论文标题
Alice数据处理3和在LHC上运行4
ALICE data processing for Run 3 and Run 4 at the LHC
论文作者
论文摘要
在即将到来的LHC的3和4运行期间，爱丽丝将以50 kHz的峰值PB-PB碰撞率获取数据。得益于实验的主要跟踪探测器以及新的数据处理策略的升级，这将成为可能。为了收集爱丽丝针对的精确测量所需的统计数据，将采用连续的读数。这带来了处理前所未有的数据速率的挑战。在第一级处理（FLP）节点上，来自检测器的原始数据的〜3.5 tb/s将减少到约600 GB/s，并发送到事件处理层，以进一步处理和还原至小于100 GB/s的数据，以永久存储。这个同步处理阶段将包括重建，校准和压缩程序，然后是异步处理阶段，以说明最终校准。质量控制（QC）将在所有处理阶段中强烈使用。此演讲说明了3和4中爱丽丝的处理流程，重点是同步处理的组成部分。将描述所选的软件设计。还包括数据分析框架的概述。
During the upcoming Runs 3 and 4 of the LHC, ALICE will take data at a peak Pb-Pb collision rate of 50 kHz. This will be made possible thanks to the upgrade of the main tracking detectors of the experiment, and with a new data processing strategy. In order to collect the statistics needed for the precise measurements that ALICE aims at, a continuous readout will be adopted. This brings about the challenge of handling unprecedented data rates. The ~3.5 TB/s of raw data from the detectors will be reduced to about 600 GB/s on the First Level Processing (FLP) nodes, and sent to the Event Processing layer for further processing and reduction to less than 100 GB/s of data to be stored permanently. This synchronous processing stage, which will include reconstruction, calibration and compression procedures, will be followed by an asynchronous one to account for final calibrations. Quality Control (QC) will be intensively used in all the processing stages. This talk illustrates the processing flow for ALICE in Runs 3 and 4, with emphasis on the components of the synchronous processing. The chosen software design will be described. An overview of the data analysis framework is included as well.
