[lustre-discuss] llapi_file_open() messages to stderr
John Bauer
bauerj at iodoctors.com
Sat Apr 30 11:44:37 PDT 2016
Dennis
Thanks for the response. There are other reasons I want to suppress
these messages.
1) I am trying to minimize system calls.
2) It's kind of overkill for llapi_file_open() to print to stderr. The
function already returns -1 with errno=EEXIST. Shouldn't it be up to the
caller to decide if a message should be printed.
3) There are other messages, different than the *stripe already set*,
that I also would like to suppress. Most notably "*Invalid argument*".
I hate to think that I have to check validity of all the striping
arguments to prevent the messages to stderr. I'll also point that even
*lfs setstripe* doesn't even go to the trouble to tell you which
argument is invalid.
% lfs setstripe -c 486 -i 45 file.dat
error on ioctl 0x4008669a for 'file.dat' (3): Invalid argument
error: setstripe: create stripe file 'file.dat' failed
%
John
On 4/30/2016 12:27 PM, Dennis Nelson wrote:
> Check for existing files before making the call? And don't issue the
> call if the file exists. You cannot change stripe attributes on an
> existing file.
>
> Sent from my iPhone
>
> On Apr 30, 2016, at 11:51 AM, John Bauer <bauerj at iodoctors.com
> <mailto:bauerj at iodoctors.com>> wrote:
>
>> I am implementing the use of*llapi_file_open()* in my I/O library so
>> I can set the striping. If the file already exists I get the
>> following message on stderr:
>>
>> *error on ioctl 0x4008669a for 'dd.dat' (4): stripe already set*
>>
>> Is there some way to suppress this message? The end-uers of my
>> library will get these messages in stderr of their job and will
>> likely have no clue as to why. My library detects the failed
>> llapi_file_open() and retrys with open64() and spits out its own
>> error message to the library's log.
>>
>> Thanks
>>
>> John
>> --
>> I/O Doctors, LLC
>> 507-766-0378
>> bauerj at iodoctors.com
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--
I/O Doctors, LLC
507-766-0378
bauerj at iodoctors.com
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