1) Message boards : News : New ATLAS app version released for Linux hosts (Message 31937)
Posted 13 Aug 2017 by Profile Olivier Fehr
Post:
@Ivan, Jim1348

It's a bit OT here, therefore only some very short remarks.

CERN's vbox apps can get a huge benefit from a local squid.
CMS benefits most, then ATLAS and LHCb, Theory less but sufficient.
Up to 95 % regarding the request hits and 50 % regarding the byte hits.
The setup needs some special tuning compared to the standard setup and should get some assist from iptables.

An "old" computer with a core 2 duo, 1-2 GB RAM (250-350 MB for squid), 30-80 GB free disk space is far enough.
And there is also a benefit for fast DSL lines as the squid avoids latency.


Thanks for that insight. I going to try this, since I have a squid running already.
2) Message boards : News : New ATLAS app version released for Linux hosts (Message 31931)
Posted 12 Aug 2017 by Profile Olivier Fehr
Post:
That's a success. I have both Singularity and CVMFS software up and running on both CentOS 7.3 and Ubuntu 17.04. Now lets see if I can get any of the new Atlas packages...
3) Message boards : News : New ATLAS app version released for Linux hosts (Message 31930)
Posted 12 Aug 2017 by Profile Olivier Fehr
Post:
Indeed, there is a Singularity package (named singluarity-container) for Ubuntu 17.04. It is version 2.2 while the latest Singularity version on the website is at 2.3.1. Since there have been 2 security related updates since, one labeled as moderate the other as high severity issue, I thought it worthwhile to compile the latest version from source.
As for the CVMFS, I'll make an attempt to compile it on Ubuntu 17.04 as soon as I can.
4) Message boards : News : New ATLAS app version released for Linux hosts (Message 31924)
Posted 11 Aug 2017 by Profile Olivier Fehr
Post:
Singularity compiled successfully on Ubuntu 17.04 and CentOS 7.3 boxes. Still have to implement the CVMFS part though.
MODIFY: CVMFS installed sucessfully too on CentOS.
5) Message boards : News : No RESULTS accepted from Linux Kernel 4.8.* (Message 31605)
Posted 24 Jul 2017 by Profile Olivier Fehr
Post:
Don't worry about Vbox - I think I have that figured out now. I was just wondering yesterday if the aborted tasks were due to my configuration changes or something else, but that question has been answered now. Thanks for your efforts.
6) Message boards : Cafe LHC : Gridcoin related posts (Message 31604)
Posted 24 Jul 2017 by Profile Olivier Fehr
Post:
Saw that when testing Gridcoin. Odd decision on their part. Basically, they didn't change the old url in their project https://cryptocurrencytalk.com/topic/49386-lhchome/#comment-392257
I'll stick with lhc@home. Gridcoins don't cover my electricity bill for crunching anyways...
7) Message boards : Number crunching : All running ATLAS and CMS tasks "aborted by project" - why so? (Message 31574)
Posted 23 Jul 2017 by Profile Olivier Fehr
Post:
Same experience here - on several different platforms. As an temporary 'emergency' measure, I've stopped accepting new tasks from LCH@home until I know what's going on...
https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=4362&postid=31564#31564
8) Message boards : News : No RESULTS accepted from Linux Kernel 4.8.* (Message 31564)
Posted 23 Jul 2017 by Profile Olivier Fehr
Post:
I have had a couple of tasks 'aborted by project' today also on Windows and Ubuntu hosts. Both worked fine (I thought) before. I also have two Fedora (one 25 and one 26 servers) that I am struggling to make VBox work on, Tasks on CentOS 7.3 on the other hand are running just fine, Windows and Ubuntu Boxes were those with tasks cancelled.Did anything change lately or is it me?
9) Message boards : CMS Application : CMS Simulation 47.60 (Message 30613)
Posted 3 Jun 2017 by Profile Olivier Fehr
Post:
Newbie question: My computers are currently running several tasks from this application and since I am a curious person, I wonder how I can find out more about this simulation. Is there a details page for it or a contact given somewhere? How do I find out in general what these tasks my computers are crunching are actually about?
Thanks.



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