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https://issues.apache.org/jira/browse/HDFS-14202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16742052#comment-16742052
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Ranith Sardar edited comment on HDFS-14202 at 1/14/19 1:17 PM:
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In DiskBalancer#copyBlocks method, "timeUsed" is calculated in nanoseconds.
{code:java}
long begin = System.nanoTime();
this.dataset.moveBlockAcrossVolumes(block, dest);
long now = System.nanoTime();
timeUsed = (now - begin) > 0 ? now - begin : 0;{code}
Then, timeUsed has been used in computedelay.
{code:java}
Thread.sleep(computeDelay(block.getNumBytes(), timeUsed, item));{code}
But, Computedelay() is expecting in Milliseconds acc to the code.
{code:java}
* @param timeUsed in milliseconds{code}
Need to change milliseconds to nanoseconds.
was (Author: ranith):
In DiskBalancer#copyBlocks method, "timeUsed" is calculated in nanoseconds.
{code:java}
long begin = System.nanoTime();
this.dataset.moveBlockAcrossVolumes(block, dest);
long now = System.nanoTime();
timeUsed = (now - begin) > 0 ? now - begin : 0;{code}
Then, timeUsed has been used in computedelay.
{code:java}
Thread.sleep(computeDelay(block.getNumBytes(), timeUsed, item));{code}
But, Computedelay() is expecting in Milliseconds acc to the code.
{code:java}
* @param timeUsed in milliseconds{code}
> "dfs.disk.balancer.max.disk.throughputInMBperSec" property is not working as
> per set value.
> -------------------------------------------------------------------------------------------
>
> Key: HDFS-14202
> URL: https://issues.apache.org/jira/browse/HDFS-14202
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: diskbalancer
> Affects Versions: 3.0.1
> Reporter: Ranith Sardar
> Assignee: Ranith Sardar
> Priority: Major
> Attachments: HDFS-14202.001.patch
>
>
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