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World Community Grid Forums
Category: Completed Research
Forum: Discovering Dengue Drugs - Together - Phase 2 Forum
Thread: DDDT-2 Work Unit distribution updated |
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Thread Status: Active Total posts in this thread: 121
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KWSN - A Shrubbery
Master Cruncher Joined: Jan 8, 2006 Post Count: 1585 Status: Offline |
Roundup, if you read the thread, [...]. Yes Sir. I request a hard but fair punishment  In the true spirt of the Knights Who Say Ni!, we will subject you to the harshest punishment of them all.... The comfy chair!!!  Distributed computing volunteer since September 27, 2000 |
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Ingleside
Veteran Cruncher Norway Joined: Nov 19, 2005 Post Count: 974 Status: Offline Project Badges: 
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I've posted a provisional update of Matrix in the Start Here forum and added a few columns which I'm hoping to fixed up with permanent data. Standard/Repair Deadlines A Type 20/8 B Type 8/3.2 C Type 10/4 Shouldn't it be 8/8 for A, and 7/2.8 for B, according to Kevin Reeds post. Reliability Return period and Valid Result Series columns were added. Previously knew of 4 days and 15 valid sequential results, it not 100% transparent to me what the DDDT-2 A/B are, thinking C will be same as all other WCG projects. There's not separate "reliable"-parameters for each sub-project, meaning a computer will either be reliable in all WCG-projects, or in none of them. Also, it doesn't matter in which sub-projects you'll get the valid tasks (or invalids), so you can example have 10 HCMD2, 15 HFCC, 20 Rice, 8 HCC, 12 HPF2, 9 FAH and 3 beta's to get the required 77 valid tasks to become "reliable". So, a new computers needs 77 valid tasks in a row to drop below the max_error_rate of 0.002. If has a single validation-error, the computer needs atleast 77 valid tasks in a row afterwards to get below 0.002 again... On top of this you'll need the max 2 days average turnaround-time, but even if it is higher, it's much easier to drop below 2 again than to crunch the 77 needed to decrease the error-rate.  "I make so many mistakes. But then just think of all the mistakes I don't make, although I might." [Edit 1 times, last edit by Ingleside at Mar 10, 2010 7:25:27 PM] |
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roundup
Veteran Cruncher Switzerland Joined: Jul 25, 2006 Post Count: 824 Status: Offline Project Badges: 
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[ot]
In the true spirt of the Knights Who Say Ni!, we will subject you to the harshest punishment of them all.... The comfy chair!!! Nooooo please, you can do anything but please please not the comfy chair   [/ot] |
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Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
Suggest you wait for the final matrix. 20/8 means as it says in the header, Standard Deadline A type 20 days, Repair Deadline 8 days. FURTHER, IF you'd read, you'd seen a note saying the 7 was increased to 8, consequently 2.8 would then become 3.2. The rest will resolve as an when the numbers have confirmed.
----------------------------------------Plz, no injections how you may have gotten it wrong or I got it wrong... there's enough to read already. edit: post quote v.v. B-Type Ingleside, the avg turnaround for the host is 2 days...but the work units will be given 8 (updated originally it was 7) days to return the work. Let me know if that is what you are curious about? -Uplinger [Mar 8, 2010 8:17:00 PM] edit: what better value to use than the one on a received B-Type download: 7 Days it is. http://www.worldcommunitygrid.org/forums/wcg/...28656_lastpage,yes#271142
WCG
----------------------------------------Please help to make the Forums an enjoyable experience for All! [Edit 2 times, last edit by Sekerob at Mar 11, 2010 7:56:46 AM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Now you've got me curious about how reliable my machine is rated.
Is there anywhere you can find out your reliability rating and average turn-around times? I had a look around but couldn't find it. Also, how long a period is the average turn-around time calculated over? Forever? the last n months/work-units? |
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Ingleside
Veteran Cruncher Norway Joined: Nov 19, 2005 Post Count: 974 Status: Offline Project Badges:
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Now you've got me curious about how reliable my machine is rated. Is there anywhere you can find out your reliability rating and average turn-around times? I had a look around but couldn't find it. In BOINC-projects, the average turnaround-time is displayed on the show_host.php-page for each computer, but WCG doesn't include this page so you can't see it here. The reliability-rating isn't shown anywhere... A computer is "reliable", if it gets assigned tasks with decreased deadline... Also, how long a period is the average turn-around time calculated over? Forever? the last n months/work-units? if you've got a task timing-out, the average will be set to how many days the original deadline on this task was. So, even if no-one gets more than 8 days deadline on an A-task, if you miss-out on the 8-day deadline on the A-task your average will be set to 20 days. As long as you don't exceed the deadline on any tasks, you can maybe say it's "forever", but the averaging is a 70/30-weight on old/new, so even if you're sitting with a 10-day average it will drop below 2 days after 7 tasks taking 1 day. "I make so many mistakes. But then just think of all the mistakes I don't make, although I might." [Edit 1 times, last edit by Ingleside at Mar 15, 2010 5:50:58 PM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I have some machines that are not always cruching WCG, but when they are they get short work so they must be rated reliable. If they then go offline for a week as far as WCG is concerned do they keep their rating when they next contact WCG for a wu? They wouldn't have returned work late just been out of touch with the grid for a week not requesting any work units.
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hello w0en,
As far as I know, your computers will still be considered reliable. The test is how a computer handles work assigned to it, not how often it requests work. Lawrence |
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Ingleside
Veteran Cruncher Norway Joined: Nov 19, 2005 Post Count: 974 Status: Offline Project Badges:
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Hello w0en, As far as I know, your computers will still be considered reliable. The test is how a computer handles work assigned to it, not how often it requests work. Lawrence Correct.  Just adding a little more info... Except if a task times-out and isn't returned by the deadline, all the updating of average turnaround-time is done by the Validator, so not crunching WCG for a month or something won't have any effects on the turnaround-time here at WCG. Since average turnaround-time is adjusted by the Validator, there can be some delay waiting on your wingman before it's updated. For new computers the average turnaround-time starts at zero, so you'll only need 1 validated task to get average turnaround-time within limits. But you'll also need to get low enough host.error_rate to be rated reliable, and for this you'll need atleast 77 validated tasks... BTW, for the users that does somehow manage getting an A-task, but uses more than 48 hours to crunch it, this normally won't lead to unreliable computer. A computer with 1-day average can return one 100-hour-task and still be reliable, or two 71-hour-tasks. Also, even if does return more A-tasks, chances are they won't be validated at once, so you'll get some other work validated between the A-tasks. And, as long as the "unreliable"-rating is only due to turnaround-time, it takes very few fast turnaround-tasks to get the average below 2 again.  "I make so many mistakes. But then just think of all the mistakes I don't make, although I might." |
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Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
If has a single validation-error, the computer needs atleast 77 valid tasks in a row afterwards to get below 0.002 again... Did you have a lapse, or where in the standard BOINC world is that documented to apply to WCG too? Remember, this is WCG where old world and new world sublimate into something overall vastly superior. Retention rate of 34% of BOINC members versus 16.9% for all the rest of BOINC standard projects is in that my reference, that's more than twice without a Reliability rating page.
WCG
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