确定SSD对LHC第2层硬件配置的适用性
Establishing Applicability of SSDs to LHC Tier-2 Hardware Configuration
摘要：
在高随机I/O环境中，固态硬盘技术正日益取代高速硬盘作为存储技术。在典型的LHC Tier-2中有几个潜在的I/O绑定服务-在后端，随着多核架构的趋势继续，运行许多单线程作业的工作节点和同时提供许多文件的存储节点都可以表现出I/O有限的效率。我们估计负担得起的SSD的工作节点的上下文中的有效性，在一个大型的第2层生产设置使用低级别的工具和真正的LHC I/O密集型数据分析工作比较和对比高性能旋转磁盘的解决方案。我们根据每个解决方案的性价比指标来考虑其适用性，同时关注第2层配置和升级所面临的实际问题
英文摘要：
Solid State Disk technologies are increasingly replacing high-speed hard disks as the storage technology in high-random-I/O environments. There are several potentially I/O bound services within the typical LHC Tier-2 - in the back-end, with the trend towards many-core architectures continuing, worker nodes running many single-threaded jobs and storage nodes delivering many simultaneous files can both exhibit I/O limited efficiency. We estimate the effectiveness of affordable SSDs in the context of worker nodes, on a large Tier-2 production setup using both low level tools and real LHC I/O intensive data analysis jobs comparing and contrasting with high performance spinning disk based solutions. We consider the applicability of each solution in the context of its price/performance metrics, with an eye on the pragmatic issues facing Tier-2 provision and upgrades
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