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Posted to issues@impala.apache.org by "Michael Ho (JIRA)" <ji...@apache.org> on 2019/05/04 15:25:00 UTC

[jira] [Created] (IMPALA-8495) Impala Doc: Document Data Read Cache

Michael Ho created IMPALA-8495:
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             Summary: 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


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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