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Posted to hdfs-issues@hadoop.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/12/30 08:24:00 UTC
[jira] [Work logged] (HDFS-16403) Improve FUSE IO performance by supporting FUSE parameter max_background
[ https://issues.apache.org/jira/browse/HDFS-16403?focusedWorklogId=702238&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-702238 ]
ASF GitHub Bot logged work on HDFS-16403:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 30/Dec/21 08:23
Start Date: 30/Dec/21 08:23
Worklog Time Spent: 10m
Work Description: cndaimin opened a new pull request #3842:
URL: https://github.com/apache/hadoop/pull/3842
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, 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.
To see whether it works:
# cat /sys/fs/fuse/connections/55/max_background
100
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Issue Time Tracking
-------------------
Worklog Id: (was: 702238)
Remaining Estimate: 0h
Time Spent: 10m
> 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: 10m
> 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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