[BOINC] [物理类] LHC@Home

Youth

New assimilator and validator installed. Let us know if there is still problems with host corruption. If your host is corrupt try resetting the venue under your preferences.

安装了新的任务回收及判别程序。如果发现问题请通知我们，同时可以试试重置相关的个人参数。

Youth

The problem seems to be cured. There is still some trouble with the daily allowance. Hopefully this will clear automatically within the next 24 hours. If it does not we will try a manual intervention.

原来的问题似乎已经解决了。每日限额似乎还有些问题，希望在24小时后会自动解决，如果不行，我们将尝试手动干预。

Youth

HTML tags in the message boards have been converted to BBCODE. Please let us know if it worked.

论坛上中HTML标记已经转换成了BBCode，欢迎大家到论坛反映相应问题。

Youth

The current group of studies is coming to an end. Small bunches of workunits will be created as we finish off the studies. There will probably be a pause while the results are studied.

目前的研究工作即将结束，最后将有一些小的任务包。当所有工作完成后项目可能会暂停一段时间。

Youth

A study of over 600'000 jobs have been finished and will be discussed tomorrow. Next week we will let you know what is planned for christmas and the future.

超过60万的任务包已经完成，将在明天进行讨论。下周你们将可以知道项目在圣诞节及以后的计划。

vmzy

12/19/2005
CHRISTMAS AND FUTURE PLANS: Just received from the LHC accelerator physicists: "The results from the recent tracking campaign have been presented in our meeting last Friday. The presentation was well received and it was decided to continue with another massive study after Christmas, using a slightly different set of parameters. The foreseen study will need about the same computing resources as the one just completed. Maybe more, probably not less. The results of the previous study will be presented at the forthcoming Particle Accelerator Conference 2006 in Edinburgh." Happy Christmas and thanks from CERN to all LHC@home volunteers!

2005年12月19日
圣诞节和未来规划：刚从LHC加速器物理学家传来的消息：“上星期五在我们的会议已经发布了最近的跟踪研究数据的计算结果。结果得到了大家的一致赞同，并决定在圣诞节以后继续开始一个新的使用另一套稍微有些不同的参数的大型研究。预计研究需要的计算量大致和刚完成的那个相同。可能更多，但不会更少。早先全部研究的结果将在即将在爱丁堡召开的2006年粒子加速器会议上发表。”祝大家圣诞节快乐，CERN由衷的感谢所有LHC@home的志愿者！

Youth

We have work, and the feeder is back online.

我们已经生成了新的任务，相应的服务程序也开启了。

Youth

A short update on what is happening can be found in the message boards here

官方关于项目近期情况的一个说明：
http://lhcathome.cern.ch/forum_thread.php?id=2056

Youth

Since you all seem interested here is a little progress report and a look at the future of lhc@home.

Servers:
We have received our new LHC@home servers. Two new dual 3.0 GHz machines. Unfortunately there is a problem with the disks. The disks ids are reordered during the installation process, so that after a reboot the system will try to boot the wrong disks. This can be fixed manually, but this is a problem for the automatic system at CERN. Whenever a security upgrade is needed or some hardware has failed and been replaced the system does a complete reinstall of the servers system disk. It would then require manual interaction to get it to run again. We are hoping to have this problem solved soon.

Sixtrack:
Sixtrack will continue to run with many small studies. Eric MacIntosh is looking into porting a new version of sixtrack to BOINC. This new version will have new physics modelling and beam collimation.

New Apps:
Garfield, a drift chamber simulation, has been ported to BOINC and tested. At the moment it is running on the 100 recycled farm servers we were given by the computer centre. We are now waiting for an official request for resources from ATLAS and other experiments. If we have enough request we will look into
porting garfield to windows and moving it to LHC@home.

Pythia and ATLFast have also been ported to boinc.

Pythia is an event generator used by all the experiments at CERN. The idea was to use it in LHC@home to create a database of good noise[1]. ATLFast is a fast and reduced version of the full ATLAS simulation software. This could be used to do preliminary event reconstruction on LHC@home once the LHC is running.

Africa@home:
The Malariacontrol project has been spun-off from CERN. The servers have been relocated to the university of Geneva and to STI in Basel for the beta phase. To learn more about the project go to Africa@home. We are now looking for other projects to run within the africa at home project.

The future:
Sixtrack will continue to run for the time being and we hope to launch more applications. LHC@home will continue also after the LHC starts running, whether it will run sixtrack, one of the new apps or a mixture has not been decided yet.

We would like to have some summer students work on LHC@home related projects, so if you are a CS student and interested have a look at the student programme. On a more personal note I will leave Cern at the end of the month. I do not yet know who will take over the day to day server administration, but i expect Ben will look in on the message boards from time to time.

[1] good noise is important for the physicist. They have to pick out the one interesting interaction from a bunch of other events and maybe even outside sources like cosmic radiation. They therefore need to tune their simulations using generated noise.
____________
Chrulle
LHC@home developer

alexpon

转贴
http://www.ithome.com.tw/itadm/search/search.php?key=LHC&r1=1 <---新闻来源
全球LHC网格运算明年正式启用  
文/林文彬 (记者) 2006-06-08


欧洲粒子物理研究中心的强子对撞机，明年将正式运用网格技术来负责实验后端资料的处理。



位于瑞士的欧洲粒子物理研究中心（CERN），花费多年建造的强子对撞机（Large Hadron Collider；LHC），将于明年开始正式运作，负责后端资料运算与储存的全球网格系统也将正式启动，目前参与这个全球网格运作的成员都正紧锣密鼓进行准备工作，台湾中研院就是其中之一。

为了探索物质的起源，LHC的实验透过大能量的撞击，分析粒子的最小单元，实验中将产生庞大的资料，需要运算、分析、储存，这不是单一国家与资源就可以运作，2002年该组织决定运用网格技术来负责后端资料的处理，成立了全球LHC网格计算（World-wide LHC Computing Grid；WLCG）组织，至今WLCG计划已集合全球的运算环境，共有40多国参与，明年的LHC开始运作后，将会是大规模网格运算的实际运用。中央研究院网格计算计划主持人林诚谦表示，这背后的资料量，一年累积下来将达到15 PB，用到的硬碟排列起来有40公里长。

WLCG是以3层架构运作，从核心到外围分别是Tier-0、Tier-1与Tier-2， CERN位于Tier-0中心，经过处理后的资料则分散于全球10个Tier-1中心，在亚洲地区只有台湾的中央研究院属于Tier-1成员，除了中央研究院外，德国、法国、义大利、英国等国家也是Tier-1的中心，由这10个Tier-1的中心，建构成不中断的全时区全球网格服务，提供稳定的网路计算与资料储存服务。在这Tier-1之下为Tier-2中心，则是提供个别的研究人员与科学家进行特定的模拟计算及分析的服务，目前共有200个单位与39国家参与Tier-2的中心。

中研院是在2003年加入这个全球网格运算计划，与世界各国共同努力建立全球的网格系统，未来中研院将负责1╱10的资料量的储存。中研院在这个计划涉入很深，这两年也负责协助其他地区建立网格运算环境，如东南欧的网格系统的建立就是CERN委托台湾派人去协助兴建。

为了支援这个网路运算中研院，打造了台湾最大的资料储存中心，该中心虽然位于地底下，由于位在海拔13～14公尺，因此不会淹水，资料储存安全性高，林诚谦表示，预计在2008年至少达到2PB硬碟与3PB的磁带，该中心也将透过4000～5000台PC的运算能力来处理这些庞大资料。为了维持网格运算的资料传输，目前的传输量为120 MB╱s，未来将达到600 MB╱s。

目前中研院的网格运算小组共可分4个小组，其中网格系统部署及维运管理小组，负责监控全亚洲地区的系统建置与维运，并协助亚洲国家建构网格系统，如韩国是Tier-2中心，台湾必须协助其系统的运作。此外，为了维持24×7不中断的运作，在全世界如欧洲、美洲与亚洲各有一个主要中心，台湾为亚洲的主要中心，负责亚洲地区系统服务的协助。

由于目前网格运算主要使用于高能物理的研究上，应用系统及中介软体开发小组为了拓展不同领域去使用网格运算，如大气科学上运用网格资源就特别需要储存的功能，该小组提供给不同领域不同的技术与支援，提供特制化的服务。文⊙林文彬

个人疑问 ??
GB(Gigabyte)-->1000MB
TB(Terabyte)-->1000GB
PB(??)-->??MB<----?  我猜的 @@ 有知晓的大能大德 能帮解惑一下 谢谢
那再下一个单位  是??

[ Last edited by alexpon on 2006-6-11 at 16:25 ]

Youth

B->KB->MB->GB->TB->PB->EB->ZB->YB...

队列中每个箭头都是×1000

[ Last edited by Youth on 2006-6-11 at 16:41 ]

alexpon

楼上Youth 版主 多谢啦
看来天文与物理计算类  的单位  还真是大呢 @@
不过  现在随便一部 HP DL 380 系列 4U 6*12 142G HDD  大概也都超过1TB吧
时代进步的脚步 可不慢呢

加油加油

Youth

现在硬盘便宜，就算是个人用的机器要上T还是比较容易的，再往前到P就困难了：）

alexpon

又要MainTain囉

16.6.2006 15:47 UTC
Due to a network renumbering of a part of the CERN network, the LHCHome servers are going to be unaccessible on next Tuesday morning, 20th of June. Access should be reestablished in the afternoon. Sorry for the inconvenience.

Surge

引用 Youth 在 2006-6-11 16:42 时的帖子:
现在硬盘便宜，就算是个人用的机器要上T还是比较容易的，再往前到P就困难了：）

如果要前进到P级，估计硬盘够呛，恐怕得换其他介质了吧。