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  1. Hadoop HDFS
  2. HDFS-15570

Hadoop Erasure Coding ISA-L Check Request..

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    Details

    • Type: Test
    • Status: Resolved
    • Priority: Trivial
    • Resolution: Fixed
    • Affects Version/s: 3.2.1
    • Fix Version/s: 3.2.1
    • Labels:
      None
    • Environment:

      -OS Version : CentOS Linux release 8.0.1905 (Core)

      -Hadoop Version : hadoop-3.2.1

       

    • Target Version/s:

      Description

      I am testing the performance of erasure coding in Hadoop 3.2.1 version environment.
      Apply ISA-L by referring to the manual (https://hadoop.apache.org/docs/r3.2.1/hadoop-project-dist/hadoop-hdfs/HDFSErasureCoding.html)

      ▶ JOB LIST (Proceed in manual order)

      1.  ISA-L library installed on all servers
        ld ISA-L library : https://github.com/01org/isa-l
      2.  hadoop build source (hadoop-3.2.1-src.tar.gz / mvn package -Pdist,native -Dtar -Drequire.isal -Drequire.snappy)
      3.  Deploy the built hadoop-3.2.1 folder to all servers

      But In Test (File upload Time/Select Orc table in Hive)
      There is no improvement in performance when tested.
      Ask for advice on work

      [Question 1]
      Is there anything wrong with the installation? Are there any missing tasks?
      [Question 2]
      Why doesn't it speed up ? (File upload Time/Select Orc table in Hive)

      [Question 3]
      Whether to use ISA-L in Hadoop, How to check?

       ※ When I used the "hdfs ec -listCodecs" command, I expected to see ISA-L. But no 

      ※ The warn log that occurs before applying ISA-L is It no longer occurs.
      ----------------------------------------------
      WARN org.apache.hadoop.io.erasurecode.ErasureCodeNative: ISA-L support is not available in your platform... using builtin-java codec where applicable
      ----------------------------------------------

       

      ▶Reference information

      =======================================

      -CPU INFO (namenode :2  / datanode : 5)
      ---------------------------------------------
      namenode cpu : Intel(R) Xeon(R) CPU E5-2609 v2 @ 2.50GHz
      datanode cpu : Intel(R) Xeon(R) CPU E5620 @ 2.40GHz
      ---------------------------------------------

      -hadoop checknative (After source build)
      ---------------------------------------------
      Native library checking:
      hadoop: true /nds/hadoop-3.2.1/lib/native/libhadoop.so.1.0.0
      zlib: true /lib64/libz.so.1
      zstd : false
      snappy: true /lib64/libsnappy.so.1
      lz4: true revision:10301
      bzip2: false
      openssl: true /lib64/libcrypto.so
      ISA-L: true /lib64/libisal.so.2
      ---------------------------------------------

      -hdfs ec -listCodecs
      Erasure Coding Codecs: Codec [Coder List]
      RS [RS_NATIVE, RS_JAVA]
      RS-LEGACY [RS-LEGACY_JAVA]
      XOR [XOR_NATIVE, XOR_JAVA]

      =======================================

       

       

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            • Assignee:
              Unassigned
              Reporter:
              isurika isurika
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              Dates

              • Created:
                Updated:
                Resolved: