[Bug 197336] find command cannot see more than 32765 subdirectories when using ZFS
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bugzilla-noreply at freebsd.org
Wed Feb 4 23:19:51 UTC 2015
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197336
Bug ID: 197336
Summary: find command cannot see more than 32765 subdirectories
when using ZFS
Product: Base System
Version: 10.1-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: bin
Assignee: freebsd-bugs at FreeBSD.org
Reporter: wdormann at gmail.com
Created attachment 152566
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=152566&action=edit
python script to generate a bunch of subdirectories with files in them
When a directory has more than 32765 subdirectories in it, the find command
fails to find all of the contents if the find command is executed in a ZFS
filesystem.
If the same command is executed in another filesystem that FreeBSD supports
that also supports large counts of subdirectories, the find command sees
everything. I've confirmed the correct behavior with both Reiserfs and
unionfs. So it appears to be something about the interaction between find and
ZFS that triggers the bug.
Steps to reproduce:
1. Create a directory structure using the attached dirgen.py script
2. Verify the file count with the ls command. e.g.: ls -lR find_test_q65puW |
egrep "txt$" | wc -l
3. Verify the file count with the find command. e.g.: find find_test_q65puW
-name "*.txt" | wc -l
Actual results:
[~/test]$ python ./dirgen.py
ndirs: 300000 nfiles: 300000
[~/test]$ ls -l
total 219058
-rw-r--r-- 1 user user 861 Feb 4 15:30 dirgen.py
drwx------ 32767 user user 300002 Feb 4 15:31 find_test_q65puW
[~/test]$ ls -lR find_test_q65puW | egrep "txt$" | wc -l
300000
[~/test]$ find find_test_q65puW -name "*.txt" | wc -l
32765
The count is not complete. (32765 instead of 300000)
Expected results:
The find command should indicate that there are 300000 files.
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