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PostPosted: Tue Jan 06, 2009 12:16 am 
Brown Belt
Brown Belt

Joined: Sun Dec 14, 2008 2:38 pm
Posts: 335
I just want to know what the difference is between preferred and final deadlines?

On my current work unit, I am going to miss the preferred deadline but should be ok to meet the final deadline.

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PostPosted: Tue Jan 06, 2009 4:26 pm 
Mobo-fu Master
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The 'preferred' deadline points will be no different from the 'final' deadline points. But it is better to get the WU in within the preferred time limit. "Expediency" is the keyword.
Once the WU has gone beyond the 'final' deadline time, you will loose points. Maybe all, for that WU.
For any system with a minimal 2.0 Ghz CPU and 1 Gb of memory, running a nominal 14~16 hours daily, should get each one in within about 1/4 to 1/2 the 'preferred' time period.
Here is a quote on deadline periods from

Are there any limits to how long my machine can take to finish a work unit (WU)?

Yes. Work Units are serial in nature. When a completed WU is sent back, a new work unit is generated from those results. This must happen many times over within each project (group of work units). A generation 1 work unit must be turned in before a generaton 2 work unit is created and sent out.

To keep these generations moving along, we have to set expiration deadlines in the event a work unit is not uploaded in a timely manner (lost, deleted, whatever). These unfinished work units "expire" and are reassigned to new machines. You will still receive credit for all WUs completed and uploaded prior to the preferred deadline. However, after the preferred deadline, your contribution is not as useful scientifically because another copy of that work unit had to be sent out to another contributor. Even if you eventually complete the work unit, that other contributor still had to process duplicate work to assure the science moves forward. And it would be unfair not to also credit that second contributor.

Even so, full credit is given up until the final deadline. After the final deadline has expired, the client will automaticlly discard the work unit and download new work. If you have trouble completing work units before the preferred deadline, it is recommended to either run the FAH client more hours each day, or to run the client on a faster computer.

As we move to larger and longer WUs, we will extend the expiration time as needed. Deadlines vary on the order of a few days to a several weeks, depending on the nature of the WU. Turn in a work unit just before the deadline is not the goal. It is most helpful to the project to return work units as quickly as possible. And how these deadlines are determined is explained a few answers below.

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