[daip] Aips and LUSTRE network file system

[Wes Young]

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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