[Ocfs2-devel] question of dentry number

[Ocfs2-devel] question of dentry number

[Coly Li]

I observer interesting dentry number during the dlm stress testing. The ocfs2
cluster stack is user space "pcmk".

creating a empty directory, ls -al:
total 8
drwxr-xr-x 2 root root 4096 2009-05-08 15:29 .
drwxr-xr-x 4 root root 4096 2009-05-08 15:29 ..


run script make_panic on single node, for 10 seconds, ls -al:
total 12
drwxr-xr-x 2 root root      4096 2009-05-08 15:33 .
drwxr-xr-x 4 root root      4096 2009-05-08 15:29 ..
-rw-r--r-- 1 root root         0 2009-05-08 15:33 file0000000001
-rw-r--r-- 1 root root 459611068 2009-05-08 15:33 file0000000003

then run this script on ocfs2 volume of both nodes for 10 seconds, ls -al:
total 32
drwxr-xr-x 2 root root      4096 2009-05-08 15:34 .
drwxr-xr-x 4 root root      4096 2009-05-08 15:29 ..
-rw-r--r-- 1 root root 939787135 2009-05-08 15:34 file0000000000
-rw-r--r-- 1 root root 922127231 2009-05-08 15:34 file0000000001
-rw-r--r-- 1 root root         0 2009-05-08 15:34 file0000000002
-rw-r--r-- 1 root root 503703844 2009-05-08 15:34 file0000000003

I don't understand how there are 32 dentries in the directory. Can anybody tell
me the magic ? Or it's a bug.

Thanks.
-- 
Coly Li
SuSE Labs

[Ocfs2-devel] question of dentry number

[Joel Becker]

On Fri, May 08, 2009 at 03:28:35PM +0800, Coly Li wrote:
> then run this script on ocfs2 volume of both nodes for 10 seconds, ls -al:
> total 32
> drwxr-xr-x 2 root root      4096 2009-05-08 15:34 .
> drwxr-xr-x 4 root root      4096 2009-05-08 15:29 ..
> -rw-r--r-- 1 root root 939787135 2009-05-08 15:34 file0000000000
> -rw-r--r-- 1 root root 922127231 2009-05-08 15:34 file0000000001
> -rw-r--r-- 1 root root         0 2009-05-08 15:34 file0000000002
> -rw-r--r-- 1 root root 503703844 2009-05-08 15:34 file0000000003
> 
> I don't understand how there are 32 dentries in the directory. Can anybody tell
> me the magic ? Or it's a bug.
> 

	total is the number of directory blocks.

Joel

> -- 
> Coly Li
> SuSE Labs
> 
> _______________________________________________
> Ocfs2-devel mailing list
> Ocfs2-devel at oss.oracle.com
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-- 

Life's Little Instruction Book #109

	"Know how to drive a stick shift."

Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127

[Ocfs2-devel] question of dentry number

[Coly Li]

Joel Becker Wrote:
> On Fri, May 08, 2009 at 03:28:35PM +0800, Coly Li wrote:
>> then run this script on ocfs2 volume of both nodes for 10 seconds, ls -al:
>> total 32
>> drwxr-xr-x 2 root root      4096 2009-05-08 15:34 .
>> drwxr-xr-x 4 root root      4096 2009-05-08 15:29 ..
>> -rw-r--r-- 1 root root 939787135 2009-05-08 15:34 file0000000000
>> -rw-r--r-- 1 root root 922127231 2009-05-08 15:34 file0000000001
>> -rw-r--r-- 1 root root         0 2009-05-08 15:34 file0000000002
>> -rw-r--r-- 1 root root 503703844 2009-05-08 15:34 file0000000003
>>
>> I don't understand how there are 32 dentries in the directory. Can anybody tell
>> me the magic ? Or it's a bug.
>>
> 
> 	total is the number of directory blocks.
> 
mixed with link reference number, brain short dot...

-- 
Coly Li
SuSE Labs