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https://issues.apache.org/jira/browse/HDFS-4635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13613660#comment-13613660
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Tsz Wo (Nicholas), SZE commented on HDFS-4635:
----------------------------------------------
TestGSet failed by the round off error in TestGSet.isPowerOfTwo(..): 2^29 =
536870912 but isPowerOfTwo(536870912) = false. We may fix it as below.
{code}
private static boolean isPowerOfTwo(int num) {
if (num == 0) {
return true;
}
return num > 0 && Integer.bitCount(num) == 1;
}
{code}
> Move BlockManager#computeCapacity to LightWeightGSet
> ----------------------------------------------------
>
> Key: HDFS-4635
> URL: https://issues.apache.org/jira/browse/HDFS-4635
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Attachments: HDFS-4635.patch, HDFS-4635.patch
>
>
> The computeCapacity in BlockManager that calculates the LightWeightGSet
> capacity as the percentage of total JVM memory should be moved to
> LightWeightGSet. This helps in other maps that are based on the GSet to make
> use of the same functionality.
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