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Yang, Tong
48706b7552
Reviewed-by: Kacur, Michal <michal.kacur@t-systems.com> Co-authored-by: Yang, Tong <yangtong2@huawei.com> Co-committed-by: Yang, Tong <yangtong2@huawei.com>
24 lines
3.1 KiB
HTML
24 lines
3.1 KiB
HTML
<a name="mrs_01_24789"></a><a name="mrs_01_24789"></a>
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<h1 class="topictitle1">Enabling the CPU Priority Feature</h1>
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<div id="body0000001532995210"><div class="note" id="mrs_01_24789__note4801192142620"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="mrs_01_24789__p1580111219264">This section applies only to MRS 3.2.0 or later.</p>
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</div></div>
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<div class="section" id="mrs_01_24789__section145512011142916"><h4 class="sectiontitle">Scenario</h4><p id="mrs_01_24789__p163114489264">ClickHouse tenants support CPU priorities. This feature depends on CAP_SYS_NICE of the OS and takes effect only after being enabled.</p>
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</div>
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<div class="section" id="mrs_01_24789__section484117239293"><h4 class="sectiontitle">Procedure</h4><ol id="mrs_01_24789__ol7763182811292"><li id="mrs_01_24789__li187631128202911"><span>Log in to the ClickHouseServer node as user <strong id="mrs_01_24789__b992315236322">root</strong> and run the following command:</span><p><p id="mrs_01_24789__p16479988720"><strong id="mrs_01_24789__b126041050171619">setcap cap_sys_nice=+ep /opt/Bigdata/FusionInsight_ClickHouse_*/install/FusionInsight-ClickHouse-*/clickhouse/bin/clickhouse</strong></p>
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<div class="note" id="mrs_01_24789__note386362721812"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="mrs_01_24789__p886342710185">You need to run this command on all ClickHouseServer nodes.</p>
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</div></div>
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</p></li><li id="mrs_01_24789__li9763122882911"><span>Log in to FusionInsight Manager and choose <strong id="mrs_01_24789__b19965571929745">Cluster</strong> > <strong id="mrs_01_24789__b11597210139745">Services</strong> > <strong id="mrs_01_24789__b10245989899745">ClickHouse</strong>. Cick the <strong id="mrs_01_24789__b5200506009745">Instance</strong> tab. Select all ClickHouseServer instances, and choose <strong id="mrs_01_24789__b16335018769745">More</strong> > <strong id="mrs_01_24789__b15430842749745">Restart Instance</strong>.</span></li><li id="mrs_01_24789__li37631282298"><span>Run the following command to check whether the CPU priority feature is enabled:</span><p><p id="mrs_01_24789__p16433205619355"><strong id="mrs_01_24789__b1457920641717">getcap /opt/Bigdata/FusionInsight_ClickHouse_*/install/FusionInsight-ClickHouse-*/clickhouse/bin/clickhouse</strong></p>
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<div class="p" id="mrs_01_24789__p1130452763617">The following command output indicates that the feature has been enabled:<pre class="screen" id="mrs_01_24789__screen1453954103516">/opt/Bigdata/FusionInsight_ClickHouse_*/install/FusionInsight-ClickHouse*/clickhouse/bin/clickhouse = cap_sys_nice+ep</pre>
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</div>
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</p></li><li id="mrs_01_24789__li131831176312"><span>(Optional) If the current cluster runs SUSE, run the following command on each ClickHouseServer node:</span><p><p id="mrs_01_24789__p1510985453017"><strong id="mrs_01_24789__b11922131220314">sudo zypper install libcap-progs</strong></p>
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</p></li></ol>
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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_24784.html">ClickHouse Multi-Tenancy</a></div>
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</div>
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</div>
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