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Support JNI Fuse touch command

See original GitHub issue

Alluxio Version: Alluxio master - 2.6.0-SNAPSHOT

Describe the bug Running touch command with JNI-Fuse mount point fails.

$touch /tmp/alluxio/fuseMount/a.file
touch: setting times of ‘/tmp/alluxio/fuseMount/a.file’: Function not implemented

Looks like JNI-Fuse need to support setattr operation to be able to get touch to work

To Reproduce

Create an Alluxio cluster
Create a fuse mount point fuseMount and grant permissions
Mount JNI-Fuse with integration/fuse/bin/alluxio-fuse mount fuseMount /
Run touch command against the mount point

Expected behavior Touch should succeed without exceptions

Urgency Not urgent

Additional context JNR-FUSE touch succeed without error

Issue Analytics

State:
Created 3 years ago
Comments:11 (11 by maintainers)

Top GitHub Comments

1reaction

LuQQiucommented, Apr 9, 2021

According to https://github.com/mafintosh/fuse-bindings/issues/30 It looks like three functions need to be implemented

truncate
utimens
chown

@maobaolong if you added utimens, we already have chown, then the only missing is truncate which we don’t support yet. A possible way is to try to implement truncate with alluxio read to a tmp file, delete the file, and write a new Alluxio file up to size. After that, we may be able to conclude that touch requires truncate or not. we can have a discussion about whether we want to support this low efficiency truncate method.

0reactions

maobaolongcommented, Apr 13, 2021

@apc999 @LuQQiu For this issue, it’s not caused by truncate, but caused by utimens, so I implements it to resolve this issue.