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Posted to commits@drill.apache.org by br...@apache.org on 2018/03/20 00:00:53 UTC
[4/5] drill-site git commit: add cgroup instructions to YARN docs
http://git-wip-us.apache.org/repos/asf/drill-site/blob/a581268d/docs/appendix-e-using-cgroups-to-control-cpu-usage/index.html
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+ <li class="toctree-l3"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-desktop-with-drill/">Using Tibco Spotfire Desktop with Drill</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/using-qlik-sense-with-drill/">Using Qlik Sense with Drill</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-10-2/">Using Apache Drill with Tableau 10.2</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/using-information-builders-webfocus-with-apache-drill/">Using Information Builders’ WebFOCUS with Apache Drill</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-jreport-with-drill/">Configuring JReport with Drill</a></li>
+
+ </ul>
+
+
+ </ul>
+
+
+
+ <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li>
+ <ul style="display: none">
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/querying-avro-files/">Querying Avro Files</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/querying-sequence-files/">Querying Sequence Files</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-console/">Monitoring and Canceling Queries in the Drill Web Console</a></li>
+
+
+ </ul>
+
+
+
+ <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li>
+ <ul style="display: none">
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">Partition Pruning</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/partition-pruning-introduction/">Partition Pruning Introduction</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/how-to-partition-data/">How to Partition Data</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/asynchronous-parquet-reader/">Asynchronous Parquet Reader</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/optimizing-parquet-metadata-reading/">Optimizing Parquet Metadata Reading</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-filter-pushdown/">Parquet Filter Pushdown</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/hive-metadata-caching/">Hive Metadata Caching</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/throttling/">Throttling</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-metrics/">Monitoring Metrics</a></li>
+
+
+ </ul>
+
+
+
+ <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li>
+ <ul style="display: none">
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</a></li>
+
+
+ </ul>
+
+
+
+ <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li>
+ <ul style="display: none">
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">SQL Window Functions</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-introduction/">SQL Window Functions Introduction</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-window-functions/">Aggregate Window Functions</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/ranking-window-functions/">Ranking Window Functions</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/value-window-functions/">Value Window Functions</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-examples/">SQL Window Functions Examples</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/set/">SET</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/reset/">RESET</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/create-temporary-table-as-cttas/">CREATE TEMPORARY TABLE AS (CTTAS)</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/create-function-using-jar/">CREATE FUNCTION USING JAR</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/partition-by-clause/">PARTITION BY Clause</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/drop-function-using-jar/">DROP FUNCTION USING JAR</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/drop-table/">DROP TABLE</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/union-set-operator/">UNION Set Operator</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li>
+
+
+ </ul>
+
+
+
+ <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li>
+ <ul style="display: none">
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/text-files-csv-tsv-psv/">Text Files: CSV, TSV, PSV</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/sequence-files/">Sequence Files</a></li>
+
+
+ </ul>
+
+
+
+ <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li>
+ <ul style="display: none">
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/developing-a-simple-function/">Developing a Simple Function</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/tutorial-develop-a-simple-function/">Tutorial: Develop a Simple Function</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">Adding Custom Functions to Drill</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/adding-custom-functions-to-drill-introduction/">Adding Custom Functions to Drill Introduction</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/manually-adding-custom-functions-to-drill/">Manually Adding Custom Functions to Drill</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/creating-custom-authenticators/">Creating Custom Authenticators</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/dynamic-udfs/">Dynamic UDFs</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li>
+
+
+ </ul>
+
+
+
+ <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li>
+
+
+
+ <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li>
+ <ul style="display: none">
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">REST API</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/rest-api-introduction/">REST API Introduction</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/submitting-queries-from-the-rest-api-when-impersonation-is-enabled-and-authentication-is-disabled/">Submitting Queries from the REST API when Impersonation is Enabled and Authentication is Disabled</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">Contribute to Drill</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-guidelines/">Apache Drill Contribution Guidelines</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/apache-drill-contribution-ideas/">Apache Drill Contribution Ideas</a></li>
+
+ </ul>
+
+
+
+ <li class="toctree-l2"><a href="javascript: void(0);">Design Docs</a></li>
+ <ul style="display: none">
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/drill-plan-syntax/">Drill Plan Syntax</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/rpc-overview/">RPC Overview</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/query-stages/">Query Stages</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/useful-research/">Useful Research</a></li>
+
+ <li class="toctree-l3"><a class="reference internal" href="/docs/value-vectors/">Value Vectors</a></li>
+
+ </ul>
+
+
+ </ul>
+
+
+
+ <li class="toctree-l1"><a href="javascript: void(0);">Release Notes</a></li>
+ <ul style="display: none">
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-13-0-release-notes/">Apache Drill 1.13.0 Release Notes</a></li>
+
+
+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-12-0-release-notes/">Apache Drill 1.12.0 Release Notes</a></li>
+
+
+
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+ <li><a href="/docs/drill-on-yarn/">Drill-on-YARN</a></li>
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+ <li>Appendix E: Using cgroups to Control CPU Usage</li>
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+ <div class="int_title left">
+ <h1>Appendix E: Using cgroups to Control CPU Usage</h1>
+
+ </div>
+
+
+
+ <link href="/css/docpage.css" rel="stylesheet" type="text/css">
+
+ <div class="int_text" align="left">
+
+ <p>Linux cgroups (control groups) enable you to limit system resources to defined user groups or processes. As of Drill 1.13, you can configure a cgroup for Drill (running under YARN) to enforce CPU limits on the Drillbit service by setting the CPU limit on each Drill node in the /etc/cgconfig.conf file.</p>
+
+<p>You can set the CPU limit as a soft or hard limit, or both. The hard limit takes precedence over the soft limit. When Drill hits the hard limit, in-progress queries may not complete. </p>
+
+<h2 id="cpu-limits">CPU Limits</h2>
+
+<p>You set the soft and hard limits with parameters in the /etc/cgconfig.conf file. The following sections describe the parameters for soft and hard limits. </p>
+
+<p><strong>Soft Limit Parameter</strong><br>
+You set the soft limit with the <code>cpu.shares</code> parameter. When you set a soft limit, Drill can exceed the CPU allocated if extra CPU is available for use on the system. Drill can continue to use CPU until there is contention with other processes over the CPU or Drill hits the hard limit. </p>
+
+<p><strong>Hard Limit Parameters</strong><br>
+You set the hard limit with the <code>cpu.cfs_period_us</code> and <code>cpu.cfs_quota_us</code> parameters. The <code>cpu.cfs_period_us</code> and <code>cpu.cfs_quota_us</code> parameters set a hard limit on the amount of CPU time that the Drill process can use. </p>
+
+<ul>
+<li><p><strong><code>cpu.cfs_period_us</code></strong><br>
+The <code>cpu.cfs_quota_us</code> parameter specifies a segment of time (in microseconds represented by <code>us</code> for µs) for how often the access to CPU resources should be reallocated. For example, if tasks in a cgroup can access a single CPU for 0.2 seconds out of every 1 second, set cpu.cfs_quota_us to 200000 and cpu.cfs_period_us to 1000000. The upper limit of the <code>cpu.cfs_quota_us</code> parameter is 1 second and the lower limit is 1000 microseconds. </p></li>
+<li><p><strong><code>cpu.cfs_quota_us</code></strong><br>
+The <code>cpu.cfs_quota_us</code> parameter specifies the total amount of runtime (in microseconds represented by <code>us</code> for µs) for which all tasks in the Drill cgroup can run during one period (as defined by cpu.cfs_period_us). As soon as tasks in the Drill cgroup use the time specified by the quota, they are throttled for the remainder of the time specified by the period and not allowed to run until the next period. For example, if tasks in the Drill cgroup can access a single CPU for 0.2 seconds out of every 1 second, set <code>cpu.cfs_quota_us</code> to 200000 and <code>cpu.cfs_period_us</code> to 1000000. A value of -1 indicates that the group does not have any restrictions on CPU. </p></li>
+</ul>
+
+<h2 id="before-you-begin">Before You Begin</h2>
+
+<p>Each Drill node must have the libcgroup package installed to configure CPU limits for a Drill cgroup. The libcgroup package installs the cgconfig service required to configure and manage the Drill cgroup.</p>
+
+<p>You can install the libcgroup package using the <code>yum install</code> command, as shown: </p>
+<div class="highlight"><pre><code class="language-text" data-lang="text"> yum install libcgroup
+</code></pre></div>
+<h2 id="configuring-cpu-limits">Configuring CPU Limits</h2>
+
+<p>Complete the following steps to set a hard and/or soft limit on Drill CPU usage for the Drill process running on the node: </p>
+
+<p>1-Start the cgconfig service: </p>
+<div class="highlight"><pre><code class="language-text" data-lang="text"> service cgconfig start
+</code></pre></div>
+<p>2-Add a cgroup for Drill in the /etc/cgconfig.conf file: </p>
+<div class="highlight"><pre><code class="language-text" data-lang="text"> group drillcpu {
+ cpu {
+ cpu.shares = 320;
+ cpu.cfs_quota_us = 400000;
+ cpu.cfs_period_us = 100000;
+ }
+ }
+</code></pre></div>
+<p><strong>Note:</strong> The cgroup name is specific to the Drill cgroup and does not correlate with any other configuration. You can give this group any name you prefer. The name drillcpu is used as an example. </p>
+
+<p>In the configuration example, the <code>cpu.shares</code> parameter sets the soft limit. The other two parameters, <code>cpu.cfs_quota_us</code> and <code>cpu.cfs_period_us</code>, set the hard limit. If you prefer to set only one type of limit, remove the parameters that do not apply. </p>
+
+<p>To set a soft limit, allocate a specific number of CPU shares to the Drill cgroup in the configuration. Calculate the CPU shares as: </p>
+<div class="highlight"><pre><code class="language-text" data-lang="text"> 1024 (CPU allocated to Drill/Total available CPU)
+</code></pre></div>
+<p>In the example, CPU shares was calculated as: </p>
+<div class="highlight"><pre><code class="language-text" data-lang="text"> 1024 (10/32) = 320
+</code></pre></div>
+<p>To set a hard limit, add limits to the <code>cpu.cfs_quota_us</code> and <code>cpu.cfs_period_us</code> parameters. In the configuration example, the Drill process can fully utilize 4 CPU. </p>
+
+<p><strong>Note:</strong> The hard limit parameter settings persist after each cgroup service restart. Alternatively, you can set the parameters at the session level using the following commands: </p>
+<div class="highlight"><pre><code class="language-text" data-lang="text"> echo 400000 > /cgroup/cpu/drillcpu/cpu.cfs_quota_us
+ echo 100000 > /cgroup/cpu/drillcpu/cpu.cfs_period_us
+</code></pre></div>
+<p>3-(Optional) If you want the cgconfig service to automatically restart upon system reboots, run the following command: </p>
+<div class="highlight"><pre><code class="language-text" data-lang="text"> chkconfig cgconfig on
+</code></pre></div>
+<p>4-Run the following command to add the Drill process ID (PID) to the /cgroup/cpu/drillcpu/cgroup.procs file, as shown: </p>
+<div class="highlight"><pre><code class="language-text" data-lang="text"> echo 25809 > /cgroup/cpu/drillcpu/cgroup.procs
+</code></pre></div>
+<p><strong>Note:</strong> You must perform this step each time a Drillbit restarts. </p>
+
+<p>For additional information, refer to the following documentation:<br>
+- <a href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html">https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html</a><br>
+- <a href="resource_management_guide/sect-cpu-example_usage">resource_management_guide/sect-cpu-example_usage</a><br>
+- <a href="https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html">https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html</a>
+- <a href="resource_management_guide/sec-cpu_and_memory-use_case">resource_management_guide/sec-cpu_and_memory-use_case</a></p>
+
+
+
+ <div class="doc-nav">
+
+ <span class="previous-toc"><a href="/docs/appendix-d-recreate-the-drill-archive/">← Appendix D: Recreate the Drill Archive</a></span><span class="next-toc"><a href="/docs/install-drill/">Install Drill →</a></span>
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
+
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
+
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
+
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
+
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
+
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
+
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
+
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
+
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
+
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
+
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
+
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+
+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
+
+
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<li class="toctree-l2"><a class="reference internal" href="/docs/appendix-d-recreate-the-drill-archive/">Appendix D: Recreate the Drill Archive</a></li>
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<li class="toctree-l2"><a class="reference internal" href="/docs/appendix-d-recreate-the-drill-archive/">Appendix D: Recreate the Drill Archive</a></li>
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<li class="toctree-l2"><a class="reference internal" href="/docs/appendix-d-recreate-the-drill-archive/">Appendix D: Recreate the Drill Archive</a></li>
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<li class="toctree-l2"><a class="reference internal" href="/docs/appendix-d-recreate-the-drill-archive/">Appendix D: Recreate the Drill Archive</a></li>
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<li class="toctree-l2"><a class="reference internal" href="/docs/appendix-d-recreate-the-drill-archive/">Appendix D: Recreate the Drill Archive</a></li>
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<li class="toctree-l2"><a class="reference internal" href="/docs/appendix-d-recreate-the-drill-archive/">Appendix D: Recreate the Drill Archive</a></li>
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<li class="toctree-l2"><a class="reference internal" href="/docs/appendix-d-recreate-the-drill-archive/">Appendix D: Recreate the Drill Archive</a></li>
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<li class="toctree-l2"><a class="reference internal" href="/docs/appendix-d-recreate-the-drill-archive/">Appendix D: Recreate the Drill Archive</a></li>
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<li class="toctree-l2"><a class="reference internal" href="/docs/appendix-d-recreate-the-drill-archive/">Appendix D: Recreate the Drill Archive</a></li>
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+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
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<li class="toctree-l2"><a class="reference internal" href="/docs/appendix-d-recreate-the-drill-archive/">Appendix D: Recreate the Drill Archive</a></li>
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+ <li class="toctree-l2"><a class="reference internal" href="/docs/appendix-e-using-cgroups-to-control-cpu-usage/">Appendix E: Using cgroups to Control CPU Usage</a></li>
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