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https://issues.apache.org/jira/browse/HDFS-16403?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang resolved HDFS-16403.
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Resolution: Fixed
Thank you [~cndaimin] for the great work and the excellent performance test!
Thanks [~pifta] for the code review.
> 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
> Fix For: 3.4.0, 3.2.3, 3.3.3
>
> Time Spent: 3.5h
> 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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