The BaBar Experiment collected around 20 TB of data during its first 6 months of running.Now,after 18 months,data size exceeds 300 TB,and according to prognosis,it is a small fraction of the size of data coming in the...The BaBar Experiment collected around 20 TB of data during its first 6 months of running.Now,after 18 months,data size exceeds 300 TB,and according to prognosis,it is a small fraction of the size of data coming in the next few months,In order to keep up with the data significant effort was put into tuning the database system,It led to great performance improvements,as well as to inevitable system expansion-450 simultaneous processing nodes alone used for data reconstruction.It is believed,that further growth beyond 600 nodes will happen soon.In such an environment,many complex operations are executed simultaneously on hundreds of machines,putting a huge load on data servers and increasing network traffic Introducing two CORBA servers halved startup time,and dramatically offloaded database servers:data servers as well as lock servers The paper describes details of design and implementation of two servers recently in troduced in the Babar system:conditions OID server and Clustering Server,The first experience of using these servers is discussed.A discussion on a Collection Server for data analysis,currently being designed is included.展开更多
Y2000-62544-180 0104531多个反射镜位置的并行存取的少量加权的安全性=Light weight security for parallel to multiple mirror-sites[会,英]/Yener,B.//Proceedings of the Fifth IEEESymposium on Computer and Communications.—18...Y2000-62544-180 0104531多个反射镜位置的并行存取的少量加权的安全性=Light weight security for parallel to multiple mirror-sites[会,英]/Yener,B.//Proceedings of the Fifth IEEESymposium on Computer and Communications.—180～185(HC)本文研究了新文件分配和存取控制规约,以便降低安全性经营费用,此规约基于组合技术以类似于FEC 码的通路将文件插入简单构件,这样至少必须用K 个构件组成文件,但是与过去的方法相比,每个 K构件不一定是充足的,利用这些特性,文中描述了使服务经营费用最小的安全分配和存取规约。展开更多
文摘The BaBar Experiment collected around 20 TB of data during its first 6 months of running.Now,after 18 months,data size exceeds 300 TB,and according to prognosis,it is a small fraction of the size of data coming in the next few months,In order to keep up with the data significant effort was put into tuning the database system,It led to great performance improvements,as well as to inevitable system expansion-450 simultaneous processing nodes alone used for data reconstruction.It is believed,that further growth beyond 600 nodes will happen soon.In such an environment,many complex operations are executed simultaneously on hundreds of machines,putting a huge load on data servers and increasing network traffic Introducing two CORBA servers halved startup time,and dramatically offloaded database servers:data servers as well as lock servers The paper describes details of design and implementation of two servers recently in troduced in the Babar system:conditions OID server and Clustering Server,The first experience of using these servers is discussed.A discussion on a Collection Server for data analysis,currently being designed is included.
文摘Y2000-62544-180 0104531多个反射镜位置的并行存取的少量加权的安全性=Light weight security for parallel to multiple mirror-sites[会,英]/Yener,B.//Proceedings of the Fifth IEEESymposium on Computer and Communications.—180～185(HC)本文研究了新文件分配和存取控制规约,以便降低安全性经营费用,此规约基于组合技术以类似于FEC 码的通路将文件插入简单构件,这样至少必须用K 个构件组成文件,但是与过去的方法相比,每个 K构件不一定是充足的,利用这些特性,文中描述了使服务经营费用最小的安全分配和存取规约。
