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--- cluster:93 [2011/01/10 16:04]
hmeij
+++ cluster:93 [2011/01/10 21:41]
hmeij
@@ Line 2: / Line 2: @@
 **[[cluster:0|Back]]**
-{{:cluster:greentail.jpg|}}\\
+|{{:cluster:greentail.jpg|}}|
-{{:cluster:swallowtail.jpg|}}{{:cluster:petaltail.jpg|}} {{:cluster:sharptail.jpg|}}
+|  greentail  |
 ====== Greentail ======
@@ Line 19: / Line 20: @@
 ===== Design =====
-The purchase of the HP hardware followed a fierce bidding round in which certain design aspects had to met.
+The purchase of the HP hardware followed a fierce bidding round in which certain design aspects had to be met.
   * We continually run out of disk space for our home directories.  So the new cluster had to have a large disk array on board.
@@ Line 111: / Line 112: @@
 ===== MPI =====
+For those of you running MPI or MPI enabled applications, you will need to make some changes to your scripts.  The ''wrapper'' program to use with greentail's Lava scheduler is the same as for cluster sharptail. It can be found here:  /share/apps/bin/lava.openmpi.mpirun.   If other flavors are desired, you can inform me or look look at the example scripts lava.//mpi_flavor//.mpi[run|exec].
+Sometime ago I wrote some code to detect if a node is infiniband enabled or not, and based on the result, add command line arguments to the mpirun invocation.  If you use that code, you will need to change:  the path to obtain the port status (/usr/bin/ibv_devinfo) and in the block specify the interface change eth1 to ib0.
 ===== ... =====
+|{{:cluster:swallowtail.jpg|}}|{{:cluster:petaltail.jpg|}}|{{:cluster:sharptail.jpg|}}|
+|  swallowtail  |  petaltail  |  sharptail  |

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