Message boards : Number crunching : Internet continuity task dependency
Message board moderation

To post messages, you must log in.

AuthorMessage
carmar

Send message
Joined: 13 Apr 20
Posts: 10
Credit: 55,767
RAC: 1
Message 47244 - Posted: 12 Sep 2022, 18:07:29 UTC
Last modified: 12 Sep 2022, 18:08:15 UTC

Hi, all.
Barring six track, how long can my machine be offline for a task to be failed?
So, if a task is started and I have to go offline midway, by when do I have to get back online for the task to continue? Does this vary by application?
ID: 47244 · Report as offensive     Reply Quote
Crystal Pellet
Volunteer moderator
Volunteer tester

Send message
Joined: 14 Jan 10
Posts: 1332
Credit: 8,781,879
RAC: 5,205
Message 47246 - Posted: 13 Sep 2022, 6:21:36 UTC - in response to Message 47244.  

Only ATLAS and CMS need an uninterrupted internet connection.
Not the whole truth: An interuption of about 20 minutes is tolerated.

Sixtrack and Theory can stay offline several days.
ID: 47246 · Report as offensive     Reply Quote
computezrmle
Volunteer moderator
Volunteer developer
Volunteer tester
Help desk expert
Avatar

Send message
Joined: 15 Jun 08
Posts: 2451
Credit: 233,445,463
RAC: 148,866
Message 47247 - Posted: 13 Sep 2022, 7:15:38 UTC - in response to Message 47244.  

It should also be mentioned that

1.
ATLAS native must not be paused/interrupted.
It does not support checkpointing and will restart from scratch at every resume.

2.
Theory native requires special settings to support pausing (but not a BOINC shutdown) which only works for cgroups v1.
It also occasionally sends out tasks that require several GB RAM (too much for this computer).

3.
According to Intel the CPU used in this computer dos not support VT-x which would be a must to run VirtualBox based tasks from LHC@home.


This leaves only SixTrack that can/should be run from here.
ID: 47247 · Report as offensive     Reply Quote
carmar

Send message
Joined: 13 Apr 20
Posts: 10
Credit: 55,767
RAC: 1
Message 47250 - Posted: 13 Sep 2022, 14:42:14 UTC - in response to Message 47247.  

Thanks much to you both.

@computezrmle: I had tried a couple of tasks a while back cancelled when I saw the run times - if I recall, they were Atlas. So, it may be possible to run some Virtualbox tasks. Your RAM observation is interesting, as is the start from scratch for Atlas. Would you think it worth it to give CMS a try?
ID: 47250 · Report as offensive     Reply Quote
computezrmle
Volunteer moderator
Volunteer developer
Volunteer tester
Help desk expert
Avatar

Send message
Joined: 15 Jun 08
Posts: 2451
Credit: 233,445,463
RAC: 148,866
Message 47251 - Posted: 13 Sep 2022, 15:30:39 UTC - in response to Message 47250.  

I doubt any of the vbox tasks will really work.
You may get them downloaded but they will fail since hardware virtualization support from the CPU is a must.
CMS is one of them.

Your recent ATLAS tasks were ATLAS native but they were not reported back before the deadline.
ID: 47251 · Report as offensive     Reply Quote
carmar

Send message
Joined: 13 Apr 20
Posts: 10
Credit: 55,767
RAC: 1
Message 47252 - Posted: 13 Sep 2022, 15:39:06 UTC - in response to Message 47251.  

Thanks. I’ll stick to six track.
ID: 47252 · Report as offensive     Reply Quote
Erich56

Send message
Joined: 18 Dec 15
Posts: 1722
Credit: 107,926,495
RAC: 79,590
Message 47255 - Posted: 13 Sep 2022, 19:29:29 UTC - in response to Message 47252.  

Thanks. I’ll stick to six track.
which will not make you very happy, though. Because Six Track tasks are available only once in a while :-(
ID: 47255 · Report as offensive     Reply Quote
carmar

Send message
Joined: 13 Apr 20
Posts: 10
Credit: 55,767
RAC: 1
Message 47256 - Posted: 13 Sep 2022, 20:18:49 UTC - in response to Message 47255.  

Yeah, I noticed that too. I’ll just have to make do with other Projects.
ID: 47256 · Report as offensive     Reply Quote
KAMasud

Send message
Joined: 7 Oct 06
Posts: 114
Credit: 23,192
RAC: 0
Message 48078 - Posted: 10 May 2023, 10:22:18 UTC

Power failures and Internet failures crash my tasks. Now I have opted out of Atlas and CMS. Are there any other tasks sensitive to power failures and Internet failures?
ID: 48078 · Report as offensive     Reply Quote
computezrmle
Volunteer moderator
Volunteer developer
Volunteer tester
Help desk expert
Avatar

Send message
Joined: 15 Jun 08
Posts: 2451
Credit: 233,445,463
RAC: 148,866
Message 48079 - Posted: 10 May 2023, 12:39:31 UTC - in response to Message 48078.  

Currently the only subproject from LHC@home that does not require permanent internet access is SixTrack.
It will be superseded by Xtrack some day (no idea when), hence sends out tasks only sporadically.
ID: 48079 · Report as offensive     Reply Quote
KAMasud

Send message
Joined: 7 Oct 06
Posts: 114
Credit: 23,192
RAC: 0
Message 48080 - Posted: 10 May 2023, 13:24:40 UTC - in response to Message 48079.  

Currently the only subproject from LHC@home that does not require permanent internet access is SixTrack.
It will be superseded by Xtrack some day (no idea when), hence sends out tasks only sporadically.

___________________________

Do you mind if I crash other tasks? It is a shame crashing them after they have run 22 hours.
ID: 48080 · Report as offensive     Reply Quote

Message boards : Number crunching : Internet continuity task dependency


©2024 CERN