Boy, passwordless ssh is a pain in the ass.  Something so simple, can cause me to rip my hair out.  So a tut to myself to make sure I don't go through quite the torture that I just went through.

Need to have openssh installed on all machines.

Check that the config is set up right... /etc/ssh/sshd_config ... must restart sshd service if you make a change here.

Create the .ssh directory off your home directory (mkdir .ssh).  Do a chmod 700 .ssh ... this turns out to be important.

Follow these commands... all done from your home directory of the local and remote computer.

$local ssh-keygen -t dsa
$local scp ~/.ssh/id_dsa.pub REMOTE:.
$remote cat ~/id_dsa.pub >>~/.ssh/authorized_keys
$remote ssh-keygen -t dsa
$local scp REMOTE:.ssh/id_dsa.pub .
$local cat ~/id_dsa.pub >>~/.ssh/authorized_keys

Also do a chmod 700 ~/.ssh/authorized_keys on both the remote and local ... yes, important.

The ultimate goal that the above commands accomplish... is to get a copy of the local machines public key (found in id_dsa.pub) and get it appended to the remote machines authorized_keys file.

Now should be able to do a ssh MACHIINE date without a password.  ssh into both the local and remote machine from both computers.

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New cluster put together.  This time paired an Athlon II X4 processor with the Phenom X4... the benchmark results...

System Information for node1
                         
System Date         : Wed Nov 25 20:45:36 2009 UTC
Alternate Hostname  : None
Machine Address     : 192.168.1.146 
Alternate Address   : 192.168.1.146 
Machine OS          : Linux      
Kernel              : 2.6.28-15-generic  
Linux Distribution  : 5.0  
CPU Name            : AMD Athlon(tm) II X4 620 Processor    
CPU Type            : i686    
CPU Instructions    : barcelona    
Physical CPUs       : 1    
Cores per CPU       : 4    
Total Processors    : 4    
CPU Speed (MHz)     : 800.000   
System Memory       : 2517 Mb
Binaries            : STRC Compiled x32    

           
System Information for server
                         
System Date         : Wed Nov 25 20:45:37 2009 UTC
Alternate Hostname  : None
Machine Address     : 192.168.1.127 
Alternate Address   : 192.168.1.127 
Machine OS          : Linux      
Kernel              : 2.6.31-14-generic  
Linux Distribution  : squeeze/sid  
CPU Name            : AMD Phenom(tm) 9950 Quad-Core Processor    
CPU Type            : i686    
CPU Instructions    : barcelona    
Physical CPUs       : 1    
Cores per CPU       : 4    
Total Processors    : 4    
CPU Speed (MHz)     : 2599.682   
System Memory       : 3276 Mb
Binaries            : STRC Compiled x32    

WRF EMS ARW core benchmark simulation completed in 16 minutes 29 seconds

Pleased with the results, when compared to cluster that used an Athlon X2 instead of the Athlon II X4

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Okay search engines, crawl this.  UltraXL Facebook page can be found at http://www.facebook.com/group.php?gid=197666576340&ref=mf

More tags... Starsiege tribes.  Tribes 2. Xenolith. Zoyx.  I feel so meta.

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                          System Information for node1
                         
                              System Date         : Fri Aug 28 22:19:07 2009 UTC
                              Alternate Hostname  : None
                              Machine Address     : 192.168.10.2 
                              Alternate Address   : 192.168.1.125 
                              Machine OS          : Linux      
                              Kernel              : 2.6.28-14-generic  
                              Linux Distribution  : 5.0  
                              CPU Name            : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+    
                              CPU Type            : i686    
                              CPU Instructions    : k8e    
                              Physical CPUs       : 1    
                              Cores per CPU       : 2    
                              Total Processors    : 2    
                              CPU Speed (MHz)     : 1800.000   
                              System Memory       : 938 Mb
                              Binaries            : STRC Compiled x32    

            
                          System Information for Server
                         
                              System Date         : Fri Aug 28 22:18:57 2009 UTC
                              Alternate Hostname  : None
                              Machine Address     : 192.168.10.1 
                              Alternate Address   : 192.168.1.127 
                              Machine OS          : Linux      
                              Kernel              : 2.6.28-15-generic  
                              Linux Distribution  : 5.0  
                              CPU Name            : AMD Phenom(tm) 9950 Quad-Core Processor    
                              CPU Type            : i686    
                              CPU Instructions    : barcelona    
                              Physical CPUs       : 1    
                              Cores per CPU       : 4    
                              Total Processors    : 4    
                              CPU Speed (MHz)     : 2603.531   
                              System Memory       : 3276 Mb
                              Binaries            : STRC Compiled x32    

           WRF EMS ARW core benchmark simulation completed in 25 minutes 46 seconds

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                          System Information for node1
                         
                              System Date         : Fri Aug 28 20:25:23 2009 UTC
                              Alternate Hostname  : None
                              Machine Address     : 192.168.10.2 
                              Alternate Address   : None available 
                              Machine OS          : Linux      
                              Kernel              : 2.6.28-14-generic  
                              Linux Distribution  : 5.0  
                              CPU Name            : AMD Athlon(tm) 64 X2 Dual Core Processor 4200+    
                              CPU Type            : i686    
                              CPU Instructions    : k8e    
                              Physical CPUs       : 1    
                              Cores per CPU       : 2    
                              Total Processors    : 2    
                              CPU Speed (MHz)     : 1000.000   
                              System Memory       : 938 Mb
                              Binaries            : STRC Compiled x32    

            
                          System Information for Server
                         
                              System Date         : Fri Aug 28 20:24:34 2009 UTC
                              Alternate Hostname  : None
                              Machine Address     : 192.168.10.1 
                              Alternate Address   : 192.168.1.127 
                              Machine OS          : Linux      
                              Kernel              : 2.6.28-15-generic  
                              Linux Distribution  : 5.0  
                              CPU Name            : AMD Phenom(tm) 9950 Quad-Core Processor    
                              CPU Type            : i686    
                              CPU Instructions    : barcelona    
                              Physical CPUs       : 1    
                              Cores per CPU       : 4    
                              Total Processors    : 4    
                              CPU Speed (MHz)     : 2603.531   
                              System Memory       : 3276 Mb
                              Binaries            : STRC Compiled x32    

           WRF EMS ARW core benchmark simulation completed in 27 minutes 47 seconds

Now just the server alone...

                 System Date         : Fri Aug 28 21:14:14 2009 UTC
                 Alternate Hostname  : None
                 Machine Address     : 192.168.10.1 
                 Alternate Address   : 192.168.1.127 
                 Machine OS          : Linux      
                 Kernel              : 2.6.28-15-generic  
                 Linux Distribution  : 5.0  
                 CPU Name            : AMD Phenom(tm) 9950 Quad-Core Processor    
                 CPU Type            : i686    
                 CPU Instructions    : barcelona    
                 Physical CPUs       : 1    
                 Cores per CPU       : 4    
                 Total Processors    : 4    
                 CPU Speed (MHz)     : 2603.531   
                 System Memory       : 3276 Mb
                 Binaries            : STRC Compiled x32    

           WRF EMS ARW core benchmark simulation completed in 25 minutes 41 seconds

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Listened to last weeks Security Now podcast. Steve Gibson went off-topic and talked about Vitamin D for half of the episode. Mainly he hit on how Vitamin D is a good way to fight off cancer, viruses and rickets. Also gabbed about why our "stay-inside culture" results in us not getting much Vitamin D flowing through our bodies.

Nothing really hit home until he mentioned in fleeting about Vitamin D helping to fight off auto-immune conditions. I have an auto-immune condition... eczema. When you talk about auto-immune conditions, you are usually referring to type 1 diabetes, multiple sclerosis (MS), rheumatoid arthritis (RA), etc. All of these and eczema have one thing in common, your immune system is attacking friendly material, not alien invaders to your body. That's what my eczema is all about, my immune system is attacking my skin.

My doctor prescribed steroid creams for my eczema. I have progressed through three different ointments, each stronger than the previous. None have done anything... very frustrating. Why Vitamin D for eczema? Vitamin D isn't a Vitamin, really. It is a steroid. So it would make sense that Vitamin D would help eczema.

At first glance you would think I would be getting enough Vitamin D. I drink about a 2-3 quarts of fortified milk a day. I also am pretty good at going outside during the summer. Fortified milk and UVB hitting your skin are ways of getting Vitamin D into your body. But I am working on the theory that I need considerably more Vitamin D than what is required by the FDA. The Institute Of Medicine is currently doing a rethink on the minimum requirements for vitamin D.

Being a bit desperate to get rid of this eczema, yesterday was the first dose of 5000 IU of Vitamin D₃. I will take one of these every 3 days. Takes a long time to get the results from Vitamin D - I will give it a month. Hopefully it will help with other problems like achy joints... although I suspect that has something to do with being middle-aged. Also after a month, I plan on going into the lab and checking my Vitamin D count along with TSH.

For more reading, this is the best source I have found on the intrawebs. The wikipedia entry on Vitamin D is a good read as well.

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Managed to start up the benchmark for the WRF_EMS this evening.  WRF_EMS was running on a Ubuntu 9.04 VM using VirtualBox on top of Windows 7.  It did indeed start up and it maxed out all 4 processors.  Something it did not do when I tried to run the previous version of WRF_EMS on the previous version of Ubuntu last winter.  So some progress there.  Your screenshot of this convoluted mess.



Problem was that after a bit, the run would dump and spit out an error code.  Different places too.  Soooo, somewhere along the line, some bits were being contaminated, and not corrected.  Don't know who the culprit is at this moment, but I think I will put VirtualBox at the top of the list.  Memory management for VirtualBox probably isn't bug free yet.

Now doing a fresh install of Ubuntu on a spare hard drive.  We'll see how it works without VirtualBox and Windows 7 in the mix.

Concerning Ubuntu, some things need to be done in order to get WRF_EMS running to this point.  My notes so far:

sudo apt-get install csh // Yup, no c-shell in the default install.  You then have to make csh the default shell for the user you are installing the WRF under.  Log off then back on after changing the default shell.

sudo apt-get install build-essential  // Don't know if this is needed, but like to have it around in case we are compiling something.

sudo mv /bin/sh /bin/sh-move-out-of-the-effing-way
sudo ln -s /bin/bash /bin/sh  // Doing this symbolic link is necessary to get rid of some syntax errors.

When running the install script, run it under the user that you want to have control of the WRF.  Don't be running it under root or sudo.  The script borks the ownership when installed this way.  Yes, I told the script what user to give permissions to.

You will also need to use the wget method (ems_install.pl --http --wget) and not the curl way.  Using curl will cause puke-age.  Ubuntu doesn't come with curl installed by default anyway.

That's just to get to the benchmark stage.  I haven't reached the point where I am defining the domain.  Expecting to spew more swear words when I reach that point.

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