HADOOP-1593. [ABFS] Add vectored read support in ABFS driver by anmolanmol1234 · Pull Request #8400 · apache/hadoop

anmolanmol1234 · 2026-04-02T17:41:52Z

This PR introduces vectored read support in the Azure Blob File System (ABFS) driver to improve read performance for workloads that issue multiple small, non-contiguous read requests.

Vectored reads enable batching of multiple read ranges into fewer network calls, reducing request overhead and improving throughput—especially beneficial for analytics engines like Spark.

Current ABFS read implementation performs sequential, independent read operations for each requested range. This leads to:
Increased number of network calls
Higher latency for small/random reads
Inefficient utilization of bandwidth

Vectored I/O addresses these issues by coalescing multiple read requests into a single or fewer backend calls.

… HADOOP-15963_poc

hadoop-yetus · 2026-04-02T19:57:37Z

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Docker	ClientAPI=1.54 ServerAPI=1.54 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8400/1/artifact/out/Dockerfile
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hadoop-yetus · 2026-04-02T22:32:54Z

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anmolanmol1234 · 2026-04-03T09:13:13Z

============================================================
HNS-OAuth-DFS

[WARNING] Tests run: 228, Failures: 0, Errors: 0, Skipped: 2
[WARNING] Tests run: 858, Failures: 0, Errors: 0, Skipped: 172
[WARNING] Tests run: 170, Failures: 0, Errors: 0, Skipped: 8
[WARNING] Tests run: 272, Failures: 0, Errors: 0, Skipped: 23

============================================================
HNS-SharedKey-DFS

[WARNING] Tests run: 228, Failures: 0, Errors: 0, Skipped: 3
[WARNING] Tests run: 861, Failures: 0, Errors: 0, Skipped: 118
[WARNING] Tests run: 170, Failures: 0, Errors: 0, Skipped: 8
[WARNING] Tests run: 272, Failures: 0, Errors: 0, Skipped: 10

============================================================
AppendBlob-HNS-OAuth-DFS

[WARNING] Tests run: 228, Failures: 0, Errors: 0, Skipped: 2
[WARNING] Tests run: 858, Failures: 0, Errors: 0, Skipped: 183
[WARNING] Tests run: 147, Failures: 0, Errors: 0, Skipped: 9
[WARNING] Tests run: 272, Failures: 0, Errors: 0, Skipped: 23

============================================================
NonHNS-SharedKey-Blob

[WARNING] Tests run: 228, Failures: 0, Errors: 0, Skipped: 9
[WARNING] Tests run: 708, Failures: 0, Errors: 0, Skipped: 143
[WARNING] Tests run: 170, Failures: 0, Errors: 0, Skipped: 3
[WARNING] Tests run: 272, Failures: 0, Errors: 0, Skipped: 11

============================================================
NonHNS-OAuth-Blob

[ERROR] org.apache.hadoop.fs.azurebfs.services.TestAbfsInputStream.testAdaptiveInputStream -- Time elapsed: 1.795 s <<< FAILURE!

[ERROR] Tests run: 228, Failures: 1, Errors: 0, Skipped: 9
[WARNING] Tests run: 705, Failures: 0, Errors: 0, Skipped: 155
[WARNING] Tests run: 170, Failures: 0, Errors: 0, Skipped: 3
[WARNING] Tests run: 272, Failures: 0, Errors: 0, Skipped: 24

============================================================
AppendBlob-NonHNS-OAuth-Blob

[WARNING] Tests run: 228, Failures: 0, Errors: 0, Skipped: 9
[WARNING] Tests run: 700, Failures: 0, Errors: 0, Skipped: 176
[WARNING] Tests run: 147, Failures: 0, Errors: 0, Skipped: 4
[WARNING] Tests run: 272, Failures: 0, Errors: 0, Skipped: 24

============================================================
HNS-Oauth-DFS-IngressBlob

[WARNING] Tests run: 228, Failures: 0, Errors: 0, Skipped: 2
[WARNING] Tests run: 732, Failures: 0, Errors: 0, Skipped: 181
[WARNING] Tests run: 170, Failures: 0, Errors: 0, Skipped: 8
[WARNING] Tests run: 272, Failures: 0, Errors: 0, Skipped: 23

hadoop-yetus · 2026-04-03T11:17:07Z

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hadoop-yetus · 2026-04-06T11:58:54Z

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hadoop-yetus · 2026-04-06T12:02:03Z

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hadoop-yetus · 2026-04-06T13:31:25Z

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hadoop-yetus · 2026-04-06T14:05:00Z

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			_ Other Tests _
+1 💚	unit	2m 9s		hadoop-azure in the patch passed.
+1 💚	asflicense	0m 35s		The patch does not generate ASF License warnings.
		149m 33s

Subsystem	Report/Notes
Docker	ClientAPI=1.54 ServerAPI=1.54 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8400/5/artifact/out/Dockerfile
GITHUB PR	#8400
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient codespell detsecrets xmllint spotbugs checkstyle
uname	Linux bcec24f39c71 5.15.0-164-generic #174-Ubuntu SMP Fri Nov 14 20:25:16 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / `4f8f755`
Default Java	Ubuntu-17.0.18+8-Ubuntu-124.04.1
Multi-JDK versions	/usr/lib/jvm/java-21-openjdk-amd64:Ubuntu-21.0.10+7-Ubuntu-124.04 /usr/lib/jvm/java-17-openjdk-amd64:Ubuntu-17.0.18+8-Ubuntu-124.04.1
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8400/5/testReport/
Max. process+thread count	570 (vs. ulimit of 10000)
modules	C: hadoop-tools/hadoop-azure U: hadoop-tools/hadoop-azure
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8400/5/console
versions	git=2.43.0 maven=3.9.11 spotbugs=4.9.7
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anmolanmol1234 added 22 commits January 16, 2026 04:30

vectored read config changes

8c28b18

Vectored read code

08617b7

Fix tests

95cbb73

Made changes for inprogress list

d03d3cd

Merge branch 'trunk' of https://github.com/anmolanmol1234/hadoop into…

1e62df3

… HADOOP-15963_poc

Merge conflicts

3f36997

Checkstyle fix

c4313e9

Merge branch 'trunk' of https://github.com/anmolanmol1234/hadoop into…

5043c90

… HADOOP-15963_poc

Fix checkstyle

0106fc1

Fix checkstyle

1430b4a

Add explanations

0927ca1

Add debug log statements

08ca94a

Checkstyle fixes

02834ef

Merge branch 'trunk' of https://github.com/anmolanmol1234/hadoop into…

64e5da6

… HADOOP-15963_poc

Merge branch 'trunk' of https://github.com/anmolanmol1234/hadoop into…

eb52c29

… HADOOP-15963_poc

fix null issue

1ea571e

Fix vectored read

279e7f4

Merge branch 'trunk' of https://github.com/anmolanmol1234/hadoop into…

7de0740

… HADOOP-15963_poc

Merge branch 'trunk' of https://github.com/anmolanmol1234/hadoop into…

7c46352

… HADOOP-15963_poc

range validation fixes

25fa821

fix issues

5b2632a

Fix checkstyle

437ffc8

github-actions bot added trunk TOOLS ABFS labels Apr 2, 2026

fix checkstyle

975bf73

mukund-thakur self-requested a review April 2, 2026 21:20

fix checkstyle failures

ba7c9ff

github-actions bot added the build label Apr 3, 2026

anmolanmol1234 added 3 commits April 6, 2026 04:16

Add minor fixes

e7bf14a

fix issues

4f8f755

revert slow commands

9df8272

fix for direct buffer

12b69dc

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HADOOP-1593. [ABFS] Add vectored read support in ABFS driver #8400

HADOOP-1593. [ABFS] Add vectored read support in ABFS driver #8400
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anmolanmol1234 commented Apr 3, 2026 •

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============================================================ HNS-OAuth-DFS

============================================================ HNS-SharedKey-DFS

============================================================ AppendBlob-HNS-OAuth-DFS

============================================================ NonHNS-SharedKey-Blob

============================================================ NonHNS-OAuth-Blob

============================================================ AppendBlob-NonHNS-OAuth-Blob

============================================================ HNS-Oauth-DFS-IngressBlob

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anmolanmol1234 commented Apr 3, 2026 •

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============================================================
HNS-OAuth-DFS

============================================================
HNS-SharedKey-DFS

============================================================
AppendBlob-HNS-OAuth-DFS

============================================================
NonHNS-SharedKey-Blob

============================================================
NonHNS-OAuth-Blob

============================================================
AppendBlob-NonHNS-OAuth-Blob

============================================================
HNS-Oauth-DFS-IngressBlob