[daip] Aips and LUSTRE network file system

[Wes Young]

We haven't actually run AIPS at the AOC on the lustre file system, so  
we really don't know if it works or how well.

wes
wyoung at aoc.nrao.edu



On Nov 13, 2007, at 10:20 AM, Nanni Mauro wrote:

> Thank you for the help.
> If you use lustre at AOC I think that this works well with Aips ...  
> an this  is a good news.
> I am making tests and I can wait for  end of November..
>
> Bye M.Nanni
> Wes Young ha scritto:
>> Well I'm afraid our lustre guy didn't know anything about locking,  
>> so we'll have to investigate it ourselves.  We have a cluster at  
>> the AOC with the lustre system on it, unfortunately due to other  
>> commitments and US holidays it could be as much as two weeks before  
>> we might have anything sensible to say. If you haven't heard back  
>> from us by the 27th you should email us again. Apologies for the  
>> delay.
>>
>> wes
>> wyoung at aoc.nrao.edu
>>
>>
>>
>> On Nov 12, 2007, at 11:24 AM, Nanni Mauro wrote:
>>
>>> NO.  I download the kernel and modules in rpm binary format.
>>>
>>> I can have made  someting   of wrong in the configuration , because
>>> that  is the first time  that I install Lustre, but I do not know  
>>> what.
>>>
>>> I am searching news about this file system that is wery efficient  
>>> for a
>>> cluster ( where  the loking  must be present because we have  
>>> concurrent
>>> task that works  on the same file ) but phereps is not a "standard
>>> locking".
>>>
>>> Thank you
>>> M.Nanni
>>>
>>> Wes Young ha scritto:
>>>> Did you build the lustre filesystem yourself? Did you enable  
>>>> locking?
>>>>
>>>> wes
>>>> wyoung at aoc.nrao.edu
>>>>
>>>>
>>>>
>>>> On Nov 12, 2007, at 10:29 AM, Eric Greisen wrote:
>>>>
>>>>> There are 2 things that I see:
>>>>>
>>>>> 1. File locking is not implemented for your file system. This is
>>>>> particularly bad for aisp disk 1.
>>>>>
>>>>> 2. When the lock business is ignored ("non-atomic" file  
>>>>> creation), the
>>>>> attempt to fill small files with 0's in ZCREAT also fails to  
>>>>> fill the
>>>>> requested number of 0s.  Since aips only uses the most basic I/O
>>>>> calls, e.g. open, read/write, close I think there must be several
>>>>> further things missing from your operating system.
>>>>>
>>>>> Eric Greisen
>>>>>
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