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Posts by Harri Liljeroos

Posts by Harri Liljeroos

1) Message boards : Number crunching : Welcome back/checking if everything is working? (Message 62868)
Posted 25 days ago by Harri Liljeroos
Post:
The trouble is your 1 year deadline is making my Boinc client put them on the back burner and do other tasks with shorter deadlines. I've had to manually suspend Primegrid tasks to let yours continue. Mind you that's also the fault of Boinc/Primegrid for giving me 3 weeks of processing to do when my buffer is set to 3 hours!

Boinc is designed to run tasks in FIFO order so that shorter deadline tasks don't take over the resources (CPU/GPU). Only exception is if Boinc thinks that a task is going to miss the deadline, then that task is expedited. But this happens only about 1 -1½ days before the deadline.
2) Message boards : Number crunching : Welcome back/checking if everything is working? (Message 62774)
Posted 9 Oct 2020 by Harri Liljeroos
Post:
There's quite a few batches of those, with only a small number left in each one.
I had a look at a few; some are "stuck", but some have just started running, and are returning trickles.

I'll see what the project thinks about wiping everything.


It would be great if some clean up happens. I have one orphaned Full Resolution Ocean since 2014 in my "In progress" web tab and set to expire in 2023. I'm almost there.

Can they do the wiping as they need to have all the old tasks available when counting the credits? So nothing can be purged?
3) Questions and Answers : Windows : black screen (Message 62635)
Posted 31 Jul 2020 by Harri Liljeroos
Post:
Do you have this setting enabled on you computing preferences: 'Leave non-GPU tasks in memory while suspended'? This should be set on as cpdn tasks usually don't like to be stopped and restarted from the last checkpoint. In this case tasks usually just error out but do not stop whole windows. Also make sure that the CPU temperatures don't get too high while processing.
4) Message boards : Number crunching : Uploading files fails (Message 62479)
Posted 22 May 2020 by Harri Liljeroos
Post:
My uploads our now mostly uploaded, usually not on first try, but eventually they do finish successfully.
5) Message boards : Number crunching : Uploading files fails (Message 62466)
Posted 22 May 2020 by Harri Liljeroos
Post:
The zips from new anz50 tasks from batch 871 fail to upload.
6) Message boards : Number crunching : New work Discussion (Message 62465)
Posted 22 May 2020 by Harri Liljeroos
Post:
Really don't understand the concern about "no posting" with a low RAC.
I'm a Mac user and the last job I was able to work on was in March, 2019. My RAC is 0.00 and yet I am still able to post...

Good that this has been taken care of. Boinc servers have had as a default rule to not allow to post in forums unless you have RAC > 1. That was to prevent junk posts from users who are not interested to do their bit for the project.
7) Message boards : Number crunching : New work Discussion (Message 62449)
Posted 21 May 2020 by Harri Liljeroos
Post:
This post is directly about the absence of new work for Windows machines, but about posting on these boards. Because no work has been available for some time now my RAC is now closing to 1 (1.69 currently) I am getting close to the limit when I can no longer post to the forums. I think the normal limit is that you have to have RAC >= 1 to post here. I hope that the limit is removed or lowered before Win only user are ruled out from posting here. The questions and answers section should be without this restriction, but that doesn't seem to exist in the current version of message boards.

(If this isn't a good thread for this, please feel free to move this post to an appropriate thread.)
8) Message boards : Number crunching : Work available and being requested but none downloaded (Message 62378)
Posted 30 Apr 2020 by Harri Liljeroos
Post:
There has been some changes as the server status page has a different layout now and the cakebox graphics don't understand the tables for tasks in progress for different sub-projects.
9) Message boards : Number crunching : What is "HadAM4 at N216 resolution v8.52"? (Message 62337)
Posted 22 Apr 2020 by Harri Liljeroos
Post:
I don't know where Boinc gets these cache values, but my I7-7820X shows here to have 256 KB cache and wikipedia shows L2 = 8 x 1024 KiB and L3 = 11 MiB.
10) Message boards : Number crunching : Server status page shows different numbers for tasks in progress (Message 62310)
Posted 15 Apr 2020 by Harri Liljeroos
Post:
So the server status page shows that there are about 63000 tasks in progress. But the sum of the individual sub-projects is below 45000. Does anybody know where the discrepancy comes from? I know that I have tasks on my list showing still 'In progress' although they were finished ages ago but server never acknowledged them finished usually because of some server side problems.
11) Message boards : Number crunching : "No tasks sent" (Message 62252)
Posted 22 Mar 2020 by Harri Liljeroos
Post:
That time limit would then be ideal for task deadline?
12) Message boards : Number crunching : "No tasks sent" (Message 62246)
Posted 19 Mar 2020 by Harri Liljeroos
Post:
Last larger batch of work for windows was at Jan 18-19. It lasted about 30 hours before it was gone. The ready to send queue peak was about 9000 tasks. Look here: http://ob.cakebox.net/cpdn_status/server_status.html It is a graphical view of server status with history included.
13) Message boards : Number crunching : Project url (Message 62215)
Posted 9 Mar 2020 by Harri Liljeroos
Post:
I'm still connected to http://climateprediction.net/ and haven't had any problems.
14) Message boards : Number crunching : Project url (Message 62213)
Posted 9 Mar 2020 by Harri Liljeroos
Post:
What is the situation of the new project url with https? When will the http url be expired? Now that we don't have any new tasks for windows or linux would be good to change that address if the old one will become obsolete soon.
15) Message boards : Number crunching : New work Discussion (Message 62129)
Posted 17 Feb 2020 by Harri Liljeroos
Post:
My RAC has drastically decreased but should be raising soon enough after playing with the config for CPDN.


I am not sure where CPDN sits in the tables for credit for time spent crunching. I know it isn't at the top but I suspect there are probably projects below it as well.

This comparison https://boinc.netsoft-online.com/e107_plugins/boinc/get_cpcs.php would suggest that CPDN gives less credits per CPU second compared to just about any other project. Probably it doesn't list all projects and includes projects using GPUs as well. At least it is missing the comparison between LHC and CPDN which are both CPU only projects that I participate in.
16) Message boards : Number crunching : New work Discussion (Message 62031)
Posted 24 Jan 2020 by Harri Liljeroos
Post:
If they really need to get those Linux tasks done, they could think about the VirtualBox environment of Boinc. Do what LHC@home is doing and create Linux VirtualBox machines with everything set up the way they want and need, and send them to the users for running. This could solve the 32 bit libraries problem as well.
17) Message boards : Number crunching : Scheduler request too recent (Message 61888)
Posted 3 Jan 2020 by Harri Liljeroos
Post:
I recall that the project does not actually use/need the deadlines. They are there just because BOINC environment requires to have one. The project wants to have the results returned asap but not all results are required to make meaningful science. The results will probably go through some statistical analysis before being used. When workunits, that are sent out again in case first recipient did not return it by deadline, they often have download errors because original files were already deleted from the server. This suggest to me that not all results are vital (otherwise they would not have been deleted) but of course if more results are returned in timely fashion it is better.
18) Message boards : Number crunching : Scheduler request too recent (Message 61884)
Posted 2 Jan 2020 by Harri Liljeroos
Post:
Yep, many projects want to have the cake and eat it too.
19) Message boards : Number crunching : Scheduler request too recent (Message 61879)
Posted 2 Jan 2020 by Harri Liljeroos
Post:
The suffering people in South Africa, Brasil, Iceland, Greenland, Australia, also Germany, and some dozen more countries disagree.
For example: The melting glacier and ice in Greenland is melting today five times faster than in the early 1990. And the loss of ice accelerates.
Is it correct as recapitulation, that after 30 years of ignorance, there is not much more time left?

The timescale we are talking about in distributed computing is irrelevant compared to how long it takes to make decisions about acting on climate change and it's consequences.
20) Message boards : Number crunching : Scheduler request too recent (Message 61875)
Posted 2 Jan 2020 by Harri Liljeroos
Post:
<soapbox> Which begs the question: If the people hoarding work units are not in this for the science but are in it for the points and if the points are meaningless outside of a scientific context then why are they bothering at all? The entire point of distributed computing projects is to get as many people as possible working to produce usable data as fast as possible. That is why I think CPDN specifically and BOINC in general need to take a step away from awarding points solely based on raw computational requirments and take a step towards giving bonus points for quick turnaround times. Look at Folding@Home. They have a Quick Return Bonus for certain work loads. This QRB helps them ensure a high level of constant turnaround from the people that are in it just for the points. If someone comes along that is just doing DC projects to advance the science (like me and several others on these forums) then they will be just as happy with the QRB as they would be without it or even without any points at all. </soapbox>

I disagree with you. In distributed computing the goal is to get results with the lowest possible cost. Time is not important. If you want to do it fast, use your own supercomputer or cluster.


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