[HDFS-16403] Improve FUSE IO performance by supporting FUSE parameter max_background

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.3.0, 3.3.1
• Fix Version/s: 3.4.0, 3.2.4, 3.3.5
• Component/s: fuse-dfs
• Labels: pull-request-available
• Assignee: daimin
• Reporter: daimin
• Created: 30/Dec/21 08:15
• Updated: 12/Jul/22 10:40
• Resolved: 25/Jan/22 05:07

Description

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.

Issue Links

• links to: GitHub Pull Request #3842