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https://issues.apache.org/jira/browse/HDFS-16403?focusedWorklogId=708531&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-708531
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ASF GitHub Bot logged work on HDFS-16403:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 13/Jan/22 17:50
Start Date: 13/Jan/22 17:50
Worklog Time Spent: 10m
Work Description: fapifta commented on pull request #3842:
URL: https://github.com/apache/hadoop/pull/3842#issuecomment-1012369266
@jojochuang I did not have the time so far to thoroughly go through the
linked paper, or test out the new code, but for the first sight, the option
seems to be reasonable, and it seems to be added properly. For more extensive
testing, I might have some time next week, but so far I can not promise it.
Overall, the finding looks promising, and the implementation itself seems to be
seamless with the related part of the code, so I am brave enough to say that I
am fine with committing it.
@cndaimin Can you share some details about your test results? I guess you
have some measures with the implementation, is it something you can share? I
would be curious what gains you can get with more threads, and if and where the
gain is getting less and less when one adds more background threads.
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Issue Time Tracking
-------------------
Worklog Id: (was: 708531)
Time Spent: 2h 40m (was: 2.5h)
> Improve FUSE IO performance by supporting FUSE parameter max_background
> -----------------------------------------------------------------------
>
> Key: HDFS-16403
> URL: https://issues.apache.org/jira/browse/HDFS-16403
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: fuse-dfs
> Affects Versions: 3.3.0, 3.3.1
> Reporter: daimin
> Assignee: daimin
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> When we examining the FUSE IO performance on HDFS, we found that the
> simultaneous IO requests number are limited to a fixed number, like 12. This
> limitation makes the IO performance on FUSE client quite unacceptable. We did
> some research on this and inspired by the article [Performance and Resource
> Utilization of FUSE User-Space File
> Systems|https://dl.acm.org/doi/fullHtml/10.1145/3310148], clearly the FUSE
> parameter '{{{}max_background{}}}' decides the simultaneous IO requests
> number, which is 12 by default.
> We add 'max_background' to fuse_dfs mount options, the FUSE kernel will take
> effect when an option value is given.
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