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ATLAS application :
LHC shuts down, but simulation continues!
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Author | Message |
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Send message Joined: 13 May 14 Posts: 387 Credit: 15,314,184 RAC: 0 |
Hi all, After 4 years the LHC has finished its second run and is now shutting down for 2 years to be upgraded: https://home.cern/news/press-release/accelerators/lhc-prepares-new-achievements But don't worry, simulations required by physicists to analyse the data taken over the last 4 years will continue. We should always have plenty of ATLAS tasks to do so keep your machines crunching ATLAS and other LHC projects! |
Send message Joined: 18 Dec 15 Posts: 1688 Credit: 103,610,398 RAC: 120,706 |
keep your machines crunching ATLAS and other LHC projects!David, what "other projects" do we talk about: - Sixtrack has tasks available only once in a while - CMS has been stopped - LHCb also has been stopped (for monetary reasons, which is sad enough) - Theory has not been working well for many weeks, and it does not look like as if this will change soon. Which means that many crunchers with machines with low RAM (and no possibility to upgrade) will NOT be able to crunch LHC projects (for example: what concerns myself - only 2 out of my 5 PCs have more than 4GB RAM, with the other three I cannot crunch ATLAS because of only 4GB and 3 GB RAM). |
Send message Joined: 9 Dec 14 Posts: 202 Credit: 2,533,875 RAC: 0 |
Which means that many crunchers with machines with low RAM (and no possibility to upgrade) will NOT be able to crunch LHC projects (for example: what concerns myself - only 2 out of my 5 PCs have more than 4GB RAM, with the other three I cannot crunch ATLAS because of only 4GB and 3 GB RAM).Machines with 4GB RAM can crunch ATLAS native tasks (but it has to be at least 4GB RAM, otherwise you won't get tasks). |
Send message Joined: 18 Dec 15 Posts: 1688 Credit: 103,610,398 RAC: 120,706 |
Machines with 4GB RAM can crunch ATLAS native tasksthat's nice, but the OS of all my machines is Windows. I would be great if at least one of the subprojects other than ATLAS would have tasks - but this is not the case, unfortunately. |
Send message Joined: 9 Dec 14 Posts: 202 Credit: 2,533,875 RAC: 0 |
I would be great if at least one of the subprojects other than ATLAS would have tasks...Sooner or later there will be jobs/tasks be reliably available again. Just for your information: It seems like you have a PC connected to boinc that is running Windows Vista. Since Windows Vista isn't getting any security updates from Microsoft anymore, it's probably a bad idea to connect this PC to the internet. So you might consider upgrading to a newer Windows version or switch to a Linux based OS. |
Send message Joined: 24 Oct 04 Posts: 1127 Credit: 49,747,826 RAC: 10,427 |
Well I just reminded myself why I can't run Atlas on all of mine since just getting 2 tasks means this d/l |
Send message Joined: 15 Jun 08 Posts: 2411 Credit: 226,157,222 RAC: 128,493 |
You luckily got some smaller ones. Downloads can be up to 450 MB, uploads up to 250 MB per task. |
Send message Joined: 13 May 14 Posts: 387 Credit: 15,314,184 RAC: 0 |
Machines with 4GB RAM can crunch ATLAS native tasksthat's nice, but the OS of all my machines is Windows. Yes it is unfortunate that there are no tasks for other projects, but that is not under my control. I can only speak for ATLAS and say we should always have tasks, but I know that they are heavy to run and thus smaller hosts are excluded from any LHC tasks. |
Send message Joined: 24 Oct 04 Posts: 1127 Credit: 49,747,826 RAC: 10,427 |
Machines with 4GB RAM can crunch ATLAS native tasksthat's nice, but the OS of all my machines is Windows. Well the size of Atlas tasks don't always depend on the CPU or HD size and is a big problem with internet connection d/l - u/l speed/time |
Send message Joined: 14 Jul 05 Posts: 2 Credit: 626,464 RAC: 0 |
You luckily got some smaller ones. If you have a chance to install Linux and cvmfs to receive Atlas native tasks, the downloads will be smaller, too. And the RAM needed, as mentioned above. Good luck! |
Send message Joined: 15 Jun 08 Posts: 2411 Credit: 226,157,222 RAC: 128,493 |
You luckily got some smaller ones. No. It's the other way round what makes sense. Every ATLAS task (native and vbox) downloads an EVNT file (up to 450 MB) and uploads a HITS file (up to 250 MB). The sizes can be smaller depending on the batch that is currently calculated, e.g. 200/100 MB down/up. ATLAS native uses an independent local CVMFS instance that is mostly up to date, thus it needs not very much additional download. ATLAS vbox needs lots of downloads to setup the VM and to update it's degraded CVMFS cache (the vdi is from March 2017) every time you start a fresh VM. This comes on top of the (up to) 450 MB. |
Send message Joined: 14 Jul 05 Posts: 2 Credit: 626,464 RAC: 0 |
That's what I said. The word "no" is for conflicting information. I just said the same thing as you said. |
Send message Joined: 15 Jun 08 Posts: 2411 Credit: 226,157,222 RAC: 128,493 |
... I just said the same thing as you said. It's not the same thing. I stated: downloads/uploads can be up to 450/250 MB per task. That was in reference to MAGIC's download picture. You stated: this could be reduced by using Linux and the native ATLAS app. Your statement is wrong. See my explanation. |
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