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Description of PR

JIRA: https://issues.apache.org/jira/browse/HADOOP-19622

Implementing ReadBufferManagerV2 as per the new design document.
Following capabilities are added to ReadBufferManager:

  1. Configurable minimum and maximum number of prefetch threads.
  2. Configurable minimum and maximum size of cached buffer pool
  3. Dynamically adjusting thread pool size and buffer pool size based on workload requirement and resource utilization but within the limits defined by user.
  4. Mapping prefetched data to file ETag so that multiple streams reading same file can share the cache and save TPS.

For more details on design doc please refer to the design doc attached to parent JIRA: https://issues.apache.org/jira/browse/HADOOP-19596

How was this patch tested?

TBA

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@github-actions github-actions bot added the build label Aug 4, 2025
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🎊 +1 overall

Vote Subsystem Runtime Logfile Comment
+0 🆗 reexec 0m 20s Docker mode activated.
_ Prechecks _
+1 💚 dupname 0m 0s No case conflicting files found.
+0 🆗 codespell 0m 0s codespell was not available.
+0 🆗 detsecrets 0m 0s detect-secrets was not available.
+1 💚 @author 0m 0s The patch does not contain any @author tags.
+1 💚 test4tests 0m 0s The patch appears to include 10 new or modified test files.
_ trunk Compile Tests _
+1 💚 mvninstall 27m 6s trunk passed
+1 💚 compile 0m 27s trunk passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚 compile 0m 25s trunk passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚 checkstyle 0m 23s trunk passed
+1 💚 mvnsite 0m 27s trunk passed
+1 💚 javadoc 0m 29s trunk passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚 javadoc 0m 23s trunk passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚 spotbugs 0m 48s trunk passed
+1 💚 shadedclient 21m 8s branch has no errors when building and testing our client artifacts.
-0 ⚠️ patch 21m 20s Used diff version of patch file. Binary files and potentially other changes not applied. Please rebase and squash commits if necessary.
_ Patch Compile Tests _
+1 💚 mvninstall 0m 21s the patch passed
+1 💚 compile 0m 20s the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚 javac 0m 20s the patch passed
+1 💚 compile 0m 18s the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚 javac 0m 18s the patch passed
+1 💚 blanks 0m 0s The patch has no blanks issues.
-0 ⚠️ checkstyle 0m 13s /results-checkstyle-hadoop-tools_hadoop-azure.txt hadoop-tools/hadoop-azure: The patch generated 2 new + 5 unchanged - 9 fixed = 7 total (was 14)
+1 💚 mvnsite 0m 19s the patch passed
+1 💚 javadoc 0m 19s the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚 javadoc 0m 17s the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚 spotbugs 0m 41s the patch passed
+1 💚 shadedclient 20m 31s patch has no errors when building and testing our client artifacts.
_ Other Tests _
+1 💚 unit 2m 24s hadoop-azure in the patch passed.
+1 💚 asflicense 0m 24s The patch does not generate ASF License warnings.
78m 58s
Subsystem Report/Notes
Docker ClientAPI=1.51 ServerAPI=1.51 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7832/20/artifact/out/Dockerfile
GITHUB PR #7832
JIRA Issue HADOOP-19622
Optional Tests dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname Linux 51751dc46640 5.15.0-143-generic #153-Ubuntu SMP Fri Jun 13 19:10:45 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool maven
Personality dev-support/bin/hadoop.sh
git revision trunk / 98902b0
Default Java Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
Multi-JDK versions /usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
Test Results https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7832/20/testReport/
Max. process+thread count 626 (vs. ulimit of 5500)
modules C: hadoop-tools/hadoop-azure U: hadoop-tools/hadoop-azure
Console output https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7832/20/console
versions git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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🎊 +1 overall

Vote Subsystem Runtime Logfile Comment
+0 🆗 reexec 0m 21s Docker mode activated.
_ Prechecks _
+1 💚 dupname 0m 0s No case conflicting files found.
+0 🆗 codespell 0m 1s codespell was not available.
+0 🆗 detsecrets 0m 1s detect-secrets was not available.
+1 💚 @author 0m 0s The patch does not contain any @author tags.
+1 💚 test4tests 0m 0s The patch appears to include 10 new or modified test files.
_ trunk Compile Tests _
+1 💚 mvninstall 27m 55s trunk passed
+1 💚 compile 0m 23s trunk passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚 compile 0m 24s trunk passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚 checkstyle 0m 19s trunk passed
+1 💚 mvnsite 0m 25s trunk passed
+1 💚 javadoc 0m 25s trunk passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚 javadoc 0m 19s trunk passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚 spotbugs 0m 42s trunk passed
+1 💚 shadedclient 22m 25s branch has no errors when building and testing our client artifacts.
-0 ⚠️ patch 22m 38s Used diff version of patch file. Binary files and potentially other changes not applied. Please rebase and squash commits if necessary.
_ Patch Compile Tests _
+1 💚 mvninstall 0m 18s the patch passed
+1 💚 compile 0m 19s the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚 javac 0m 19s the patch passed
+1 💚 compile 0m 17s the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚 javac 0m 17s the patch passed
+1 💚 blanks 0m 0s The patch has no blanks issues.
-0 ⚠️ checkstyle 0m 11s /results-checkstyle-hadoop-tools_hadoop-azure.txt hadoop-tools/hadoop-azure: The patch generated 6 new + 5 unchanged - 9 fixed = 11 total (was 14)
+1 💚 mvnsite 0m 19s the patch passed
+1 💚 javadoc 0m 16s the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚 javadoc 0m 16s the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚 spotbugs 0m 41s the patch passed
+1 💚 shadedclient 22m 23s patch has no errors when building and testing our client artifacts.
_ Other Tests _
+1 💚 unit 2m 29s hadoop-azure in the patch passed.
+1 💚 asflicense 0m 23s The patch does not generate ASF License warnings.
82m 20s
Subsystem Report/Notes
Docker ClientAPI=1.51 ServerAPI=1.51 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7832/21/artifact/out/Dockerfile
GITHUB PR #7832
JIRA Issue HADOOP-19622
Optional Tests dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname Linux 2dca3625cc19 5.15.0-143-generic #153-Ubuntu SMP Fri Jun 13 19:10:45 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool maven
Personality dev-support/bin/hadoop.sh
git revision trunk / c3acf96
Default Java Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
Multi-JDK versions /usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
Test Results https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7832/21/testReport/
Max. process+thread count 559 (vs. ulimit of 5500)
modules C: hadoop-tools/hadoop-azure U: hadoop-tools/hadoop-azure
Console output https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7832/21/console
versions git=2.25.1 maven=3.6.3 spotbugs=4.2.2
Powered by Apache Yetus 0.14.0 https://yetus.apache.org

This message was automatically generated.

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