2002-11-07 19:31:34 +00:00
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<title>Generating work</title>
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2002-08-20 23:54:17 +00:00
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<body bgcolor=ffffff>
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<h2>Generating work</h2>
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<p>
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2002-08-19 18:43:10 +00:00
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Workunits and results can be created using either a utility program
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or a C++ function.
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In either case you must first <a href=key_setup.html>generate a key pair</a>
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for file upload authentication.
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<hr>
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The utility program is
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<pre>
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create_work
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-appname name // application name
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-wu_name name // workunit name
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-wu_template filename // WU template filename
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-result_template filename // result template filename
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-nresults n // # of results to create
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-db_name x // database name
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-db_passwd x // database password
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-upload_url x // URL for output file upload
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-download_url x // base URL for input file download
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-download_dir x // where to move input files
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-rsc_fpops x // est. # floating-point ops
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-rsc_iops x // est. # integer ops
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-rsc_memory x // est. RAM working set size, bytes
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-rsc_disk x // est. disk space required
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-keyfile x // path of upload private key
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-delay_bound x // delay bound for result completion
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infile_1 ... infile_m // input files
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</pre>
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<p>
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The workunit template file is processed as follows:
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<ul>
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<li>
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Within a <file_info> element,
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<number>x</number> identifies the order of the file.
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It is replaced with elements giving
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the filename, download URL, MD5 checksum, and size.
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file.
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<li>
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Within a <file_ref> element,
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<file_number>x</file_number> is replaced with the filename.
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</ul>
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<p>
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The result file template is macro-substituted as follows:
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<ul>
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<li>
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<OUTFILE_n> is replaced with a string of the form
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"wuname_resultnum_n" where wuname is the workunit name and resultnum is
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the ordinal number of the result (0, 1, ...).
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<li>
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<UPLOAD_URL> is replaced with the upload URL.
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</ul>
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<p>
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<hr>
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<p>
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2003-01-09 21:48:33 +00:00
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The C++ library (backend_lib.C,h) provides the functions:
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<pre>
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int read_key_file(char* path, R_RSA_PRIVATE_KEY& key);
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int create_work(
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WORKUNIT&,
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char* wu_template, // contents, not path
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char* result_template_filename, // path
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int nresults,
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char* infile_dir, // where input files are
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char** infiles, // array of input file names
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int ninfiles
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R_RSA_PRIVATE_KEY& key, // upload authentication key
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char* upload_url,
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char* download_url
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);
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</pre>
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<p>
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<b>read_key_file()</b> reads a private key from a file.
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Use this to read the file upload authentication key.
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<p>
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<b>create_work()</b>
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creates a workunit and one or more results.
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The arguments are similar to those of the utility program;
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some of the information is passed in the WORKUNIT structure,
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namely the following fields:
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<pre>
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name
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rsc_fpops
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rsc_iops
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rsc_memory
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rsc_disk
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delay_bound
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</pre>
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