TIGGE数据接收问题分析与解决

2010年1月欧洲中期天气预报中心（ECMWF）开始提供高分辨率产品，中国气象局TIGGE （THORPEX Interactive Grand Global Ensemble）数据接收完整性受到较大影响，数据丢失量大，针对此问题，对数据接收环节进行了逐一分析，发现数据共享软件（全球气象数据共享系统）使用的TCP传输协议在高带宽、高时延网络环境下存在性能瓶颈，制约了当前网络吞吐量的提高，不能满足每天大数据量的传输要求。通过对TIGGE系统的TCP接收窗口大小进行调整，提高了TCP协议性能和当前网络吞吐量。调整后，中国气象局数据接收情况与全球其他业务中心基本一致，实现了对全球各中心数据的完整接收。

Analysis and Solution of Problems Specific to TIGGE Data Receiving

The European Center for Medium Range Weather Forecasts (ECMWF) has begun to offer high resolution products since January 2010, which affects the integrity of TIGGE data receiving in the China Meteorological Administration, causing significant data loss. The various factors affecting data receiving are analyzed, respectively. It is found that using the TCP transport protocol for data sharing has a bottleneck in application in the present network environment of high bandwidth and high time delay, which therefore restrains the network throughout and cannot satisfy huge data transmission requirements. The performance of TCP protocol and the throughput of current network are improved by adjusting the size of the TCP receiving window of the TIGGE system. Through adjusting, the situation of data receiving in the China Meteorological Administration is consistent with other global centers, realizing the integrity of data receiving of all global centers.