[General] Running ParaView on multiple cores

flotus1 · December 2, 2013, 05:44

I am unable to run ParaView in parallel on one of our workstations. Running it on a single core works perfectly.

The operating system is OpenSuse 12.3.
The versions of Paraview I tried are 3.98 and 4.1 RC1.
The workstation is a 2-CPU machine with 2 Xeon E5-2687W processors, so it should be able to run applications in parallel.

When I activate the "use multi-core" option and restart PV, I get the following error messages in the command shell:

Code:

AutoMPI: SUCCESS: command is:
 "/usr/Paraview/ParaView-4.1.0-RC1-Linux-64bit/lib/paraview-4.1/mpiexec" "-np" "2" "/usr/Paraview/ParaView-4.1.0-RC1-Linux-64bit/lib/paraview-4.1/pvserver" "--server-port=40062"
AutoMPI: starting process server
-------------- server output --------------
ssh: Could not resolve hostname P-H-287-20LIX.site: Name or service not known
AutoMPI: server never started.
vtkProcessModuleAutoMPIInternals: Server never started.
Generic Warning: In /home/utkarsh/Dashboards/MyTests/NightlyMaster/ParaViewSuperbuild-Release/paraview/src/paraview/ParaViewCore/ServerManager/Core/vtkSMSession.cxx, line 315
Failed to automatically launch 'pvserver' for multi-core support. Defaulting to local session.

From PV, I get the output message:

Quote:

Generic Warning: In /home/utkarsh/Dashboards/MyTests/NightlyMaster/ParaViewSuperbuild-Release/paraview/src/paraview/ParaViewCore/ServerManager/Core/vtkSMSession.cxx, line 315
Failed to automatically launch 'pvserver' for multi-core support. Defaulting to local session.

Strange enough, I have no problems running the same versions of PV in parallel on a different workstation operating OpenSuse 11.4.
What can I do to get it running?

wyldckat · December 8, 2013, 14:23

Hi Alex,

Sorry, I was the one that had requested you to ask this here and I didn't manage to look into this sooner.

OK, lets try to diagnose this. My first guess is that your machine in question has got the host name "P-H-287-20LIX.site", but no IP is assigned to that name. To check this, run:

Code:

ping P-H-287-20LIX.site

Use Ctrl+C to abort. To compare with something similar to what you should be seeing, run:

Code:

ping 127.0.0.1

If it does not show a similar output, then the problem is as I guess, where there is no IP address assigned to that host name.
If this is the case, then (as root) edit the file "/etc/hosts" and add this line to the end:

Code:

127.0.0.1 P-H-287-20LIX.site

Save and close the file. Then back as normal user (not as root), try running ParaView once again.

Best regards,
Bruno

flotus1 · December 9, 2013, 02:47

Hi Bruno, thanks for your reply. I knew you did not forget about this.

Well first of all, your guess was correct. Adding the name of the system to the host list did the trick.
But I have an additional question concerning this issue.
On the other system I mentioned, the entry in /etc/hosts reads

Code:

127.0.0.2 P-H-287-04.LIX.site P-H-287-04.LIX

Obviously, the name of this system is "P-H-287-04.LIX". I was just wondering about the different IP-address here although localhost still has "127.0.0.1"
Sorry if this is more of a linux question, but there are no experts at my university.

wyldckat · December 9, 2013, 17:49

Hi Alex,

Ah, I meant to write about that, but thought that it was too much information

So, the "127.0.0.*" IP addresses are usually all part of the loopback mechanism: http://en.wikipedia.org/wiki/Loopbac....28TCP.2FIP.29

Therefore, you can use any or all values from 1 to 254 for the last number! At least in theory

For example, all of these are part of the loopback system:

Code:

127.0.0.1
127.0.0.2
127.0.0.3
...
127.0.0.39
127.0.0.40
127.0.0.41
...
127.0.0.102
127.0.0.103
127.0.0.104
....
127.0.0.253
127.0.0.254

The ellipsis are just so that I wouldn't have the bad idea to write all of the 254 possible addresses

Oh, as for the names to the right of the IP address: I don't know if there is a limit, but you can write there any and all names you want to associate to said IP address, for example:

Code:

127.0.0.5 cookies.com milk.net tea.it home.local out.of.ideas

Best regards,
Bruno

flotus1 · December 11, 2013, 11:12

Thank you, I really appreciate your help.

luchen2408 · January 20, 2014, 01:06

hello,Alex and wyldckat
I also want to parallel run paraview. I work with a server (24 cores).
I have tried some methods, but it faild.
Can you share me the detail procedures on how to running paraview on multi cores? Thanks.

flotus1 · January 20, 2014, 03:22

It would be better to start a new thread, even if the problem appears to be similar in the first place.
Try again and provide more information.

December 8, 2013, 14:23		#2
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,975 Blog Entries: 45 Rep Power: 128	Hi Alex, Sorry, I was the one that had requested you to ask this here and I didn't manage to look into this sooner. OK, lets try to diagnose this. My first guess is that your machine in question has got the host name "P-H-287-20LIX.site", but no IP is assigned to that name. To check this, run: Code: ping P-H-287-20LIX.site Use Ctrl+C to abort. To compare with something similar to what you should be seeing, run: Code: ping 127.0.0.1 If it does not show a similar output, then the problem is as I guess, where there is no IP address assigned to that host name. If this is the case, then (as root) edit the file "/etc/hosts" and add this line to the end: Code: 127.0.0.1 P-H-287-20LIX.site Save and close the file. Then back as normal user (not as root), try running ParaView once again. Best regards, Bruno Tobi and flotus1 like this. __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM

December 9, 2013, 02:47		#3
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,399 Rep Power: 46	Hi Bruno, thanks for your reply. I knew you did not forget about this. Well first of all, your guess was correct. Adding the name of the system to the host list did the trick. But I have an additional question concerning this issue. On the other system I mentioned, the entry in /etc/hosts reads Code: 127.0.0.2 P-H-287-04.LIX.site P-H-287-04.LIX Obviously, the name of this system is "P-H-287-04.LIX". I was just wondering about the different IP-address here although localhost still has "127.0.0.1" Sorry if this is more of a linux question, but there are no experts at my university.

December 9, 2013, 17:49		#4
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,975 Blog Entries: 45 Rep Power: 128	Hi Alex, Ah, I meant to write about that, but thought that it was too much information So, the "127.0.0.*" IP addresses are usually all part of the loopback mechanism: http://en.wikipedia.org/wiki/Loopbac....28TCP.2FIP.29 Therefore, you can use any or all values from 1 to 254 for the last number! At least in theory For example, all of these are part of the loopback system: Code: 127.0.0.1 127.0.0.2 127.0.0.3 ... 127.0.0.39 127.0.0.40 127.0.0.41 ... 127.0.0.102 127.0.0.103 127.0.0.104 .... 127.0.0.253 127.0.0.254 The ellipsis are just so that I wouldn't have the bad idea to write all of the 254 possible addresses Oh, as for the names to the right of the IP address: I don't know if there is a limit, but you can write there any and all names you want to associate to said IP address, for example: Code: 127.0.0.5 cookies.com milk.net tea.it home.local out.of.ideas Best regards, Bruno __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Setting up Lid driven Cavity Benchmark with 1M cells for multiple cores	puneet336	OpenFOAM Running, Solving & CFD	11	April 7, 2019 00:58
[OpenFOAM] Paraview not running my simulation	charles4allme	ParaView	3	August 4, 2018 12:09
[foam-extend.org] foam-extend-3.1 multiple versions paraview issue	CFDpal	OpenFOAM Installation	1	May 31, 2018 08:51
How to run OpenFOAM using Shared Memory method on local machine with multiple cores?	ronithstanly	OpenFOAM Running, Solving & CFD	1	August 4, 2017 00:31
[OpenFOAM] Problem running paraview with xming	id.gomez65	ParaView	4	February 6, 2016 20:12

December 11, 2013, 11:12		#5
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,399 Rep Power: 46	Thank you, I really appreciate your help.

January 20, 2014, 01:06		#6
luchen2408 Member luchen Join Date: Jul 2011 Posts: 44 Rep Power: 14	hello,Alex and wyldckat I also want to parallel run paraview. I work with a server (24 cores). I have tried some methods, but it faild. Can you share me the detail procedures on how to running paraview on multi cores? Thanks.

January 20, 2014, 03:22		#7
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,399 Rep Power: 46	It would be better to start a new thread, even if the problem appears to be similar in the first place. Try again and provide more information.