Questions and Answers : Windows : RAC of 9000+/- ... surely not right!
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Send message Joined: 31 Aug 04 Posts: 15 Credit: 1,618,288 RAC: 0 |
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? |
Send message Joined: 7 Aug 04 Posts: 2187 Credit: 64,822,615 RAC: 5,275 |
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. |
Send message Joined: 5 Aug 04 Posts: 907 Credit: 299,864 RAC: 0 |
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) |
Send message Joined: 31 Aug 04 Posts: 15 Credit: 1,618,288 RAC: 0 |
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+/-). |
Send message Joined: 5 Aug 04 Posts: 907 Credit: 299,864 RAC: 0 |
> I'm assuming you have "fixed" it as I'm now getting a more realistic RAC > (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. |
Send message Joined: 31 Aug 04 Posts: 15 Credit: 1,618,288 RAC: 0 |
> yeah, I just tried it, it's a semi-kludge but seems to give more normal #'s... Thanks |
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