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Thread 'RAC of 9000+/- ... surely not right!'

Thread 'RAC of 9000+/- ... surely not right!'

Questions and Answers : Windows : RAC of 9000+/- ... surely not right!
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boinc

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Message 14406 - Posted: 15 Jul 2005, 15:49:35 UTC

Since the trickle \"problem\" was \"solved\" about 10 days ago, I\'ve been getting an average credit of around 9000 per day. While this is great, it isn\'t correct. However, I haven\'t seen anyone else complaining...

1. Does anyone else have a similar problem?

2. If not, what could be happening to my results?
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Profilegeophi
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Message 14407 - Posted: 15 Jul 2005, 15:58:51 UTC

The average credit for CPDN in BOINC has never worked well and continues on in that tradition. The recalculation that occurred a week or two ago after all the previous problems resulted in particularly goofy RACs. These may even out after a long time to something reasonable, or they may not. In CPDN, the only reliable indicator of work done is Total Credit, and that appears fine on your account.
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old_user1
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Message 14433 - Posted: 16 Jul 2005, 8:08:34 UTC - in response to Message 14407.  

I had thought I was using the appropriate "half life" calculation now for RAC (since we calculate it instead of BOINC). it's something I will eventually get right! I believe the problem may be applying the "half life" to the total credit for a result rather than the incremental fraction coming in for a time (i.e. the 98 credits per trickle and not the cumulative for being at, say, phase 3, timestep 54000 etc)
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boinc

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Message 14440 - Posted: 16 Jul 2005, 16:06:03 UTC - in response to Message 14433.  
Last modified: 16 Jul 2005, 16:11:18 UTC

Carl wrote: <I> I had thought I was using the appropriate "half life" calculation now for RAC (since we calculate it instead of BOINC). it's something I will eventually get right! I believe the problem may be applying the "half life" to the total credit for a result rather than the incremental fraction coming in for a time (i.e. the 98 credits per trickle and not the cumulative for being at, say, phase 3, timestep 54000 etc)</I>

I'm assuming you have "fixed" it as I'm now getting a more realistic RAC (90+/-).
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old_user1
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Message 14442 - Posted: 16 Jul 2005, 16:16:20 UTC - in response to Message 14440.  

&gt; I'm assuming you have "fixed" it as I'm now getting a more realistic RAC
&gt; (90+/-).

yeah, I just tried it, it's a semi-kludge but seems to give more normal #'s (CPDN, with trickles etc for credits has always been odd for RAC) -- what I do now is use their "half life exponential decay" applied to the average trickle date for trickles across a result, and then multiply that with the max credit the result has returned so far (i.e. the credis for the latest phase/timestep). so it seems to be sensible.
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boinc

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Message 14448 - Posted: 16 Jul 2005, 16:40:44 UTC - in response to Message 14442.  
Last modified: 16 Jul 2005, 16:41:06 UTC

&gt; yeah, I just tried it, it's a semi-kludge but seems to give more normal #'s...

Thanks
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Questions and Answers : Windows : RAC of 9000+/- ... surely not right!

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