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https://issues.apache.org/jira/browse/HDFS-6930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14156393#comment-14156393
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Hudson commented on HDFS-6930:
------------------------------
FAILURE: Integrated in Hadoop-Hdfs-trunk #1889 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1889/])
HDFS-6930. Improve replica eviction from RAM disk. (Arpit Agarwal) (arp: rev
cb9b485075ce773f2d6189aa2f54bbc69aad4dab)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-6581.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/LazyWriteReplicaTracker.java
> Improve replica eviction from RAM disk
> --------------------------------------
>
> Key: HDFS-6930
> URL: https://issues.apache.org/jira/browse/HDFS-6930
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Affects Versions: HDFS-6581
> Reporter: Arpit Agarwal
> Assignee: Arpit Agarwal
> Fix For: 3.0.0
>
> Attachments: HDFS-6930.01.patch, HDFS-6930.02.patch
>
>
> The current replica eviction scheme is inefficient since it performs multiple
> file operations in the context of block allocation.
> A better implementation would be asynchronous eviction when free space on RAM
> disk falls below a low watermark to make block allocation faster.
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