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https://issues.apache.org/jira/browse/HADOOP-1593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18073723#comment-18073723
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ASF GitHub Bot commented on HADOOP-1593:
----------------------------------------
anmolanmol1234 commented on code in PR #8400:
URL: https://github.com/apache/hadoop/pull/8400#discussion_r3085893951
##########
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/constants/ReadType.java:
##########
@@ -48,6 +48,16 @@ public enum ReadType {
* Only triggered when small file read optimization kicks in.
*/
SMALLFILE_READ("SR"),
+ /**
+ * Read multiple disjoint ranges from the storage service using vectored
reads.
+ * Used to coalesce and execute non-contiguous reads efficiently.
+ */
+ VECTORED_READ("VR"),
+ /**
+ * Performs a vectored direct read by fetching multiple non-contiguous
+ * ranges in a single operation.
+ */
+ VECTORED_DIRECT_READ("VDR"),
Review Comment:
Here this direct read is when we are not able to queue a vectored read in
the read ahead queue due to read ahead buffers not being available, we do a
direct readRemote call
> FsShell should work with paths in non-default FileSystem
> --------------------------------------------------------
>
> Key: HADOOP-1593
> URL: https://issues.apache.org/jira/browse/HADOOP-1593
> Project: Hadoop Common
> Issue Type: New Feature
> Components: fs
> Reporter: Doug Cutting
> Assignee: Mahadev Konar
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.17.0
>
> Attachments: patch_1593.patch, patch_1593_1.patch
>
>
> If the default filesystem is, e.g., hdfs://foo:8888/, one should still be
> able to do 'bin/hadoop fs -ls hdfs://bar:9999/' or 'bin/hadoop fs -ls
> s3://cutting/foo'. Currently these generate a filesystem mismatch exception.
> This is because FsShell assumes that all paths are in the default
> FileSystem. Rather, the default filesystem should only be used for paths
> that do not specify a FileSystem. This would easily be accomplished by using
> Path#getFileSystem().
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