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About cluster parallel environments

post #1 of 2
Thread Starter 
Our cluster has smp and openmpi parallel environments.
smp environment only run code on one node? How many cores in each node? If I define 48 cores, but the node only has 16 cores, what will the cluster do?
openmpi environment can define core number and distribute it to many nodes. Does this mean openmpi is quicker than smp? I am new on cluster computing.
post #2 of 2
SMP is limited to cores on one physical machine because of how memory is handled. OpenMPI uses a different memory model so it allows for processes to be ran on different machines. As far as what is quicker it really depends on your workload and your program. My experience is primarily with OpenMPI.
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ShadowForge
(12 items)
 
Defiant
(14 items)
 
CarbonCat
(13 items)
 
CPUMotherboardGraphicsRAM
Phenom II x6 1405T (unlocked Athlon II X4 640T) ASUS M5A99X EVO AM3+ Asus ENGTX470/2DI/1280MD5/V2 16 GB (4x4GB) G.Skill DDR3 1600 CAS9 1.35v 
Hard DriveHard DriveOptical DriveCooling
WD Caviar Blue 250 2.5" Laptop Drive WD Caviar Black 1TB 3.5" Pioneer BDR-203 BluRay Burner Corsair H60 push 
OSOSMonitorPower
Windows 7 Pro x64 Ubuntu 11.10 Samsung 40" 60hz  ANTEC NEO ECO 520W 
CaseMouse
NZXT Gamma Microsoft Bluetooth Notebook Mouse 5000 
CPUMotherboardGraphicsRAM
i7 - 2600k [5.0 1.42v] ASUS P8Z68 Deluxe Sapphire HD6950 2gb Dirt 3 Edition 8GB G.Skill DDR3 2133 CAS11 
Hard DriveOSMonitorKeyboard
60GB G.Skill Sniper + 2x1TB Spinpoint F3 Raid0 Win 7 Pro x64 ASUS VW266H Razer Blackwidow 
PowerCaseMouse
Seasonic X750 Gold Corsair Carbide 500R White G9 
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