Message boards :
Number crunching :
RAC how is it calculated
Message board moderation
Author | Message |
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Randy Hancock ![]() Send message Joined: 10 Aug 06 Posts: 169 Credit: 220,579 RAC: 0 ![]() |
Mine keeps going up by a 100 or so every day since I started optimized apps the universe is to big to just have life on one planet |
![]() ![]() Send message Joined: 13 Oct 00 Posts: 611 Credit: 2,025,000 RAC: 0 ![]() |
There is an article in the unofficial BONIC Wiki about the calculation of the RAC. Hope this helps. Cheers Andy |
![]() Send message Joined: 2 Aug 00 Posts: 1851 Credit: 5,955,047 RAC: 0 ![]() |
I believe it is roughly 1/2 the past week's credits plus 1/4 the previous week's credits + 1/8 the third week back's credits and so forth, all divided by seven to express it as a daily rate. |
![]() ![]() Send message Joined: 8 Nov 00 Posts: 101 Credit: 1,282,556 RAC: 0 ![]() |
I didn't even know what RAC meant - I do now! So basically those with higher RACs are crunching data at a higher rate. |
fpiaw Send message Joined: 29 Dec 99 Posts: 236 Credit: 1,203,409 RAC: 0 ![]() |
Thanks for the info. I was also interested in how RAC was calculated. Thanks, Chris. ![]() |
![]() Send message Joined: 2 Aug 00 Posts: 1851 Credit: 5,955,047 RAC: 0 ![]() |
Data crunch rate is proportional to the RAC with the provision that RAC is a delayed and smoothed measure of average daily credit. RAC is analogous to the exponential moving average (I believe) of the price (or other characteristic) of a stock, commodity, bond index or the Dow, etc. It shows a (delayed) trend of that price, etc, while the price itself hops up and down like its posterior is on fire. |
![]() ![]() Send message Joined: 14 Jul 03 Posts: 3224 Credit: 4,603,826 RAC: 0 ![]() |
Remember RAC also means, validated units. So units that are not yet validated are not calculated. This is what causes fluctuation. You may send back 50 results a day, one day get all 50 validated, one day only have 20 validated. So the RAC will bounce sometimes by pretty good numbers. Outages also affect this number. So, use it only as a half hearted guideline. If it drops a lot, start looking around to see what factors have happened, if nothing like an outage, or a lot of extra pending, then start seeing if a machine has been hosed. It's a nice theory number, but not very good for accuracy. ![]() My movie https://vimeo.com/manage/videos/502242 |
![]() ![]() Send message Joined: 17 Dec 99 Posts: 4215 Credit: 3,474,603 RAC: 0 ![]() |
I didn't even know what RAC meant - I do now! Think of it as a speedometer, the faster you crunch and get units credited, the higher your rac. It is cumulative, so the more cpus on the same account the higher the rac. Click on my name on the left and you will be able to see that I have 22 pc's crunching, hence the high rac. ![]() |
DryHeat [SETI.USA] Send message Joined: 29 Apr 03 Posts: 79 Credit: 280,191 RAC: 0 ![]() |
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![]() ![]() Send message Joined: 13 Oct 00 Posts: 611 Credit: 2,025,000 RAC: 0 ![]() |
Mine keeps going up by a 100 or so every day since I started optimized apps ...as I told Randy in this message... |
Randy Hancock ![]() Send message Joined: 10 Aug 06 Posts: 169 Credit: 220,579 RAC: 0 ![]() |
I have windows xp professional x64 hence 32 bit apps like the optimizer won't always work the universe is to big to just have life on one planet |
![]() ![]() Send message Joined: 8 Dec 05 Posts: 630 Credit: 59,973,836 RAC: 0 ![]() |
I have windows xp professional x64 hence 32 bit apps like the optimizer won't always work Nearly all 32 bit apps will run on x64, unless the installation program doesn't recognise the OS and won't continue! Simon's 32 bit apps do run on x64. |
DryHeat [SETI.USA] Send message Joined: 29 Apr 03 Posts: 79 Credit: 280,191 RAC: 0 ![]() |
I have windows xp professional x64 hence 32 bit apps like the optimizer won't always work I verified this last night when I did a dual boot with x64 and installed Chicken's apps on my E6300. It will be interesting to compare the results to the 32-bit whenever Boinc finally downloads them. ![]() |
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