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https://issues.apache.org/jira/browse/PHOENIX-6698?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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jichen updated PHOENIX-6698:
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Description: {{{color:#1d1c1d}In our production environment, hive-phoenix
connector will take nearly 30-40 minutes to generate splits for large phoenix
table, which has more than 2048 regions.it is because in class
PhoenixInputFormat, function 'generateSplits' only uses one thread to generate
splits for each scan. My proposal is to use multi-thread to generate splits in
parallel. the proposal has been validated in our production environment.by
changing code {color}}}{color:#1d1c1d}to generate splits in parallel with 24
threads, the time cost is reduced to 2 minutes. {color} (was:
{{{color:#1d1c1d}In our production environment, hive-phoenix connector will
take nearly 30-40 minutes to generate splits for large phoenix table, the table
has more than 2048 regions.the performance will be worse if splitByStats is
enabled, it is because in class PhoenixInputFormat, function
'generateSplits' only uses one thread to generate splits for each scan. My
proposal is to use multi-thread to generate splits in parallel. the proposal
has been validated in our production environment.by changing code
{color}}}{color:#1d1c1d}to generate splits in parallel with 24 threads, the
time cost is reduced to 2 minutes. {color})
> hive-connector will take long time to generate splits for large phoenix
> tables.
> -------------------------------------------------------------------------------
>
> Key: PHOENIX-6698
> URL: https://issues.apache.org/jira/browse/PHOENIX-6698
> Project: Phoenix
> Issue Type: Improvement
> Components: hive-connector
> Affects Versions: 5.1.0
> Reporter: jichen
> Assignee: jichen
> Priority: Minor
> Fix For: connectors-6.0.0
>
>
> {{{color:#1d1c1d}In our production environment, hive-phoenix connector will
> take nearly 30-40 minutes to generate splits for large phoenix table, which
> has more than 2048 regions.it is because in class PhoenixInputFormat,
> function 'generateSplits' only uses one thread to generate splits for each
> scan. My proposal is to use multi-thread to generate splits in parallel. the
> proposal has been validated in our production environment.by changing code
> {color}}}{color:#1d1c1d}to generate splits in parallel with 24 threads, the
> time cost is reduced to 2 minutes. {color}
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