maybe you know how to work around this, but in my experience Xgrid
runs everything under user 'nobody', and you can't access any data in
the node's hard disk (for security). The only way of passing data to
the jobs is to send it with the along with the job submission, which
makes a copy of the data you are passing to the 'tmp' directory of the
node... then, you'll have to send a bunch of MByte on calling the job,
and then get another bunch on MByte from the output.... annoying.
On Wed, Aug 26, 2009 at 4:13 PM, Evi Vanoost<[log in to unmask]> wrote:
> You can also use XGrid if you want an integrated solution. Technically you
> can modify the script that submits it to SGE and make it so it starts
> multiple processes locally.
> Evi Vanoost
> [log in to unmask]
> (585) 275-4549
> On Aug 26, 2009, at 5:59 AM, Ajay Garg wrote:
>> Dear Dave,
>> Thanks a lot.
>> So I have to learn about SGE installation.
>> On 26-Aug-09, at 10:35 AM, Dave Flitney wrote:
>>> Dear Ajay,
>>> On 26 Aug 2009, at 01:38, Ajay Garg wrote:
>>>> Dear FSL users
>>>> The snow leopard is coming this Friday. They say it can make use of
>>>> multiple processors. I
>>>> have 8-core Mac Pro? What could be advantage in the processing time of
>>>> TBSS? Will there
>>>> be any need for SGE grid engine installation?
>>> As far as I'm aware all versions of MacOS X have been able to use
>>> multiple processors where available, however, FSL scripts and programs are
>>> not inherently able to use multiple processors, i.e., "threaded". Instead
>>> these scripts use scheduling software, SGE, and divide the tasks into
>>> smaller, independent parallelisable sections. This form of parallel
>>> processing has the advantage that it is compatible with using both multiple
>>> processors and multiple hosts and doesn't need any complex thread code to
>>> achieve parallelism.
>>> So the short answer is that any of Snow Leopard's new multiple processor
>>> capabilities are not going to make any difference to TBSS or any other FSL
>>> software. You still need SGE or similar installed to take advantage of your
>>> Mac's multiple cores.
>>> Regards, Dave
>>> Dave Flitney, IT Manager
>>> Oxford Centre for Functional MRI of the Brain
>>> E:[log in to unmask] W:+44-1865-222713 F:+44-1865-222717
>>> URL: http://www.fmrib.ox.ac.uk/~flitney