[
https://issues.apache.org/jira/browse/HADOOP-19767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18050581#comment-18050581
]
ASF GitHub Bot commented on HADOOP-19767:
-----------------------------------------
manika137 commented on code in PR #8153:
URL: https://github.com/apache/hadoop/pull/8153#discussion_r2671805850
##########
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/constants/FileSystemConfigurations.java:
##########
@@ -416,7 +418,7 @@ public final class FileSystemConfigurations {
public static final boolean DEFAULT_FS_AZURE_ENABLE_CREATE_BLOB_IDEMPOTENCY
= true;
- public static final boolean
DEFAULT_FS_AZURE_ENABLE_PREFETCH_REQUEST_PRIORITY = true;
+ public static final boolean
DEFAULT_FS_AZURE_ENABLE_PREFETCH_REQUEST_PRIORITY = false;
Review Comment:
we dont require to disable it I think. We only add the request header if the
read type is set to prefetch
> ABFS: [Read] Introduce Abfs Input Policy for detecting read patterns
> --------------------------------------------------------------------
>
> Key: HADOOP-19767
> URL: https://issues.apache.org/jira/browse/HADOOP-19767
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/azure
> Affects Versions: 3.4.2
> Reporter: Anuj Modi
> Assignee: Anuj Modi
> Priority: Major
> Labels: pull-request-available
>
> Since the onset of ABFS Driver, there has been a single implementation of
> AbfsInputStream. Different kinds of workloads require different heuristics to
> give the best performance for that type of workload. For example:
> # Sequential Read Workloads like DFSIO and DistCP gain performance
> improvement from prefetched
> # Random Read Workloads on other hand do not need Prefetches and enabling
> prefetches for them is an overhead and TPS heavy
> # Query Workloads involving Parquet/ORC files benefit from improvements like
> Footer Read and Small Files Reads
> To accomodate this we need to determine the pattern and accordingly create
> Input Streams implemented for that particular pattern.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
