Some questions

Message boards : Questions and problems : Some questions
Message board moderation

To post messages, you must log in.

AuthorMessage
Profile Keith Myers
Volunteer tester
Help desk expert
Avatar

Send message
Joined: 17 Nov 16
Posts: 863
United States
Message 102371 - Posted: 30 Dec 2020, 23:01:45 UTC - in response to Message 102370.  
Last modified: 30 Dec 2020, 23:06:15 UTC

Depends on the project how much storage is needed for tasks. Some projects only need kilobytes. Some projects need hundreds of gigabytes. Depends on the size of your work cache.

Also depends on the project how long any task runs. Different runtimes for cpu work. Different runtimes for gpu work. Different runtimes for different species of work within a plan_class and application.

Climate Prediction is one of the projects where a single work unit can take a year to process.

Other projects process work in under a minute. So you can't expect all BOINC projects to behave the same. Expect them to be all different from each other.

Welcome to BOINC!

[Edit]
You should let projects manage any work deletions. Most projects need at minimum some static app you agreed to process. Some projects need static parameter sets that are needed for any future work.

The only way to reclaim disk space is to reset or detach from a project once you are done with it.
ID: 102371 · Report as offensive
Profile Dave
Help desk expert

Send message
Joined: 28 Jun 10
Posts: 2516
United Kingdom
Message 102373 - Posted: 31 Dec 2020, 6:50:56 UTC

Climate Prediction is one of the projects where a single work unit can take a year to process.

Even on my old netbook with a dual core atom the last tasks I ran out of interest took only 6-8 months to run.

On my laptop with an Intel(R) Pentium(R) CPU N3540 @ 2.16GHz the longer ones take about 40 days. Same tasks on my Ryzen7 at stock settings take 6-7 days. However, the current Linux tasks use a lot of level3 cache and I only get an increased throughput of work up to running 6 out of 8 real cores. If I start using the virtual cores throughput actually reduces a little. On Linux I wouldn't advise running more than 1 or possibly 2 tasks at a time from CPDN unless you can allocate more disk space. Running 4 it is taking 7.5GB of disk space. I haven't had to do it yet on the Ryzen but occasionally when tasks crash they leave the task folder behind. I make a point of checking the disk usage from time to time and if it looks excessive, I go in and manually delete the task folders from crashed tasks.

It is also worth making sure you have enough RAM. In testing (they have yet to make it to the main site) OpenIFS tasks can use 6GB or even more of RAM each. They slow down dramatically if you run enough of them that they are constantly using swap.

The current crop of Windows tasks are not quite as demanding and you have much more disk space there. You may however on both, need to go into computing options and get rid of default restrictions on disk usage.
ID: 102373 · Report as offensive

Message boards : Questions and problems : Some questions

Copyright © 2024 University of California.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.