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https://issues.apache.org/jira/browse/IMPALA-8495?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex Rodoni closed IMPALA-8495.
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Resolution: Fixed
Fix Version/s: Impala 3.3.0
> Impala Doc: Document Data Read Cache
> ------------------------------------
>
> Key: IMPALA-8495
> URL: https://issues.apache.org/jira/browse/IMPALA-8495
> Project: IMPALA
> Issue Type: Task
> Components: Docs
> Affects Versions: Impala 3.3.0
> Reporter: Michael Ho
> Assignee: Alex Rodoni
> Priority: Major
> Labels: future_release_doc, in_33
> Fix For: Impala 3.3.0
>
>
> IMPALA-8341 introduces a data cache for remote reads. In particular, it
> caches data for non-local reads (e.g. S3, ABFS, ADLS). The data cache can be
> enabled setting the startup flag
> {{--data_cache=<dir1>,<dir2>,...,<dirN>:<quota>}} in which
> {{<dir1>,...,<dirN>}} are directories on local filesystem and {{quota}} is
> the storage consumption quota for each directory. Note that multiple Impala
> daemons running on the same host *must not* share cache directories.
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