Revision f30d0610 man/hail.rst

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If the input file name is ``-`` (a single minus sign), then the request
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data will be read from *stdin*.
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Apart from input data, hail collects data over the network from all


  		





  
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MonDs with the --mond option. Currently it uses only data produced by


  		





  
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the CPUload collector.


  		





  
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ALGORITHM


  		





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~~~~~~~~~


  		





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  in the JSON request itself. This is mostly used for debugging. The


  		





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  format of the file is described in the man page **htools**\(1).


  		





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\--mond


  		





  
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  If given the program will query all MonDs to fetch data from the


  		





  
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  supported data collectors over the network.


  		





  
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\--mond-data *datafile*


  		





  
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  The name of the file holding the data provided by MonD, to override


  		





  
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  quering MonDs over the network. This is mostly used for debugging. The


  		





  
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  file must be in JSON format and present an array of JSON objects ,


  		





  
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  one for every node, with two members. The first member named ``node``


  		





  
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  is the name of the node and the second member named ``reports`` is an


  		





  
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  array of report objects. The report objects must be in the same format


  		





  
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  as produced by the monitoring agent.


  		





  
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\--ignore-dynu


  		





  
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  If given, all dynamic utilisation information will be ignored by


  		





  
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  assuming it to be 0. This option will take precedence over any data


  		





  
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  passed by the MonDs with the ``--mond`` and the ``--mond-data``


  		





  
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  option.


  		





  
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\--simulate *description*


  		





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  Backend specification: similar to the **-t** option, this allows


  		





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  overriding the cluster data with a simulated cluster. For details


  		












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