commit | 0d49c9d6cc7fc0903d60a78d8aaa996af0249c06 | [log] [tgz] |
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author | stiga-huang <huangquanlong@gmail.com> | Thu Mar 21 14:37:33 2024 +0800 |
committer | Impala Public Jenkins <impala-public-jenkins@cloudera.com> | Fri Mar 22 14:17:58 2024 +0000 |
tree | ae9faf6a14b89aa1a510856f3e71e490843e1280 | |
parent | 74b6df79979c16c980cbf1fe41db555d084bf0ff [diff] |
IMPALA-12929: Skip loading HDFS permissions in local-catalog mode HDFS file/dir permissions are not used at all in local catalog mode - in LocalFsTable, hasWriteAccessToBaseDir() always returns true and getFirstLocationWithoutWriteAccess() always returns null. However, in catalogd, we still load them (in single thread for a table!) which could dominant the table loading time when there are lots of partitions. Note that the table loading process in catalogd is the same no matter what catalog mode is in used. The difference between catalog modes is mainly in how coordinators get metadata from catalogd. Local catalog mode is turned on by setting --catalog_topic_mode=minimal on catalogd and --use_local_catalog=true on coordinators. This patch skips loading HDFS permissions on catalogd when running in local catalog mode. We can revisit it in IMPALA-7539. Tests: - Ran CORE tests Change-Id: I5baa9f6ab0d3888a78ff161ae5caa19e85bc983a Reviewed-on: http://gerrit.cloudera.org:8080/21178 Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Lightning-fast, distributed SQL queries for petabytes of data stored in open data and table formats.
Impala is a modern, massively-distributed, massively-parallel, C++ query engine that lets you analyze, transform and combine data from a variety of data sources:
The fastest way to try out Impala is a quickstart Docker container. You can try out running queries and processing data sets in Impala on a single machine without installing dependencies. It can automatically load test data sets into Apache Kudu and Apache Parquet formats and you can start playing around with Apache Impala SQL within minutes.
To learn more about Impala as a user or administrator, or to try Impala, please visit the Impala homepage. Detailed documentation for administrators and users is available at Apache Impala documentation.
If you are interested in contributing to Impala as a developer, or learning more about Impala's internals and architecture, visit the Impala wiki.
Impala only supports Linux at the moment. Impala supports x86_64 and has experimental support for arm64 (as of Impala 4.0). Impala Requirements contains more detailed information on the minimum CPU requirements.
Impala runs on Linux systems only. The supported distros are
Other systems, e.g. SLES12, may also be supported but are not tested by the community.
This distribution uses cryptographic software and may be subject to export controls. Please refer to EXPORT_CONTROL.md for more information.
See Impala's developer documentation to get started.
Detailed build notes has some detailed information on the project layout and build.