[
https://issues.apache.org/jira/browse/HADOOP-19559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18039818#comment-18039818
]
ASF GitHub Bot commented on HADOOP-19559:
-----------------------------------------
ahmarsuhail commented on PR #8095:
URL: https://github.com/apache/hadoop/pull/8095#issuecomment-3562520696
I don't think we should try and fixing these tests, instead always run them
with the classic input stream. Most of them assert behaviour which does not
apply to AAL (eg: the readAhead value, stream draining, or thread context
stats).
What I will do as a follow up is look at which ones make sense to have as
part of a new ITest for AAL. Similar to what we did for the prefetching input
stream. I will make those changes as part of our
https://github.com/apache/hadoop/pull/7923.
Merging this for now and will backport, so if you kick of a 3.4.3 run this
weekend we can catch any issues early.
> S3A: Analytics accelerator for S3 to be enabled by default
> ----------------------------------------------------------
>
> Key: HADOOP-19559
> URL: https://issues.apache.org/jira/browse/HADOOP-19559
> Project: Hadoop Common
> Issue Type: New Feature
> Components: fs/s3
> Affects Versions: 3.5.0, 3.4.2
> Reporter: Ahmar Suhail
> Priority: Major
> Labels: pull-request-available
>
> Make "analytics" the default input stream in S3A.
> Goals
> * Parquet performance through applications running queries over the data
> (spark etc)
> * Performance for other formats good as/better than today. Examples: avro
> manifests in iceberg, ORC in hive/spark
> * Performance for other uses as good as today (whole-file/sequential reads of
> parquet data in distcp etc)
> * better resilience to bad uses (incomplete reads not retaining http streams,
> buffer allocations on long-retained data)
> * efficient on applications like Impala, which caches parquet footers itself,
> and uses unbuffer() to discard all stream-side resources. Maybe just throw
> alway all state on unbuffer() and stop trying to be sophisticated, or support
> some new openFile flag which can be used to disable footer parsing
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
