[GH-ISSUE #2112] Use FIO to generate smaller file, but file doesn't change #1076

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opened 2026-03-04 01:51:11 +03:00 by kerem · 1 comment

kerem commented

2026-03-04 01:51:11 +03:00

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Originally created by @huntersman on GitHub (Feb 17, 2023).
Original GitHub issue: https://github.com/s3fs-fuse/s3fs-fuse/issues/2112

Additional Information

Version of s3fs being used (`s3fs --version`)

V1.91

Version of fuse being used (`pkg-config --modversion fuse`, `rpm -qi fuse` or `dpkg -s fuse`)

2.9.2

Kernel information (`uname -r`)

5.4.213-1.el7.elrepo.x86_64

GNU/Linux Distribution, if applicable (`cat /etc/os-release`)

CentOS Linux 7

How to run s3fs, if applicable

s3fs test /root/test -o passwd_file=${HOME}/.passwd-s3fs -o url=http://xx.xx.xx.xx -o use_path_request_style -o noxmlns -o dbglevel=error -o default_acl=public-read -o logfile=/var/log/s3fs.log -o allow_other -o multireq_max=500 -o nocopyapi -o use_cache="/xxx/xxx/"

Details about issue

Use FIO write a file in the mount path

fio --name=sequential-write --directory=/root/test --rw=write --bs=4M --size=300m

Use FIO write again but with smaller file, file in the bucket is still 300 MB

fio --name=sequential-write --directory=/root/test --rw=write --bs=4M --size=100m

BTW, dd command can work as expected.

cd /root/test
dd if=/dev/zero of=test bs=1M count=300
dd if=/dev/zero of=test bs=1M count=100

Use dd command and file is finally 100 MB.

Originally created by @huntersman on GitHub (Feb 17, 2023). Original GitHub issue: https://github.com/s3fs-fuse/s3fs-fuse/issues/2112  ### Additional Information #### Version of s3fs being used (`s3fs --version`)  V1.91 #### Version of fuse being used (`pkg-config --modversion fuse`, `rpm -qi fuse` or `dpkg -s fuse`)  2.9.2 #### Kernel information (`uname -r`)  5.4.213-1.el7.elrepo.x86_64 #### GNU/Linux Distribution, if applicable (`cat /etc/os-release`)  CentOS Linux 7 #### How to run s3fs, if applicable  `s3fs test /root/test -o passwd_file=${HOME}/.passwd-s3fs -o url=http://xx.xx.xx.xx -o use_path_request_style -o noxmlns -o dbglevel=error -o default_acl=public-read -o logfile=/var/log/s3fs.log -o allow_other -o multireq_max=500 -o nocopyapi -o use_cache="/xxx/xxx/"` ### Details about issue  1. Use FIO write a file in the mount path ``` fio --name=sequential-write --directory=/root/test --rw=write --bs=4M --size=300m ``` 2. Use FIO write again but with smaller file, file in the bucket is still 300 MB ``` fio --name=sequential-write --directory=/root/test --rw=write --bs=4M --size=100m ``` BTW, `dd` command can work as expected. ``` cd /root/test dd if=/dev/zero of=test bs=1M count=300 dd if=/dev/zero of=test bs=1M count=100 ``` Use `dd` command and file is finally 100 MB.