anmolanmol1234 commented on code in PR #8400:
URL: https://github.com/apache/hadoop/pull/8400#discussion_r3085893951
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hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/constants/ReadType.java:
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@@ -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
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