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-561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/from-clause/index.html ---------------------------------------------------------------------- diff --git a/docs/from-clause/index.html b/docs/from-clause/index.html index faf0ba5..b32b3f0 100644 --- a/docs/from-clause/index.html +++ b/docs/from-clause/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/functions-for-handling-nulls/index.html 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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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/getting-to-know-the-drill-sandbox/index.html ---------------------------------------------------------------------- diff --git a/docs/getting-to-know-the-drill-sandbox/index.html b/docs/getting-to-know-the-drill-sandbox/index.html index fc6551e..7005101 100644 --- a/docs/getting-to-know-the-drill-sandbox/index.html +++ b/docs/getting-to-know-the-drill-sandbox/index.html @@ -561,6 +561,10 @@ + <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> 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a/docs/guidelines-for-optimizing-aggregation/index.html +++ b/docs/guidelines-for-optimizing-aggregation/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/handling-different-data-types/index.html ---------------------------------------------------------------------- diff --git a/docs/handling-different-data-types/index.html b/docs/handling-different-data-types/index.html index 0325d83..c10ca89 100644 --- a/docs/handling-different-data-types/index.html +++ b/docs/handling-different-data-types/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/having-clause/index.html ---------------------------------------------------------------------- diff --git a/docs/having-clause/index.html b/docs/having-clause/index.html index ad6cfdb..42a9f97 100644 --- a/docs/having-clause/index.html +++ b/docs/having-clause/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/hbase-storage-plugin/index.html ---------------------------------------------------------------------- diff --git a/docs/hbase-storage-plugin/index.html b/docs/hbase-storage-plugin/index.html index 6703e45..e019090 100644 --- a/docs/hbase-storage-plugin/index.html +++ b/docs/hbase-storage-plugin/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/hive-metadata-caching/index.html ---------------------------------------------------------------------- diff --git a/docs/hive-metadata-caching/index.html b/docs/hive-metadata-caching/index.html new file mode 100644 index 0000000..819ff7c --- /dev/null +++ b/docs/hive-metadata-caching/index.html @@ -0,0 +1,1134 @@ +<!DOCTYPE html> +<html> + +<head> + +<meta charset="UTF-8"> +<meta name=viewport content="width=device-width, initial-scale=1"> + + +<title>Hive Metadata Caching - Apache Drill</title> + +<link 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Driver</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-tdc-file-on-windows/">Installing the TDC File on Windows</a></li> + + </ul> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Configuring ODBC</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-configuration-reference/">ODBC Configuration Reference</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-linux/">Configuring ODBC on Linux</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-mac-os-x/">Configuring ODBC on Mac OS X</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-windows/">Configuring ODBC on Windows</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li> + + </ul> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Using Drill Explorer</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/drill-explorer-introduction/">Drill Explorer Introduction</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-drill-explorer-to-data/">Connecting Drill Explorer to Data</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/browsing-data-and-defining-views/">Browsing Data and Defining Views</a></li> + + </ul> + + + + <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li> + <ul style="display: none"> + + <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</a></li> + + <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li> + + <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-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/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-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 current_section "><a href="javascript: void(0);">Performance Tuning</a></li> + <ul class="current_section"> + + + <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/optimizing-parquet-metadata-reading/">Optimizing Parquet Metadata Reading</a></li> + + + + <li class="toctree-l2 current"><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/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> + + + </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/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-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 class="reference internal" href="/docs/adding-custom-functions-to-drill/">Adding Custom Functions to Drill</a></li> + + + + <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 class="reference internal" href="/docs/rest-api/">REST API</a></li> + + + + <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> + + <li class="toctree-l3"><a class="reference internal" href="/docs/drill-patch-review-tool/">Drill Patch Review Tool</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-1-4-0-release-notes/">Apache Drill 1.4.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-3-0-release-notes/">Apache Drill 1.3.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-2-0-release-notes/">Apache Drill 1.2.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-1-0-release-notes/">Apache Drill 1.1.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-1-0-0-release-notes/">Apache Drill 1.0.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-9-0-release-notes/">Apache Drill 0.9.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-8-0-release-notes/">Apache Drill 0.8.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-7-0-release-notes/">Apache Drill 0.7.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-6-0-release-notes/">Apache Drill 0.6.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-m1-release-notes-apache-drill-alpha/">Apache Drill M1 Release Notes (Apache Drill Alpha)</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-5-0-release-notes/">Apache Drill 0.5.0 Release Notes</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/apache-drill-0-4-0-release-notes/">Apache Drill 0.4.0 Release Notes</a></li> + + + </ul> + + + + <li class="toctree-l1"><a href="javascript: void(0);">Sample Datasets</a></li> + <ul style="display: none"> + + + <li class="toctree-l2"><a class="reference internal" href="/docs/aol-search/">AOL Search</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/enron-emails/">Enron Emails</a></li> + + + + <li class="toctree-l2"><a class="reference internal" href="/docs/wikipedia-edit-history/">Wikipedia Edit History</a></li> + + + </ul> + + + + <li class="toctree-l1"><a class="reference internal" href="/docs/project-bylaws/">Project Bylaws</a></li> + + + </ul> + + </div> + </div> +</aside> + + +<nav class="breadcrumbs"> + <li><a href="/docs/">Docs</a></li> + + + <li><a href="/docs/performance-tuning/">Performance Tuning</a></li> + + <li>Hive Metadata Caching</li> +</nav> + +<div class="main-content-wrapper"> + <div class="main-content"> + + + <a class="edit-link" href="https://github.com/apache/drill/blob/gh-pages/_docs/performance-tuning/026-hive-metadata-caching.md"; target="_blank"><i class="fa fa-pencil-square-o"></i></a> + + + <div class="int_title left"> + <h1>Hive Metadata Caching</h1> + + </div> + + + + <link href="/css/docpage.css" rel="stylesheet" type="text/css"> + + <div class="int_text" align="left"> + + <p>Drill caches Hive metadata in a Hive metastore client cache that resides in Drill instead of accessing the Hive metastore directly. During a query, Drill can access metadata faster from the cache than from the Hive metastore. By default, the Hive metastore client cache has a TTL (time to live) of 60 seconds. The TTL is how long cache entries exist before the cache reloads metadata from the Hive metastore. Drill expires an entry in the cache 60 seconds after the following events: </p> + +<ul> +<li> creation of the entry</li> +<li> a read or write operation on the entry</li> +<li> the most recent replacement of the entry value<br></li> +</ul> + +<p>You can modify the TTL depending on how frequently the Hive metadata is updated. If the Hive metadata is updated frequently, decrease the cache TTL value. If Hive metadata is updated infrequently, increase the cache TTL value.</p> + +<p>For example, when you run a Drill query on a Hive table, Drill refreshes the cache 60 seconds after the read on the table. If the table is updated in Hive within that 60 second window and you issue another query on the table, the query would return incorrect results or an execution error due to a stale cache. In such a scenario where Hive metadata is changing so quickly, you may want to reduce the cache TTL to 2 seconds so that Drill refreshes the cache more frequently. </p> + +<h2 id="configuring-the-cache">Configuring the Cache</h2> + +<p>As of Drill 1.5, you can modify the Hive storage plugin to change the rate at which the cache is reloaded. You can also modify whether the cache reloads after reads and writes or just writes. </p> + +<div class="admonition note"> + <p class="first admonition-title">Note</p> + <p class="last">The configuration applies specifically to the storage plugin that you modify. If you have multiple Hive storage plugins configured in Drill, the configuration does not apply globally. You can configure a different caching policy for each Hive metastore server. </p> +</div> + +<p>To configure the Hive metastore client cache in Drill, complete the following steps: </p> + +<ol> +<li>Start the <a href="/docs/starting-the-web-console/">Drill Web Console</a>.</li> +<li>Select the <strong>Storage</strong> tab.</li> +<li>Click <strong>Update</strong> next to the âhiveâ storage plugin.</li> +<li><p>Add the following parameters: </p> +<div class="highlight"><pre><code class="language-text" data-lang="text"> "hive.metastore.cache-ttl-seconds": "<value>", + "hive.metastore.cache-expire-after": "<value>" +</code></pre></div> +<p>The <code>cache-ttl-seconds</code> value can be any non-negative value, including 0, which turns caching off. The <code>cache-expire-after</code> value can be â<code>access</code>â or â<code>write</code>â. Access indicates expiry after a read or write operation, and write indicates expiry after a write operation only.</p></li> +<li><p><strong>Enable</strong> the storage plugin to save the changes. </p></li> +</ol> + +<p>Example: </p> +<div class="highlight"><pre><code class="language-text" data-lang="text"> { + "type": "hive", + "enabled": false, + "configProps": { + "hive.metastore.uris": "", + "javax.jdo.option.ConnectionURL": "jdbc:derby:;databaseName=../sample-data/drill_hive_db;create=true", + "hive.metastore.warehouse.dir": "/tmp/drill_hive_wh", + "fs.default.name": "file:///", + "hive.metastore.sasl.enabled": "false" + "hive.metastore.cache-ttl-seconds": "2", + "hive.metastore.cache-expire-after": "access" + + } + } +</code></pre></div> + + + <div class="doc-nav"> + + <span class="previous-toc"><a href="/docs/optimizing-parquet-metadata-reading/">â Optimizing Parquet Metadata Reading</a></span><span class="next-toc"><a href="/docs/choosing-a-storage-format/">Choosing a Storage Format â</a></span> +</div> + + + </div> + </div> +</div> + + </div> + <p class="push"></p> +<div id="footer" class="mw"> +<div class="wrapper"> +Copyright © 2012-2014 The Apache Software Foundation, licensed under the Apache License, Version 2.0.<br> +Apache and the Apache feather logo are trademarks of The Apache Software Foundation. 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b/docs/hive-storage-plugin/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/hive-to-drill-data-type-mapping/index.html ---------------------------------------------------------------------- diff --git a/docs/hive-to-drill-data-type-mapping/index.html b/docs/hive-to-drill-data-type-mapping/index.html index 860a927..22fb732 100644 --- a/docs/hive-to-drill-data-type-mapping/index.html +++ b/docs/hive-to-drill-data-type-mapping/index.html @@ -561,6 +561,10 @@ + <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 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b/docs/install-drill/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/installing-drill-in-distributed-mode/index.html ---------------------------------------------------------------------- diff --git a/docs/installing-drill-in-distributed-mode/index.html b/docs/installing-drill-in-distributed-mode/index.html index 24e4c07..9cc9719 100644 --- a/docs/installing-drill-in-distributed-mode/index.html +++ b/docs/installing-drill-in-distributed-mode/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/installing-drill-in-embedded-mode/index.html ---------------------------------------------------------------------- diff --git a/docs/installing-drill-in-embedded-mode/index.html b/docs/installing-drill-in-embedded-mode/index.html index 0546a46..80744cc 100644 --- a/docs/installing-drill-in-embedded-mode/index.html +++ b/docs/installing-drill-in-embedded-mode/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/installing-drill-on-linux-and-mac-os-x/index.html ---------------------------------------------------------------------- diff --git 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<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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/installing-drill-on-windows/index.html ---------------------------------------------------------------------- diff --git a/docs/installing-drill-on-windows/index.html b/docs/installing-drill-on-windows/index.html index cd07c82..3c281c3 100644 --- a/docs/installing-drill-on-windows/index.html +++ b/docs/installing-drill-on-windows/index.html @@ -561,6 +561,10 @@ + <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> 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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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/installing-the-driver-on-windows/index.html ---------------------------------------------------------------------- diff --git a/docs/installing-the-driver-on-windows/index.html b/docs/installing-the-driver-on-windows/index.html index 5f62198..9a23ca7 100644 --- a/docs/installing-the-driver-on-windows/index.html +++ b/docs/installing-the-driver-on-windows/index.html @@ -561,6 +561,10 @@ + <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> 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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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/lesson-3-run-queries-on-complex-data-types/index.html ---------------------------------------------------------------------- diff --git a/docs/lesson-3-run-queries-on-complex-data-types/index.html b/docs/lesson-3-run-queries-on-complex-data-types/index.html index 61c8227..429c612 100644 --- a/docs/lesson-3-run-queries-on-complex-data-types/index.html +++ b/docs/lesson-3-run-queries-on-complex-data-types/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/lexical-structure/index.html ---------------------------------------------------------------------- diff --git a/docs/lexical-structure/index.html b/docs/lexical-structure/index.html index 3a3435c..dc9ede6 100644 --- a/docs/lexical-structure/index.html +++ b/docs/lexical-structure/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/limit-clause/index.html ---------------------------------------------------------------------- diff --git a/docs/limit-clause/index.html b/docs/limit-clause/index.html index 9403dc9..52fc848 100644 --- a/docs/limit-clause/index.html +++ b/docs/limit-clause/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/log-and-debug-introduction/index.html ---------------------------------------------------------------------- diff --git a/docs/log-and-debug-introduction/index.html b/docs/log-and-debug-introduction/index.html index c6d3fc3..64c1294 100644 --- a/docs/log-and-debug-introduction/index.html +++ b/docs/log-and-debug-introduction/index.html @@ -561,6 +561,10 @@ + <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> http://git-wip-us.apache.org/repos/asf/drill-site/blob/94b50724/docs/log-and-debug/index.html ---------------------------------------------------------------------- diff --git a/docs/log-and-debug/index.html b/docs/log-and-debug/index.html index b83b208..f121528 100644 --- a/docs/log-and-debug/index.html +++ b/docs/log-and-debug/index.html @@ -561,6 +561,10 @@ + <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>
