The amount of memory you can set per program is limited, and OpenMPI tries to set memory beyond this limit, resulting in a Segmentation fault.
See the OpenMPI FAQ page for more info, but in short, for a single CPU, issueing the command
should work. If you want to use more CPU's on more nodes, you have to issue this command on each node.
Hi,
Just recently we seem to be getting the following error message relating to SSH when we run the UNIX script in background mode:
warning: You have no controlling tty. Cannot read confirmation.^M
warning: Authentication failed.^M
Disconnected; key exchange or algorithm negotiation... (1 Reply)
Hi
Please help me with the following problem with my script.
The following block of code is not repeating in the while loop and exiting after searching for first message.
input_file
==========
host001-01
host001-02
2008-07-23 13:02:04,651 ConnectionFactory - Setting session state... (2 Replies)
1) when user login to the server the session got colosed. How will resolve?
2) While firing the command ls -l we are not able to see the any files in the director. but over all view the file system using the command df -g it is showing 91% used. what will be the problem?
Thanks in advance. (1 Reply)
hello,
i get these warnings on make(ing)
/usr/bin/ld: warning: libgfortran.so.1, needed by /opt/openmpi/lib/libmpi_f90.so, may conflict with libgfortran.so.3
/usr/bin/ld: warning: libgfortran.so.1, needed by /usr/lib/gcc/x86_64-redhat-linux6E/4.3.2/../../../liblapack.a, may conflict with... (1 Reply)
Hi,
This is rather a question from a "user" than from a sys admin, but I think this forum is apropriate for the question.
I have an adress with automatic email forwarding and for some senders (two hietherto), emails are bouncing. This has really created a lot of problems those two time so I... (0 Replies)
Hi everybody,
my problem is the following:
I'm trying to run an openmpi program on a cluster (atlasz.elte.hu, it's in hungarian, but you can try google translate),
but I always got this error:
Fatal error in MPI_Init: Other MPI error, error stack:
MPIR_Init_thread(394)...........:... (0 Replies)
I am new in Linux and clustering. I am setting up a Beowulf Cluster using several PCs according to this guide "Beowulf How-To"
I have setup and configure accordingly except for NFS part. Because I am not requiring it for my application. I have set my ssh to login each other without password. I... (1 Reply)
I don't know if you guys get this problem sometimes at Terminal but I had been having this problem since yesterday :( Maybe I overdid the Terminal. Even the codes that used to work doesn't work anymore.
Here is what 's happening:
* I wanted to remove lines containing digits so I used this... (25 Replies)
Hi everyone,
I am experiencing discontinuity of Internet service, this started 1 month ago. Everything worked very well for 1 year of intensive use, but now, I have problems reaching my gateway.
The gateway is not my router but a node belonging to my ISP and I share the same public IP with... (3 Replies)
I have about 12,000,000 mod files I'm trying to turn into a test of "unlimited cloud storage" by running them all through VLC and blowing them into mp3 files. I can get this to work serially but when trying to use openMPI or Parallel, something in the syntax is tripping it up some. Here is an... (1 Reply)
Discussion started by: sparticus414
1 Replies
LEARN ABOUT CENTOS
lamnodes
LAMNODES(1) LAM TOOLS LAMNODES(1)NAME
lamnodes - Resolve LAM node/CPU notation to Unix hostnames.
SYNOPSIS
lamnodes [-chin] [where]
OPTIONS -c Suppress printing the CPU count for each node.
-h Print the command help menu.
-i Print IP addresses (instead of IP names)
-n Suppress printing CPU count for each node
DESCRIPTION
The lamnodes command is used to resolve LAM node/CPU nomenclature to Unix hostnames. It can be used to determine the current running con-
figuration of the LAM/MPI run-time environment, and generate a boot schema that can be used to launch LAM in the future.
By default, lamnodes will print out the node number, default IP name, CPU count, and per-node flags for each node in the running LAM.
gethostbyaddr(3) is used to obtain default hostnames. If gethostbyaddr(3) fails, the IP number is displayed instead.
This command can be used by setup shell scripts (and the like) to determine information from a currently-running LAM universe. For exam-
ple, use lamnodes to resolve particular CPUs and/or nodes to specific unix hostnames. In a batch environment, lamnodes can be used to
determine which CPUs share a common node (note that MPI_GET_PROCESSOR_NAME can be used for a similar effect in an MPI program).
lamnodes also shows per-node flags. Currently defined flags are:
origin The node where lamboot was executed.
this_node The node where lamnodes is running.
no_schedule The node will not be used to run MPI and serial processes when N and C are used to mpirun and lamexec.
EXAMPLES
lamnodes N -n
Display IP names and CPU counts for all nodes. This output can be saved and later used with lamboot(1).
lamnodes C -n -c
Display the IP name of the nodes containing each CPU, and suppress the LAM node number and CPU count. This output can be saved and
later used with lamboot(1).
SEE ALSO bhost(5), gethostbyaddr(3), lamboot(1)LAM 7.1.4 July, 2007 LAMNODES(1)