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Posted to common-issues@hadoop.apache.org by "Steve Loughran (Jira)" <ji...@apache.org> on 2022/04/28 15:10:12 UTC

[jira] [Created] (HADOOP-18218) make sure prefetching stream memory consumption scales

Steve Loughran created HADOOP-18218:
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             Summary: make sure prefetching stream memory consumption scales
                 Key: HADOOP-18218
                 URL: https://issues.apache.org/jira/browse/HADOOP-18218
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs/s3
    Affects Versions: 3.3.4
            Reporter: Steve Loughran


a recurrent problem in cloud store io is rrunning out of memory because blocks are buffered in reads or writes.

we need to make sure thaw data/memory is used in the prefetch code such that it works in processes with many worker threads (hive, spark....)



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