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cluster:93 [2011/01/09 20:30]
hmeij 		cluster:93 [2011/01/09 20:37]
hmeij
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 In short using linpack (More about [[http://en.wikipedia.org/wiki/LINPACK|Linpack on wikipedia]]) here are the results.  The results are dependent on the combination of total memory, total cores, and speed of processors. In short using linpack (More about [[http://en.wikipedia.org/wiki/LINPACK|Linpack on wikipedia]]) here are the results.  The results are dependent on the combination of total memory, total cores, and speed of processors.
  
-  * greentail's Voltaire infiniband switch is capable of just over 1,500 gigaflops or 1.5 teraflops. +  * greentail's nodes, all on Voltaire infiniband switch, are capable of just over 1,500 gigaflops or 1.5 teraflops. 
-  * petaltail/swallowtail's Cisco infiniband switch is capable of 325 gigaflops +  * petaltail/swallowtail's nodes on Cisco infiniband switch are capable of 325 gigaflops 
-  * petaltail/swallowtail's Force 10 ethernet switch is capable of 245 gigaflops+  * petaltail/swallowtail's nodes on Force 10 ethernet switch are capable of 245 gigaflops
     * so the total is 570 gigaflops, but you'd never want to run across both switches simultaneously     * so the total is 570 gigaflops, but you'd never want to run across both switches simultaneously
-  * sharptail's HP ProCurve ethernet switch is estimated at deleivering between 500-700 gigaflops+  * sharptail's nodes on HP ProCurve ethernet switch are estimated at delivering between 500-700 gigaflops
     * never got quite all the nodes working together, not sure why     * never got quite all the nodes working together, not sure why
  
  
 ===== Home Dirs ===== ===== Home Dirs =====
 +
 +===== Passwords =====
 +
 +The password, shadow and group files of host petaltail were used to populate greentail's equivalent files.
 +
 +If you change your password, do it on all four hosts (petaltail, swallowtail, sharptail and greentail).
 +
 +I know, a pain.
 +
  
 ===== SSH Keys ===== ===== SSH Keys =====
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   * log into a host, then issue the command ''ssh-keygen -t rsa''   * log into a host, then issue the command ''ssh-keygen -t rsa''
   * supply an empty passphrase (just hit return)   * supply an empty passphrase (just hit return)
-  * then copy the contents of /home/username/.ssh/id_rsa.pub into the file authroized_keys +  * then copy the contents of /home/username/.ssh/id_rsa.pub into the file authorized_keys 
-  * yoiu can have multiple public ssh key entries in this file+  * you can have multiple public ssh key entries in this file
  
-Note: the software stack on host petaltail/swallowtail created ssh keys for you automatically upon your first login, so for most you this is all set.+Note: the software stack on host petaltail/swallowtail created ssh keys for you automatically upon your first login, so for most of you this is all set.
  
 To test if your keys are set up right, simply ssh around the hosts petaltail, swallowtail and greentail. To test if your keys are set up right, simply ssh around the hosts petaltail, swallowtail and greentail.
cluster/93.txt · Last modified: 2011/01/11 20:55 by hmeij

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