[OpenAFS] Re: File creation delays

[John W. Sopko Jr.]

Andrew Deason wrote, On 3/17/2010 11:06 AM:
> On Wed, 17 Mar 2010 08:03:37 -0400
> "John W. Sopko Jr."<sopko@cs.unc.edu>  wrote:
>
>> Below is an example of creating a directory in AFS that took 15
>> seconds. The removal and next mkdir work fine. Below that is strace
>> output of the mkdir command and where it is hanging.
>>
>> % date; mkdir try; date
>> Wed Mar 17 06:37:18 EDT 2010
>> Wed Mar 17 06:37:33 EDT 2010
>
> Is there anything in FileLog around this time, possibly about failing to
> break callbacks on a certain host?

No clues, one of the first places I looked.

>
> (by the way, 'time mkdir try' is convenient for showing delay in
> something like this)

Yes, I have used the time command before, thanks.

> >> Output from strace, last few lines:
>>
>> % strace mkdir try
>
> Also, 'strace -tt mkdir try' is convenient for showing delays.
>

Thanks, here is a sample with "strace -tt mkdir try", a little
over 15 second delay:

13:35:33.597167 mkdir("try", 0777)      = 0
13:35:48.617766 close(1)                = 0
13:35:48.617820 exit_group(0)           = ?

I am going to move my home volume to another file server
and see if that helps.

-- 
John W. Sopko Jr.               University of North Carolina
email: sopko AT cs.unc.edu      Computer Science Dept., CB 3175
Phone: 919-962-1844             Fred Brooks Building; Room 140
Fax:   919-962-1799             Chapel Hill, NC 27599-3175