[
https://issues.apache.org/jira/browse/PARQUET-1055?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ryan Blue updated PARQUET-1055:
-------------------------------
Fix Version/s: (was: 1.9.1)
> Improve the creation of ExecutorService when reading footers
> ------------------------------------------------------------
>
> Key: PARQUET-1055
> URL: https://issues.apache.org/jira/browse/PARQUET-1055
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-mr
> Affects Versions: 1.9.0
> Reporter: Benoit Lacelle
> Priority: Minor
>
> Doing some benchmarks loading a large set of parquet files (3000+) from the
> local FS, we observed some inefficiencies in the number of created threads
> when reading footers.
> By reading, the read the configuration parallelism in Hadoop configuration
> (defaulted to 5) and allocate 2 ExecuteService with each 5 threads to read
> footers. This is especially inefficient if there is less Callable to handle
> than the configured parallelism.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
