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Hudson commented on HDFS-8900: ------------------------------ FAILURE: Integrated in Hadoop-Mapreduce-trunk #2253 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2253/]) HDFS-8900. Compact XAttrs to optimize memory footprint. (yliu) (yliu: rev eee0d4563c62647cfaaed6605ee713aaf69add78) * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java * hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/XAttrStorage.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageFormatPBINode.java * hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestStartup.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirXAttrOp.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeDirectory.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/SerialNumberMap.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockStoragePolicySuite.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/SerialNumberManager.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/XAttrFeature.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java * hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestXAttrFeature.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/XAttrHelper.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/XAttrFormat.java * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/XAttrPermissionFilter.java * hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt * hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/JsonUtil.java > Compact XAttrs to optimize memory footprint. > -------------------------------------------- > > Key: HDFS-8900 > URL: https://issues.apache.org/jira/browse/HDFS-8900 > Project: Hadoop HDFS > Issue Type: Improvement > Components: namenode > Reporter: Yi Liu > Assignee: Yi Liu > Fix For: 2.8.0 > > Attachments: HDFS-8900.001.patch, HDFS-8900.002.patch, > HDFS-8900.003.patch, HDFS-8900.004.patch, HDFS-8900.005.patch > > > {code} > private final ImmutableList<XAttr> xAttrs; > {code} > Currently we use above in XAttrFeature, it's not efficient from memory point > of view, since {{ImmutableList}} and {{XAttr}} have object memory overhead, > and each object has memory alignment. > We can use a {{byte[]}} in XAttrFeature and do some compact in {{XAttr}}. -- This message was sent by Atlassian JIRA (v6.3.4#6332)