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https://issues.apache.org/jira/browse/IMPALA-7627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16629301#comment-16629301
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Vuk Ercegovac commented on IMPALA-7627:
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Pls include the version (or githash) of Impala from which these measurements
were obtained.
Also, would be useful to have units on those measurements as well as number of
partitions/files.
> Parallel the fetching permission process
> ----------------------------------------
>
> Key: IMPALA-7627
> URL: https://issues.apache.org/jira/browse/IMPALA-7627
> Project: IMPALA
> Issue Type: Improvement
> Reporter: Peikai Zheng
> Assignee: Peikai Zheng
> Priority: Major
>
> There are three phases when the Catalogd loading the metadata of a table.
> Firstly, the Catalogd fetches the metadata from Hive metastore;
> Then, the Catalogd fetches the permission of each partition from HDFS
> NameNode;
> Finally, the Catalogd loads the file descriptor from HDFS NameNode.
> According to my test result:
> ||Average Time(GetFileInfoThread=10) || phase 1 || phase 2 || phase 3||
>
> |idm.sauron_message|9.9917115|459.2106944|95.0179163|
> |default.revenue_enriched|12.3377474|111.2969046|40.827472|
> |default.upp_raw_prod|1.5143162|50.0251426|12.6805323|
> |default.hit_to_beacon_playback_prod|1.4294509|49.7670539|18.3557858|
> |default.sitetracking_enriched|13.0003804|112.8746656|42.1824032|
> |default.player_custom_event|9.2618705|493.4865302|116.4986184|
> |default.revenue_day_est|57.9116561|106.5028664|24.005822|
> The majority of the time occupied by the second phase.
> So, I suggest to parallel the second phase.
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