Recent average credit (RAC)
4 Feb 2005 12:28:20 UTC
Topic 187445
(moderation:
I have a host that I detached some time ago, and the Recent Average Credit has remained the same. Shouldn't it decrease to zero?
PS: I remember seeing something about this in the BOINC mailing lists, but it seems it was not solved. I guess there are more pressing maters ;-)
Professor Desty Nova
Researching Karma the Hard Way
Recent average credit (RAC)
)
I'm not sure about your paticular case, but you may take into account two things:
- the time the credit is averaged of is, I think, set to a week. So if there is a decrease, it will be very slowly.
- a host that has been detached may have accumulated quite some Results that are pending to be validated (and assigned credit for), so it may still collect credit quite some time after it has stopped sending results.
BM
BM
How long ago was the host
)
How long ago was the host detached?
The RAC is only updated when you get new credit. If this does't happen for some time, the stats sites have to calculate the correct RAC.
"BOINC updates 'recent average credit' (RAC) only when new credit is granted. Interfaces that export RAC also export that time at which it was last updated. To obtain the current value of RAC, you must 'decay' it based on the time that has elapsed since it was updated"
Look at the bottom of this site: http://boinc.berkeley.edu/credit.php
or in de Stats mailing list (November).
Could this (the stats site doesn't calculate the RAC) be the reason for your RAC not to decrease? :-)
> I have a host that I
)
> I have a host that I detached some time ago, and the Recent Average Credit has
> remained the same. Shouldn't it decrease to zero?
>
> PS: I remember seeing something about this in the BOINC mailing lists, but it
> seems it was not solved. I guess there are more pressing maters ;-)
>
The comments below are very right,
Your figure in the XML for RAC will NOT change. It will only ever change when you return more work. So if last time you returned (say 3 months ago) work it was 100... it will still be 100 today.
BUT RAC is associated with a timestamp. That timestamp IS the last time your RAC was updated.
So what stats sites SHOULD do (and mine as well as most of the major ones do), is when showing RAC it should "DECAY" the RAC of 100, by using the current time stamp, as well as the timestamp in the XML (ie 3 months ago). By doing this you get your REAL RAC for right now.
I am not sure which site your getting the RAC high on... but simply let them know and they can address it.
Hope this helps
Cheers,
Zain
PS on my stats site you can see your stats at http://www.setisynergy.com/stats/boinc-stats.php?id=5372&project=eah but you have "Hidden" your hosts (this is default in Einstein) so your individual machines dont show up. If you unhide your hosts (in your account preferences) then you will see what I am talking about *smile*
---
Teamless? Drop by SETI Synergy and look around. Also checkout our famous BOINC World Stats
Thanks for all the info.
)
Thanks for all the info.
Professor Desty Nova
Researching Karma the Hard Way