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Yang, Tong
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Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com> Co-authored-by: Yang, Tong <yangtong2@huawei.com> Co-committed-by: Yang, Tong <yangtong2@huawei.com>
21 lines
2.6 KiB
HTML
21 lines
2.6 KiB
HTML
<a name="mrs_01_1703"></a><a name="mrs_01_1703"></a>
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<h1 class="topictitle1">Can I Delete or Modify the Data Storage Directory in DataNode?</h1>
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<div id="body1597735020146"><div class="section" id="mrs_01_1703__se7b14f3039db4a1dbf837c4b523242a1"><h4 class="sectiontitle">Question</h4><ul id="mrs_01_1703__uf68b1c28a676476284d72177d3a0972d"><li id="mrs_01_1703__li111081257539">In DataNode, the storage directory of data blocks is specified by <span class="parmname" id="mrs_01_1703__parmname121077575317"><b>dfs.datanode.data.dir</b></span><strong id="mrs_01_1703__b1410819519534">. </strong>Can I modify <span class="parmname" id="mrs_01_1703__parmname131087575318"><b>dfs.datanode.data.dir</b></span> to<strong id="mrs_01_1703__b15108115205318"> </strong>modify the data storage directory?</li><li id="mrs_01_1703__li1810916515538">Can I modify files under the data storage directory?</li></ul>
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<div class="section" id="mrs_01_1703__s63ef049315f640ea9a6c0637a7d81c18"><h4 class="sectiontitle">Answer</h4><p id="mrs_01_1703__p41097595319">During the system installation, you need to configure the <span class="parmname" id="mrs_01_1703__parmname1510916575314"><b>dfs.datanode.data.dir</b></span> parameter to specify one or more root directories.</p>
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<ul id="mrs_01_1703__u9c1adbff73ae4e948750227d5859e35c"><li id="mrs_01_1703__li610916515318">During the system installation, you need to configure the dfs.datanode.data.dir parameter to specify one or more root directories.</li></ul>
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<ul id="mrs_01_1703__u70d71d1ceb4a4bac92ae1e388d78dd84"><li id="mrs_01_1703__li1710915513537">Exercise caution when modifying dfs.datanode.data.dir. You can configure this parameter to add a new data root directory.</li><li id="mrs_01_1703__li20110135125312">Do not modify or delete data blocks in the storage directory. Otherwise, the data blocks will lose.</li></ul>
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<div class="note" id="mrs_01_1703__n11a2db729d6c4bf4a4e4ef5351eb02da"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="mrs_01_1703__p181102510537">Similarly, do not delete the storage directory, or modify or delete data blocks under the directory using the following parameters:</p>
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<ul id="mrs_01_1703__u7368cfff98a440e7ac92d334c38119c9"><li id="mrs_01_1703__li511012518531">dfs.namenode.edits.dir</li><li id="mrs_01_1703__li61106585314">dfs.namenode.name.dir</li><li id="mrs_01_1703__li1411025145319">dfs.journalnode.edits.dir</li></ul>
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</div></div>
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<p id="mrs_01_1703__p103601426105318"></p>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="mrs_01_1690.html">FAQ</a></div>
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