2022-04-29 WMO Secretariat & GISC Beijing Meeting notes

1.Round table introduction

ALL

• Enrico welcomes all the participants. This is a meeting to understand the willingess of GISC Beijng for its role in WIS2 Global Services. It is a non-binding agreement/decision.

• All participants make a brief introduction.

2. WIS2 Architecture

Hassan

3. Discussion

ALL

• Enrico: In WIS2 architecture, GISCs are not obliged to run all Global Services (Global Cache/Global Broker/Global Discovery Catalogue/Global Monitoring). So far, DWD offered to run Global Cache; Met France & Met Office: Global Broker; Canada: Catalogue.

• Xinqiang: We have some experience in real time data transmission and rabbitMQ. We are interested in running Global Broker and Global Cache.

• Enrico: Specification for Broker/Cache is not yet ready. Discussion on Topic Structure is still ongoing. More meetings between GISCs willing to run Broker/Cache will be held, such as the meeting between GISC Beijng and GISC Offenbach will be coordinated to discuss the technical issues.

• Qing DAI: we are willing to run the Global Broker and Global Cache.

• Peng WANG:

  • Is it possible to run both Cache and Broker?

    • (Enrico) YES, building broker and cache is not the difficult part, the most challenging part is that brokers/caches to talk to each other.

  • Is WIS2 in a box is requried?

    • (Enrico) No, it is a reference implementation.

  • Who will implement as the global sensor center?

    • (Enrico) Sensor center is not in the wis2 in a box, it is not a function of Cache, it can be built anywhere. It is used for data analysis from the users' point of view, such as how much data they receive.

  • How about the latency in AoR?

    • (Enrico) NC can be connected to several Global Caches, uploading data to different Global Caches. Global Caches need to synchronize by themselves.

  • How about synchronization?

    • (Enrico) Technical details on Cache synchronization needs to be discussed among GISCs willing to play such a role.

  • Links between GC and NC, for some members, internet connection is a challenge

    • (Enrico) One of the WIS2.0 principle is to use Internet as much possible, not to use dedicated line

• Qing DAI: How do we help AoR transite from GTS to WIS2.0, for thoses NCs with poor Internet access, it could be very difficult to migrate and connect to WIS2.0

• Peiliang: I am very pleased to learn that GISC Beijing to take the role of Global Broker and Global Cache. GISC Beijing has been doing a good job. It it important to figure out the future role that GISC Beijing will play. We will also seek CMA authority for support.