[daip] Aips and LUSTRE network file system

[Wes Young]

OK, it's a holiday here and our lustre guy isn't in the office today.   
I will consult with him tomorrow and see if there are any special  
issues with logging we need to fret about.

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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