[Pvfs2-developers] fs.conf integrity checks

[Rob Ross]

Sounds like a fine solution. Maybe could be integrated with the hints 
that Julian wants to add (I know that complicates things a bit, but it 
*is* a hint after all...)?

Rob

Murali Vilayannur wrote:
> Hi Rob,
> hehe :)
> Alright, I will change it then..
> Just had a quick chat with Sam and RobL about this..
> Are you ok with having a flag to the isys_fs_add and fs_add API that
> determines whether or not we should do these checks and have ping set the
> flag to 1 and client-core set to 0?
> thanks,
> Murali
> 
> 
> On Tue, 12 Sep 2006, Rob Ross wrote:
> 
>> 80K clients...
>>
>> Murali Vilayannur wrote:
>>> Hi Rob,
>>>
>>>> Quick uneducated question: this isn't automatically done on *every*
>>>> mount, right?
>>> yeah, it is done automatically on every *new* mount upcall. Is this a
>>> problem? (I changed the code to  this behavior y'day night)
>>> thanks,
>>> Murali
>>>
>>>> Rob
>>>>
>>>> Phil Carns wrote:
>>>>> Murali Vilayannur wrote:
>>>>>> Hi All,
>>>>>> Just a heads-up..
>>>>>> I have checked in a patch that will allow the pvfs2-ping utility to
>>>>>> verify
>>>>>> if the fs.conf files obtained from all the servers for a given fsid
>>>>>> is the same by checking against their crypto check sum (SHA1 right now)
>>>>>> Please let me know if you have any serious objections to doing it the way
>>>>>> I have done right now..
>>>>>> Thanks,
>>>>>> Murali
>>>>> Hi Murali,
>>>>>
>>>>> This is integrated into fs_add so that the test is performed
>>>>> automatically at mount time now, correct?  We had done something similar
>>>>> in the pvfs2-validate utility, but I think it will be good to have it
>>>>> integrated into the normal mount process.
>>>>>
>>>>> I haven't looked at the code, but I have a few functionality comments
>>>>> after playing with it this morning:
>>>>>
>>>>> - Is it possible to filter whitespace and comments out of the config
>>>>> file before gathering whatever information you need for comparison, or
>>>>> do you want to enforce that the fs.conf files be verbatim identical?
>>>>>
>>>>> - I ran one test where a server had an extra line in its configuration
>>>>> file, and that showed up fine as a mount error with information in the
>>>>> log files showing the size difference.  However, I ran another test
>>>>> where I just changed the value of UnexpectedRequests from "50" to "51",
>>>>> and this did not generate any error.  Is there anything in particular
>>>>> you have to do to enable the checksum tests in addition to the size tests?
>>>>>
>>>>> -Phil
>>>>> _______________________________________________
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>>>>> Pvfs2-developers at beowulf-underground.org
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>>>>>
>>
>