Adam's Questions about RAC (moved to a new thread)

Gary Roberts
Gary Roberts
Moderator
Joined: 9 Feb 05
Posts: 5851
Credit: 110690655465
RAC: 32531122
Topic 193912

Hi,

I have a computer Created: 9 Sep 2008 11:32:54 UTC
They work all time for einstein
reported done Time reported: 10 Sep 2008 5:54:28 UTC
granted credit = 222,75

but in http://einstein.phys.uwm.edu/hosts_user.php
Avg. credit = 21.24, Total credit = 222

I have a question WHY avg. credit is 21 ?

total credit / day = avg. credit per day - it's true ?

I have another one computer Created 5 Sep 2008 11:56:43 UTC
in http://einstein.phys.uwm.edu/hosts_user.php
Total credit = 1333, Avg. credit = 105.50

1333 / 5 = 266 but not 105

sorry for my english

Cheers,
Gary.

Jord
Joined: 26 Jan 05
Posts: 2952
Credit: 5779100
RAC: 0

Adam's Questions about RAC (moved to a new thread)

Quote:
total credit / day = avg. credit per day - it's true ?


No, there's a decay in there as well. Else your RAC could grow without boundaries.
The formula used is

RAC(new) = RAC(old)*d(t) + (1-d(t))*credit(new)

Where d(t) is the decay function, and t is the time (in seconds) since the last Recent Average Credit recalculation.

See Recent Average Credit for more information.

Gundolf Jahn
Gundolf Jahn
Joined: 1 Mar 05
Posts: 1079
Credit: 341280
RAC: 0

RE: ... I have a question

Quote:

...
I have a question WHY avg. credit is 21 ?

total credit / day = avg. credit per day - it's true ?
...
Total credit = 1333, Avg. credit = 105.50

1333 / 5 = 266 but not 105
...


The formula for RAC is a bit more complex. It is explained at the Unofficial BOINC Wiki.

Gruß,
Gundolf

[edit] too late again :-) [/edit]

Computer sind nicht alles im Leben. (Kleiner Scherz)

SzB
SzB
Joined: 13 May 08
Posts: 1
Credit: 84534728
RAC: 0

Sorry, I'm not readed this

Sorry, I'm not readed this FAQ :(

Thanks for all

Gary Roberts
Gary Roberts
Moderator
Joined: 9 Feb 05
Posts: 5851
Credit: 110690655465
RAC: 32531122

I moved these messages to a

I moved these messages to a new thread as they have nothing to do with David Hammer's Webpage thread.

Cheers,
Gary.

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