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Yang, Tong
6182f91ba8
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>
22 lines
2.8 KiB
HTML
22 lines
2.8 KiB
HTML
<a name="mrs_01_0981"></a><a name="mrs_01_0981"></a>
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<h1 class="topictitle1">Optimizing Data Storage</h1>
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<div id="body1590395285872"><div class="section" id="mrs_01_0981__se52ab55815f94e24ac3bcd8ae53a32d6"><h4 class="sectiontitle">Scenario</h4><p id="mrs_01_0981__en-us_topic_0116526923_p614804094853"><span class="parmname" id="mrs_01_0981__pdc739c0af81c44698c2110d83d0c4ed9"><b>ORC</b></span> is an efficient column storage format and has higher compression ratio and reading efficiency than other file formats.</p>
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<p id="mrs_01_0981__en-us_topic_0116526923_p610389289490">You are advised to use <span class="parmname" id="mrs_01_0981__p0695bd783aeb4c9888ebd49509bce7b8"><b>ORC</b></span> as the default Hive table storage format.</p>
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</div>
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<div class="section" id="mrs_01_0981__s77bfb61dbf8941c19cad009e5782b8dc"><h4 class="sectiontitle">Prerequisites</h4><p id="mrs_01_0981__a0176816d772f4b0a8dcb8f0b09897263">You have logged in to the Hive client. For details, see <a href="mrs_01_0952.html">Using a Hive Client</a>.</p>
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</div>
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<div class="section" id="mrs_01_0981__s14bc77cb81224b80ac669a9985c173f9"><h4 class="sectiontitle">Procedure</h4><ul id="mrs_01_0981__u0112b0664a8d410aa5319e3c9226106f"><li id="mrs_01_0981__l43da6b63d93841d083ab77424d5456be">Recommended: <span class="parmname" id="mrs_01_0981__p1524ac2ea87347de8342baeac52b6c28"><b>SNAPPY</b></span> compression, which applies to scenarios with even compression ratio and reading efficiency requirements.<p id="mrs_01_0981__p56876141969"><strong id="mrs_01_0981__b1181522013615">Create table <em id="mrs_01_0981__i1668711147610">xx</em> <em id="mrs_01_0981__i968710141062">(col_name data_type)</em> stored as orc tblproperties ("orc.compress"="SNAPPY")</strong><strong id="mrs_01_0981__b113971840269">;</strong></p>
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</li><li id="mrs_01_0981__li1356136061">Available: <span class="parmname" id="mrs_01_0981__parmname17562061368"><b>ZLIB</b></span> compression, which applies to scenarios with high compression ratio requirements.<p id="mrs_01_0981__p14746131719619"><strong id="mrs_01_0981__b43111623666">Create table <em id="mrs_01_0981__i1974617171066">xx</em> <em id="mrs_01_0981__i107465171161">(col_name data_type)</em> stored as orc tblproperties ("orc.compress"="ZLIB")</strong><strong id="mrs_01_0981__b9105123610610">;</strong></p>
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</li></ul>
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<div class="note" id="mrs_01_0981__n2160dcf10f3b46f294bf30a296290c2c"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="mrs_01_0981__a7aaa618ca48542ebb3e6db516c1ac81e"><em id="mrs_01_0981__i1643043219126">xx</em> indicates the specific Hive table name.</p>
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</div></div>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="mrs_01_0977.html">Hive Performance Tuning</a></div>
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</div>
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</div>
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