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2. In the <code>$SYSTEM group</code> of the input file, define the <code>MWORDS</code> and <code>MEMDDI</code> options. This tells GAMESS how much memory it is allowed to use. | 2. In the <code>$SYSTEM group</code> of the input file, define the <code>MWORDS</code> and <code>MEMDDI</code> options. This tells GAMESS how much memory it is allowed to use. | ||
* <code>MWORDS</code> is the maximum replicated memory which a job can use, on every core. This is given in units of 1,000,000 words (as opposed to 1024*1024 words), and a word is defined as 64 bits = 8 bytes. | |||
* <code>MEMDDI</code> is the grand total memory needed for the distributed data interface (DDI) storage, given in units of 1,000,000 words. The memory required on each processor core for a run using <tt>p</tt> CPU-cores is therefore <tt>MEMDDI/p + MWORDS</tt>. | |||
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