Changes between Version 4 and Version 5 of ValidationSummary

Timestamp:

Jun 10, 2008, 9:33:32 AM (16 years ago)

Author:

davea

Comment:

--

ValidationSummary

@@ -1 +1 @@
 = Validation, credit, and replication =
 
-A computational result consists of:
+The execution of a job produces:
 
- * The result itself (the output files)
+ * The output files;
  * The amount of CPU time used; this may be used to determine how much credit to grant for the result.
 
-In general, neither of these can be trusted:
+In general, neither of these can be trusted, because:
 
- * Some hosts have hardware problems (consistent or sporadic) that cause errors (usually in floating-point computation).
- * Some volunteers may maliciously return wrong results; they may even reverse-engineer your application, deciphering and defeating any sort of internal validation mechanism you might include in it.
+ * Some hosts have consistent or sporadic hardware problems, typically causing errors in floating-point computation.
+ * Some volunteers may maliciously return wrong results; they may even reverse-engineer your application, deciphering and defeating any internal validation mechanism it might contain.
  * Some volunteers may return correct results but falsify the CPU time.
 
 BOINC offers several mechanisms for validating results and credit.
 However, there is no "one size fits all" solution.
-The choice depends on your requirements,
-and on the nature of your applications
+The choice depends on your requirements, and on the nature of your applications
 (you can use different mechanisms for different applications).
 
@@ -22 +21 @@
  * A "validator", which decides whether results are correct;
  * An "assimilator", which handles validated results
-
-PICTURE: different validator/assim for different apps
 
 BOINC provides examples of each of these,