commit | c8d94e6e365ca21d731617767bd7793f67f32222 | [log] [tgz] |
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author | Kurt Deschler <kdeschle@cloudera.com> | Sun Sep 27 16:37:32 2020 -0500 |
committer | Impala Public Jenkins <impala-public-jenkins@cloudera.com> | Wed Feb 24 00:23:57 2021 +0000 |
tree | a80cbc9ca6842fb4459b39fc1d0195730bc1e025 | |
parent | 8059af8cee3563b42ffe04179add49c15c8067a8 [diff] |
IMPALA-10504: Add tracing for remote block reads This patch logs metadata for the first unexpected remote read of each scanrange when the flag fs_trace_remote_reads is set to true. This logging is intended to help diagnose the root cause of remote reads. Since a message may be logged for each scan range, there could be several hundred lines of output in a degenerate case. However, the remote read condition is not expected and verbose output may be needed to diagnose the root cause. Reviewed-by: Aman Sinha <amsinha@cloudera.com> Change-Id: I8c6a3e92f44813048022edf2b91299b3b0a20257 Reviewed-on: http://gerrit.cloudera.org:8080/17062 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 Apache Hadoop clusters.
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.
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.