Changes between Initial Version and Version 1 of JobEst

Timestamp:

Jul 13, 2011, 3:47:51 PM (14 years ago)

Author:

davea

Comment:

--

JobEst

@@ +1 @@
+= Estimating job resource requirements =
+
+== Computation ==
+
+The computational size parameters ('''rsc_fpops_est''', '''rsc_fpops_bound''')
+are expressed in terms of number of floating-point operations.
+For example, suppose a job takes 1 hour to complete on a machine with a
+Whetstone benchmark of 1 GFLOPS;
+then the "size" of J is 3.6e11 FLOPs.
+
+To get an initial estimate of job size,
+run several typical jobs on your own computer, see how long they take,
+and multiply by the Whetstone score of the computer
+(to find this, run BOINC on the computer and look at the event log).
+
+It's possible that job size may change over time,
+or that job sizes on volunteered computers are different
+from those you measure on your own computers.
+To get estimates of job sizes averaged over recent jobs,
+use the script html/ops/job_times.php (the '''FLOP count statistics''' link on your project's [HtmlOps administrative web interface]).
+
+'''NOTE''': BOINC maintains various statistics, used for runtime estimation and credit,
+that are normalized by '''rsc_fpops_est'''.
+If you change this by a lot (more than a factor of 10)
+you should reset these statistics.
+To do so, click '''Manage Applications''' in the administrative web interface;
+click on the application name, then on '''reset credit statistics for this application'''.
+
+If job sizes vary in a predictable way,
+you can supply per-job values for '''rsc_fpops_est''' and '''rsc_fpops_bound'''.
+Doing so will give more accurate runtime estimates
+and more consistent credit.
+
+== Memory ==
+
+To get an initial estimate, run a typical job on your own computer
+and monitor the working set size
+(using the Windows Task Manager or the Unix "top" command).
+Note: memory size parameters are not per-platform;
+you should do this all supported platforms and take the maximum.
+
+== Disk ==
+
+To get an initial estimate, run a typical job on your own computer
+and observe the disk usage (including the input files, temp files, and output files,
+but not including the application files).