span><span class="p">)</span>
<span class="n">Deserializing</span> <span class="n">sstable</span> <span class="n">metadata</span> <span class="k">for</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-32-big-Data.db&#39;</span><span class="p">)</span>
<span class="n">Checking</span> <span class="n">computed</span> <span class="nb">hash</span> <span class="n">of</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-32-big-Data.db&#39;</span><span class="p">)</span>
<span class="n">Verifying</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-37-big-Data.db&#39;</span><span class="p">)</span> <span class="p">(</span><span class="mf">3.775</span><span class="n">MiB</span><span class="p">)</span>
<span class="n">Deserializing</span> <span class="n">sstable</span> <span class="n">metadata</span> <span class="k">for</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-37-big-Data.db&#39;</span><span class="p">)</span>
<span class="n">Checking</span> <span class="n">computed</span> <span class="nb">hash</span> <span class="n">of</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-37-big-Data.db&#39;</span><span class="p">)</span>
</pre></div>
</div>
</div>
<div class="section" id="extended-verification">
<h2>Extended Verification<a class="headerlink" href="#extended-verification" title="Permalink to this headline"></a></h2>
<p>During an extended verification, the individual values will be validated for errors or corruption. This of course takes more time.</p>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">root</span><span class="nd">@DC1C1</span><span class="p">:</span><span class="o">/</span><span class="c1"># sstableverify -e keyspace eventlog</span>
<span class="n">WARN</span> <span class="mi">14</span><span class="p">:</span><span class="mi">08</span><span class="p">:</span><span class="mi">06</span><span class="p">,</span><span class="mi">255</span> <span class="n">Only</span> <span class="mf">33.096</span><span class="n">GiB</span> <span class="n">free</span> <span class="n">across</span> <span class="nb">all</span> <span class="n">data</span> <span class="n">volumes</span><span class="o">.</span> <span class="n">Consider</span> <span class="n">adding</span> <span class="n">more</span> <span class="n">capacity</span> <span class="n">to</span> <span class="n">your</span> <span class="n">cluster</span> <span class="ow">or</span> <span class="n">removing</span> <span class="n">obsolete</span> <span class="n">snapshots</span>
<span class="n">Verifying</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-32-big-Data.db&#39;</span><span class="p">)</span> <span class="p">(</span><span class="mf">7.353</span><span class="n">MiB</span><span class="p">)</span>
<span class="n">Deserializing</span> <span class="n">sstable</span> <span class="n">metadata</span> <span class="k">for</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-32-big-Data.db&#39;</span><span class="p">)</span>
<span class="n">Checking</span> <span class="n">computed</span> <span class="nb">hash</span> <span class="n">of</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-32-big-Data.db&#39;</span><span class="p">)</span>
<span class="n">Extended</span> <span class="n">Verify</span> <span class="n">requested</span><span class="p">,</span> <span class="n">proceeding</span> <span class="n">to</span> <span class="n">inspect</span> <span class="n">values</span>
<span class="n">Verify</span> <span class="n">of</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-32-big-Data.db&#39;</span><span class="p">)</span> <span class="n">succeeded</span><span class="o">.</span> <span class="n">All</span> <span class="mi">33211</span> <span class="n">rows</span> <span class="n">read</span> <span class="n">successfully</span>
<span class="n">Verifying</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-37-big-Data.db&#39;</span><span class="p">)</span> <span class="p">(</span><span class="mf">3.775</span><span class="n">MiB</span><span class="p">)</span>
<span class="n">Deserializing</span> <span class="n">sstable</span> <span class="n">metadata</span> <span class="k">for</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-37-big-Data.db&#39;</span><span class="p">)</span>
<span class="n">Checking</span> <span class="n">computed</span> <span class="nb">hash</span> <span class="n">of</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-37-big-Data.db&#39;</span><span class="p">)</span>
<span class="n">Extended</span> <span class="n">Verify</span> <span class="n">requested</span><span class="p">,</span> <span class="n">proceeding</span> <span class="n">to</span> <span class="n">inspect</span> <span class="n">values</span>
<span class="n">Verify</span> <span class="n">of</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-37-big-Data.db&#39;</span><span class="p">)</span> <span class="n">succeeded</span><span class="o">.</span> <span class="n">All</span> <span class="mi">17068</span> <span class="n">rows</span> <span class="n">read</span> <span class="n">successfully</span>
</pre></div>
</div>
</div>
<div class="section" id="corrupted-file">
<h2>Corrupted File<a class="headerlink" href="#corrupted-file" title="Permalink to this headline"></a></h2>
<p>Corrupted files are listed if they are detected by the script.</p>
<p>Example:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sstableverify</span> <span class="n">keyspace</span> <span class="n">eventlog</span>
<span class="n">Verifying</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-40-big-Data.db&#39;</span><span class="p">)</span> <span class="p">(</span><span class="mf">7.416</span><span class="n">MiB</span><span class="p">)</span>
<span class="n">Deserializing</span> <span class="n">sstable</span> <span class="n">metadata</span> <span class="k">for</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-40-big-Data.db&#39;</span><span class="p">)</span>
<span class="n">Checking</span> <span class="n">computed</span> <span class="nb">hash</span> <span class="n">of</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-40-big-Data.db&#39;</span><span class="p">)</span>
<span class="n">Error</span> <span class="n">verifying</span> <span class="n">BigTableReader</span><span class="p">(</span><span class="n">path</span><span class="o">=</span><span class="s1">&#39;/var/lib/cassandra/data/keyspace/eventlog-6365332094dd11e88f324f9c503e4753/mc-40-big-Data.db&#39;</span><span class="p">):</span> <span class="n">Corrupted</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">keyspace</span><span class="o">/</span><span class="n">eventlog</span><span class="o">-</span><span class="mi">6365332094</span><span class="n">dd11e88f324f9c503e4753</span><span class="o">/</span><span class="n">mc</span><span class="o">-</span><span class="mi">40</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>
</pre></div>
</div>
<p>A similar (but less verbose) tool will show the suggested actions:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">nodetool</span> <span class="n">verify</span> <span class="n">keyspace</span> <span class="n">eventlog</span>
<span class="n">error</span><span class="p">:</span> <span class="n">Invalid</span> <span class="n">SSTable</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">keyspace</span><span class="o">/</span><span class="n">eventlog</span><span class="o">-</span><span class="mi">6365332094</span><span class="n">dd11e88f324f9c503e4753</span><span class="o">/</span><span class="n">mc</span><span class="o">-</span><span class="mi">40</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="p">,</span> <span class="n">please</span> <span class="n">force</span> <span class="n">repair</span>
</pre></div>
</div>
</div>
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