Difference between revisions of "Install relax cloud.sagemath.com"
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+ | The [https://cloud.sagemath.com/ SageMathCloud] is a cloud computing platform designed for computational mathematics that is a part of the [https://en.wikipedia.org/wiki/SageMath Sage project]. | ||
+ | == Purpose == | ||
+ | Why ? | ||
+ | * The first installation of '''relax''' can be an energy barrier | ||
+ | * It could be of interest to make relax available in "the cloud" for the first analysis, so time is not used on solving software dependencies | ||
+ | |||
+ | Problems with "the cloud" | ||
+ | * Very time consuming to "run an online" cloud. | ||
+ | * The benefits of cloud.sagemath.com are well explained here: http://www.sagemath.org/library-why.html | ||
+ | |||
+ | Other info | ||
+ | * The pricing is here: https://cloud.sagemath.com/policies/pricing.html | ||
+ | * There is also the Bio-NMR initiative: http://www.bio-nmr.net | ||
+ | * And a web service with all NMR software - WeNMR: http://www.wenmr.eu | ||
+ | |||
+ | == Possibilities with cloud.sagemath.com == | ||
+ | |||
+ | cloud.sagemath.com currently does not provide admin account or dedicated SMC servers. <br> | ||
+ | A subscription can be purchased for $49 per month (or $499 per year), one can apply the quotas listed here to any projects: | ||
+ | |||
+ | <source lang="text"> | ||
+ | * 16 upgrades Member hosting | ||
+ | * 40 upgrades Network access | ||
+ | * 8 days Idle timeout | ||
+ | * 24 GB Memory | ||
+ | * 40 GB Disk space | ||
+ | * 4 shares CPU shares | ||
+ | * 2 cores CPU cores | ||
+ | </source> | ||
+ | |||
+ | '''The procedure should be''' | ||
+ | * A '''new interested scientist''' would go to SMC, create a project. | ||
+ | * Add '''relax''' as a collaborator to their free project, and '''we''' would click a button to upgrade their project to '''member hosting'''. | ||
+ | * This add '''network access''', increase the cpu shares, etc. | ||
+ | * "We" have a page which lists, for each project, what upgrades "we" have applied | ||
+ | * "We" can also see if the project is being used. | ||
+ | * "We" can remove upgrades at any time (in any granularity). | ||
+ | |||
+ | '''The value of upgrading to "member hosting" is:''' | ||
+ | * Computation is '''much''' faster. The free pool of computers are typically '''massively''' loaded during the week. | ||
+ | * The "free servers" work fine, but they can easily be 15% of the speed of the members-only machines. | ||
+ | * With the $49/month subscription, "we" get to move 16 projects to members-only machines. | ||
+ | |||
+ | === Installation and analysis in the cloud === | ||
+ | '''Installation of relax in cloud.sagemath.com''' | ||
+ | * Instead of making "relax" available for all users on cloud.sagemath.com, each user should install their local copy of relax | ||
+ | * When using svn to checkout relax, there will be a: install_relax_cloud_sagemath_com.sh bash script | ||
+ | * The user now have '''full control''' over any version of relax | ||
+ | * The user can potentially "develop" online with subversion | ||
+ | |||
+ | '''To do Analysis''' | ||
+ | * Use ssh to send data to the server | ||
+ | ** Supported right now, even for free projects. See the button "ssh to your project" in project settings. | ||
+ | * The uploaded data for the researcher is private: | ||
+ | ** Even for free projects, data in projects is only visible to collaborators on that project and nobody else. | ||
+ | ** SMC is not like github, where free = public by default. | ||
+ | ** With SMC everything is private by default, even for free users. | ||
+ | ** However, people can also explicitly share any file or directory tree, and that makes it publicly available | ||
+ | ** Could be a way to share data related to a paper or research project | ||
+ | * Use relax in the terminal in the server | ||
+ | ** Fine for free projects. | ||
== The test project at cloud.sagemath.com == | == The test project at cloud.sagemath.com == | ||
Line 21: | Line 82: | ||
==Software at cloud.sagemath.com== | ==Software at cloud.sagemath.com== | ||
− | ===Is | + | ===Is git available=== |
<source lang="bash"> | <source lang="bash"> | ||
− | ~$ | + | ~$ git --version |
− | + | git version 2.7.6 | |
</source> | </source> | ||
Line 41: | Line 102: | ||
===Is xmgrace available=== | ===Is xmgrace available=== | ||
<source lang="bash"> | <source lang="bash"> | ||
− | ~$ xmgrace | + | ~$ which xmgrace |
− | + | /usr/bin/xmgrace | |
− | |||
− | |||
</source> | </source> | ||
Line 70: | Line 129: | ||
</source> | </source> | ||
− | == | + | ===Server === |
− | Start | + | <source lang="bash"> |
+ | ~$ lscpu | ||
+ | Architecture: x86_64 | ||
+ | CPU op-mode(s): 32-bit, 64-bit | ||
+ | Byte Order: Little Endian | ||
+ | CPU(s): 4 | ||
+ | On-line CPU(s) list: 0-3 | ||
+ | Thread(s) per core: 2 | ||
+ | Core(s) per socket: 2 | ||
+ | Socket(s): 1 | ||
+ | NUMA node(s): 1 | ||
+ | Vendor ID: GenuineIntel | ||
+ | CPU family: 6 | ||
+ | Model: 63 | ||
+ | Model name: Intel(R) Xeon(R) CPU @ 2.30GHz | ||
+ | Stepping: 0 | ||
+ | CPU MHz: 2299.972 | ||
+ | BogoMIPS: 4599.94 | ||
+ | Hypervisor vendor: KVM | ||
+ | Virtualization type: full | ||
+ | L1d cache: 32K | ||
+ | L1i cache: 32K | ||
+ | L2 cache: 256K | ||
+ | L3 cache: 46080K | ||
+ | NUMA node0 CPU(s): 0-3 | ||
+ | </source> | ||
+ | |||
+ | ==Python packages at cloud.sagemath.com== | ||
+ | Start Python: | ||
<source lang="bash"> | <source lang="bash"> | ||
python | python | ||
</source> | </source> | ||
− | + | The current Python version: | |
<source lang="bash"> | <source lang="bash"> | ||
Python 2.7.9 (default, Apr 2 2015, 15:33:21) | Python 2.7.9 (default, Apr 2 2015, 15:33:21) | ||
Line 83: | Line 170: | ||
</source> | </source> | ||
− | Paste in | + | Paste in: |
<source lang="python"> | <source lang="python"> | ||
try: | try: | ||
Line 118: | Line 205: | ||
</source> | </source> | ||
− | Output | + | Output: |
<source lang="python"> | <source lang="python"> | ||
>>> try: | >>> try: | ||
Line 155: | Line 242: | ||
</source> | </source> | ||
− | == | + | == Install Python modules == |
− | |||
− | + | ===Bmrblib=== | |
See [[Bmrblib]] | See [[Bmrblib]] | ||
− | + | {{#tag:source| | |
− | v= | + | v={{current version bmrblib}} |
mkdir -p $HOME/Downloads | mkdir -p $HOME/Downloads | ||
Line 170: | Line 256: | ||
pip install . | pip install . | ||
cd .. | cd .. | ||
− | + | |lang="bash" | |
+ | }} | ||
− | === | + | ===Minfx=== |
See [[Minfx]] | See [[Minfx]] | ||
− | + | {{#tag:source| | |
− | v= | + | v={{current version minfx}} |
mkdir -p $HOME/Downloads | mkdir -p $HOME/Downloads | ||
Line 184: | Line 271: | ||
pip install . | pip install . | ||
cd .. | cd .. | ||
− | + | |lang="bash" | |
+ | }} | ||
− | === | + | ===Mpi4py=== |
See [[OpenMPI#Install_mpi4py]] | See [[OpenMPI#Install_mpi4py]] | ||
− | + | {{#tag:source| | |
− | v= | + | v={{current version mpi4py}} |
mkdir -p $HOME/Downloads | mkdir -p $HOME/Downloads | ||
Line 198: | Line 286: | ||
pip install . | pip install . | ||
cd .. | cd .. | ||
+ | |lang="bash" | ||
+ | }} | ||
+ | |||
+ | ===Test Python packages=== | ||
+ | Paste in: | ||
+ | <source lang="python"> | ||
+ | try: | ||
+ | import bmrblib | ||
+ | print bmrblib.__file__ | ||
+ | print bmrblib.__version__ | ||
+ | except ImportError: | ||
+ | print "no bmrblib module" | ||
+ | |||
+ | |||
+ | try: | ||
+ | import minfx | ||
+ | print minfx.__file__ | ||
+ | print minfx.__version__ | ||
+ | except ImportError: | ||
+ | print "no minfx module" | ||
+ | |||
+ | |||
+ | try: | ||
+ | import mpi4py | ||
+ | print mpi4py.__file__ | ||
+ | print mpi4py.__version__ | ||
+ | except ImportError: | ||
+ | print "no mpi4py module" | ||
+ | </source> | ||
+ | |||
+ | Output: | ||
+ | <source lang="python"> | ||
+ | >>> try: | ||
+ | ... import bmrblib | ||
+ | ... print bmrblib.__file__ | ||
+ | ... print bmrblib.__version__ | ||
+ | ... except ImportError: | ||
+ | ... print "no bmrblib module" | ||
+ | ... | ||
+ | /projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/.local/lib/python2.7/site-packages/bmrblib/__init__.pyc | ||
+ | 1.0.4 | ||
+ | >>> try: | ||
+ | ... import minfx | ||
+ | ... print minfx.__file__ | ||
+ | ... print minfx.__version__ | ||
+ | ... except ImportError: | ||
+ | ... print "no minfx module" | ||
+ | ... | ||
+ | /projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/.local/lib/python2.7/site-packages/minfx/__init__.pyc | ||
+ | 1.0.12 | ||
+ | >>> try: | ||
+ | ... import mpi4py | ||
+ | ... print mpi4py.__file__ | ||
+ | ... print mpi4py.__version__ | ||
+ | ... except ImportError: | ||
+ | ... print "no mpi4py module" | ||
+ | ... | ||
+ | /projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/.local/lib/python2.7/site-packages/mpi4py/__init__.pyc | ||
+ | 2.0.0 | ||
+ | </source> | ||
+ | |||
+ | ==Checkout relax and build== | ||
+ | {{#tag: source| | ||
+ | cd $HOME | ||
+ | {{relax clone}} | ||
+ | |||
+ | # Build | ||
+ | cd relax | ||
+ | scons | ||
+ | |||
+ | # Link to executable | ||
+ | cd $HOME | ||
+ | mkdir -p $HOME/bin | ||
+ | ln -s $HOME/relax/relax $HOME/bin | ||
+ | |||
+ | # Test all of relax with unittests and systemtests | ||
+ | relax --time -u | ||
+ | relax --time -s | ||
+ | | lang="bash" | ||
+ | }} | ||
+ | |||
+ | '''relax works!''' | ||
+ | |||
+ | == Test of OpenMPI == | ||
+ | See [[OpenMPI#Linux_and_Mac]] | ||
+ | <source lang="bash"> | ||
+ | mpirun --report-bindings -np 4 echo "hello world" | ||
+ | |||
+ | mpirun --report-bindings -np 2 relax --multi='mpi4py' | ||
+ | |||
+ | Traceback (most recent call last): | ||
+ | File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/bin/relax", line 7, in <module> | ||
+ | relax.start(profile_flag=False) | ||
+ | File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/relax.py", line 114, in start | ||
+ | processor = load_multiprocessor(relax.multiprocessor_type, callbacks, processor_size=relax.n_processors, verbosity=verbosity) | ||
+ | File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/multi/__init__.py", line 189, in load_multiprocessor | ||
+ | object = clazz(callback=callback, processor_size=processor_size) | ||
+ | File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/multi/mpi4py_processor.py", line 56, in __init__ | ||
+ | raise Too_few_slaves_exception() | ||
+ | multi.multi_processor_base.Too_few_slaves_exception: master slave processing requires at least 2 processors to run you only provided 1, exiting.... | ||
+ | Traceback (most recent call last): | ||
+ | File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/bin/relax", line 7, in <module> | ||
+ | relax.start(profile_flag=False) | ||
+ | File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/relax.py", line 114, in start | ||
+ | processor = load_multiprocessor(relax.multiprocessor_type, callbacks, processor_size=relax.n_processors, verbosity=verbosity) | ||
+ | File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/multi/__init__.py", line 189, in load_multiprocessor | ||
+ | object = clazz(callback=callback, processor_size=processor_size) | ||
+ | File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/multi/mpi4py_processor.py", line 56, in __init__ | ||
+ | raise Too_few_slaves_exception() | ||
+ | multi.multi_processor_base.Too_few_slaves_exception: master slave processing requires at least 2 processors to run you only provided 1, exiting.... | ||
+ | -------------------------------------------------------------------------- | ||
+ | mpirun noticed that the job aborted, but has no info as to the process | ||
+ | that caused that situation. | ||
+ | -------------------------------------------------------------------------- | ||
</source> | </source> | ||
== See also == | == See also == | ||
[[Category:Devel tutorial]] | [[Category:Devel tutorial]] |
Latest revision as of 11:59, 27 October 2017
The SageMathCloud is a cloud computing platform designed for computational mathematics that is a part of the Sage project.
Contents
Purpose
Why ?
- The first installation of relax can be an energy barrier
- It could be of interest to make relax available in "the cloud" for the first analysis, so time is not used on solving software dependencies
Problems with "the cloud"
- Very time consuming to "run an online" cloud.
- The benefits of cloud.sagemath.com are well explained here: http://www.sagemath.org/library-why.html
Other info
- The pricing is here: https://cloud.sagemath.com/policies/pricing.html
- There is also the Bio-NMR initiative: http://www.bio-nmr.net
- And a web service with all NMR software - WeNMR: http://www.wenmr.eu
Possibilities with cloud.sagemath.com
cloud.sagemath.com currently does not provide admin account or dedicated SMC servers.
A subscription can be purchased for $49 per month (or $499 per year), one can apply the quotas listed here to any projects:
* 16 upgrades Member hosting
* 40 upgrades Network access
* 8 days Idle timeout
* 24 GB Memory
* 40 GB Disk space
* 4 shares CPU shares
* 2 cores CPU cores
The procedure should be
- A new interested scientist would go to SMC, create a project.
- Add relax as a collaborator to their free project, and we would click a button to upgrade their project to member hosting.
- This add network access, increase the cpu shares, etc.
- "We" have a page which lists, for each project, what upgrades "we" have applied
- "We" can also see if the project is being used.
- "We" can remove upgrades at any time (in any granularity).
The value of upgrading to "member hosting" is:
- Computation is much faster. The free pool of computers are typically massively loaded during the week.
- The "free servers" work fine, but they can easily be 15% of the speed of the members-only machines.
- With the $49/month subscription, "we" get to move 16 projects to members-only machines.
Installation and analysis in the cloud
Installation of relax in cloud.sagemath.com
- Instead of making "relax" available for all users on cloud.sagemath.com, each user should install their local copy of relax
- When using svn to checkout relax, there will be a: install_relax_cloud_sagemath_com.sh bash script
- The user now have full control over any version of relax
- The user can potentially "develop" online with subversion
To do Analysis
- Use ssh to send data to the server
- Supported right now, even for free projects. See the button "ssh to your project" in project settings.
- The uploaded data for the researcher is private:
- Even for free projects, data in projects is only visible to collaborators on that project and nobody else.
- SMC is not like github, where free = public by default.
- With SMC everything is private by default, even for free users.
- However, people can also explicitly share any file or directory tree, and that makes it publicly available
- Could be a way to share data related to a paper or research project
- Use relax in the terminal in the server
- Fine for free projects.
The test project at cloud.sagemath.com
This audit was performed: 2015/11/24
Project location
https://cloud.sagemath.com/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/files/test%20ipyth.ipynb
Project resources
Disk space: 3000 MB disk space available - 59 MB used 3000 MB given by free project
Memory: 1000 MB RAM memory available - 133 MB used 1000 MB given by free project
CPU cores:1 core 1 core given by free project
CPU shares: 1 share 1 share given by free project
Idle timeout: 1 hour of non-interactive use before project stops 1 hour given by free project
Network access: Yes 1 upgrade given by free project
Member hosting: No 0 upgrades given by free project
Software at cloud.sagemath.com
Is git available
~$ git --version
git version 2.7.6
Is scons available
~$ which scons
/usr/bin/scons
~$ scons --version
SCons by Steven Knight et al.:
script: v2.3.1, 2014/03/02 14:18:15, by garyo on lubuntu
engine: v2.3.1, 2014/03/02 14:18:15, by garyo on lubuntu
engine path: ['/usr/lib/scons/SCons']
Is xmgrace available
~$ which xmgrace
/usr/bin/xmgrace
Is mpirun available
~$ which mpicc
/usr/bin/mpicc
~$ which mpiexec
/usr/bin/mpiexec
~$ which mpirun
/usr/bin/mpirun
~$ mpirun --version
mpirun (Open MPI) 1.6.5
Report bugs to http://www.open-mpi.org/community/help/
~$ mpirun --report-bindings -np 4 echo "hello world"
hello world
hello world
hello world
hello world
Server
~$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 2
Core(s) per socket: 2
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 63
Model name: Intel(R) Xeon(R) CPU @ 2.30GHz
Stepping: 0
CPU MHz: 2299.972
BogoMIPS: 4599.94
Hypervisor vendor: KVM
Virtualization type: full
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 46080K
NUMA node0 CPU(s): 0-3
Python packages at cloud.sagemath.com
Start Python:
python
The current Python version:
Python 2.7.9 (default, Apr 2 2015, 15:33:21)
[GCC 4.9.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
Paste in:
try:
import wx
print wx.__file__
print wx.version()
print wx.__version__
except ImportError:
print "no wx module"
try:
import bmrblib
print bmrblib.__file__
print bmrblib.__version__
except ImportError:
print "no bmrblib module"
try:
import minfx
print minfx.__file__
print minfx.__version__
except ImportError:
print "no minfx module"
try:
import mpi4py
print mpi4py.__file__
print mpi4py.__version__
except ImportError:
print "no mpi4py module"
Output:
>>> try:
... import wx
... print wx.__file__
... print wx.version()
... print wx.__version__
... except ImportError:
... print "no wx module"
...
no wx module
>>> try:
... import bmrblib
... print bmrblib.__file__
... print bmrblib.__version__
... except ImportError:
... print "no bmrblib module"
...
no bmrblib module
>>> try:
... import minfx
... print minfx.__file__
... print minfx.__version__
... except ImportError:
... print "no minfx module"
...
no minfx module
>>> try:
... import mpi4py
... print mpi4py.__file__
... print mpi4py.__version__
... except ImportError:
... print "no mpi4py module"
...
no mpi4py module
Install Python modules
Bmrblib
See Bmrblib
v=1.0.4
mkdir -p $HOME/Downloads
cd $HOME/Downloads
curl http://download.gna.org/bmrblib/bmrblib-$v.tar.gz -o bmrblib-$v.tar.gz
tar -xzf bmrblib-$v.tar.gz
cd bmrblib-$v
pip install .
cd ..
Minfx
See Minfx
v=1.0.12
mkdir -p $HOME/Downloads
cd $HOME/Downloads
curl http://download.gna.org/minfx/minfx-$v.tar.gz -o minfx-$v.tar.gz
tar -xzf minfx-$v.tar.gz
cd minfx-$v
pip install .
cd ..
Mpi4py
v=2.0.0
mkdir -p $HOME/Downloads
cd $HOME/Downloads
wget https://bitbucket.org/mpi4py/mpi4py/downloads/mpi4py-$v.tar.gz
tar -xzf mpi4py-$v.tar.gz
cd mpi4py-$v
pip install .
cd ..
Test Python packages
Paste in:
try:
import bmrblib
print bmrblib.__file__
print bmrblib.__version__
except ImportError:
print "no bmrblib module"
try:
import minfx
print minfx.__file__
print minfx.__version__
except ImportError:
print "no minfx module"
try:
import mpi4py
print mpi4py.__file__
print mpi4py.__version__
except ImportError:
print "no mpi4py module"
Output:
>>> try:
... import bmrblib
... print bmrblib.__file__
... print bmrblib.__version__
... except ImportError:
... print "no bmrblib module"
...
/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/.local/lib/python2.7/site-packages/bmrblib/__init__.pyc
1.0.4
>>> try:
... import minfx
... print minfx.__file__
... print minfx.__version__
... except ImportError:
... print "no minfx module"
...
/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/.local/lib/python2.7/site-packages/minfx/__init__.pyc
1.0.12
>>> try:
... import mpi4py
... print mpi4py.__file__
... print mpi4py.__version__
... except ImportError:
... print "no mpi4py module"
...
/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/.local/lib/python2.7/site-packages/mpi4py/__init__.pyc
2.0.0
Checkout relax and build
cd $HOME
git clone git://git.code.sf.net/p/nmr-relax/code/ relax
# Build
cd relax
scons
# Link to executable
cd $HOME
mkdir -p $HOME/bin
ln -s $HOME/relax/relax $HOME/bin
# Test all of relax with unittests and systemtests
relax --time -u
relax --time -s
relax works!
Test of OpenMPI
mpirun --report-bindings -np 4 echo "hello world"
mpirun --report-bindings -np 2 relax --multi='mpi4py'
Traceback (most recent call last):
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/bin/relax", line 7, in <module>
relax.start(profile_flag=False)
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/relax.py", line 114, in start
processor = load_multiprocessor(relax.multiprocessor_type, callbacks, processor_size=relax.n_processors, verbosity=verbosity)
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/multi/__init__.py", line 189, in load_multiprocessor
object = clazz(callback=callback, processor_size=processor_size)
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/multi/mpi4py_processor.py", line 56, in __init__
raise Too_few_slaves_exception()
multi.multi_processor_base.Too_few_slaves_exception: master slave processing requires at least 2 processors to run you only provided 1, exiting....
Traceback (most recent call last):
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/bin/relax", line 7, in <module>
relax.start(profile_flag=False)
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/relax.py", line 114, in start
processor = load_multiprocessor(relax.multiprocessor_type, callbacks, processor_size=relax.n_processors, verbosity=verbosity)
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/multi/__init__.py", line 189, in load_multiprocessor
object = clazz(callback=callback, processor_size=processor_size)
File "/projects/9cd9d431-3eb2-4cde-a03a-4b9c6b49a1c2/relax_trunk/multi/mpi4py_processor.py", line 56, in __init__
raise Too_few_slaves_exception()
multi.multi_processor_base.Too_few_slaves_exception: master slave processing requires at least 2 processors to run you only provided 1, exiting....
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mpirun noticed that the job aborted, but has no info as to the process
that caused that situation.
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