[OpenAFS] Re: File creation delays

[John W. Sopko Jr.]

Moved my volume to another file server we run 1.4.11 on
all file servers. Got this error:


% mkdir try
mkdir: cannot create directory `try': No such device
% ls
cmdebug.txt  lark.txt  outfile

I can see the directory "try" from another client machine.

If I flush the volume, it shows up:

% fs flushv .
% ls
cmdebug.txt  lark.txt  outfile  try/



John W. Sopko Jr. wrote, On 3/17/2010 1:42 PM:
>
>
> 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