[Gate-users] running GATE on multiple machines

[sebnem erturk]

Hi All,

We are trying to run multiple instances of Gate on the same computational
node to exploit the presence of multiple cores, but we are getting this kind
of output from the log:



Processing ./MLEM_27sources1x106Bq_test_mod_140_250keV1.mac file...

0: paradent-9.rennes.grid5000.fr

MLEM_27sources1x106Bq_test_mod_140_250keV1.mac
   100%   22KB  21.9KB/s   00:00



                [The first process seems OK, but for the other 3 we get..]



Processing ./MLEM_27sources1x106Bq_test_mod_140_250keV2.mac file...

1: paradent-9.rennes.grid5000.fr

MLEM_27sources1x106Bq_test_mod_140_250keV2.mac
100%   22KB  21.9KB/s   00:00

        [G4-cerr] [systems/SPECThead/base::IsValidAttachmentRequest]:

        [G4-cerr]       A volume creator ('SPECThead') is already attached
to this system component

        [G4-cerr]

        [G4-cerr] [systems/SPECThead/base::SetInserter]:

        [G4-cerr]       Ignoring attachment request

        [G4-cerr]



Processing ./MLEM_27sources1x106Bq_test_mod_140_250keV3.mac file...

2: paradent-9.rennes.grid5000.fr

MLEM_27sources1x106Bq_test_mod_140_250keV3.mac
100%   22KB  21.9KB/s   00:00

        [G4-cerr] [systems/SPECThead/base::IsValidAttachmentRequest]:

        [G4-cerr]       A volume creator ('SPECThead') is already attached
to this system component

        [G4-cerr]

        [G4-cerr] [systems/SPECThead/base::SetInserter]:

        [G4-cerr]       Ignoring attachment request

        [G4-cerr]



Processing ./MLEM_27sources1x106Bq_test_mod_140_250keV4.mac file...

3: paradent-9.rennes.grid5000.fr

MLEM_27sources1x106Bq_test_mod_140_250keV4.mac
                                        100%   22KB  21.9KB/s   00:00

        [G4-cerr] [systems/SPECThead/base::IsValidAttachmentRequest]:

        [G4-cerr]       A volume creator ('SPECThead') is already attached
to this system component

        [G4-cerr]

        [G4-cerr] [systems/SPECThead/base::SetInserter]:

        [G4-cerr]       Ignoring attachment request

        [G4-cerr]



So essentially the other 3 Gate processes are using the same object
'SPECThead'.

Is this “sharing” of objects instantiated by the first computation
concurrency-OK? I mean.. can this fact lead to wrong results?
There is one point that we are not sure ;

During the Geant4 installation on grid  for the question of  "Do you expect
to run these scripts and binaries on multiple machines?, we chose
answer as*"NO" .

Do you want to build shared libraries (yes)
**Do you want to build static libraries (yes)
**Do you want to build 'global'  compound libraries (yes)
*

Is this  correct to install GATE  and Geant4 on multiple machine??

Thank you again for your help,guidance and support in advance ?

Best regards,


-- 
Sebnem Erturk
University of Pisa
Applied Physics Dpt.
Largo Pontecorvo
56127 Pisa-Italy
Office :0039 050 2214346
Mobile :0039 345 3331440
http://www.df.unipi.it/~fiig/