MERCATOR OCEAN JOURNA: 
SEPTEMBER 2021 
2. MAIN ACHIEVEMENTS FROM 
2015 TO 2021 
To put things into perspective, some general figures 
showing how much the service has grown from 2015 to 
2021 are provided: 
subscribers are people registered to our service. 
In the other hand, users are subscribers that are 
actively using the service (downloading data). In 2015, 
Copernicus Marine Service had approximately 4 000 
subscribers. It now has 30 000 (Figure 3), 
- evolution of downloaded data volume (Figure 4) skyrocketed 
starting from 2018. This shows that with DUs performance 
enhancement, usage of the service has changed. Therefore, 
‚t had to be reflected in the Data Portal 
JUs avallability. As users are interacting with the Data 
Portal, they experience indirectly the outages at DU level. 
For instance, DU 4 (Figure 5) knew an overload episode 
due to the release of a new product and was not able to 
-ecover to Marine Service standards for a few months. 
High availability and scalability 
The first main mission of the CIS has been accomplished: the 
avallability of the services has been kept high during all the 
period and has been improving with time. The 97% avallability 
target has always been fulfilled for the authentication services, 
and fulfilled with only 2 exceptions for the 2 other services. 
Behind the scenes, redundancy and automation have been 
key to having a reactive system that prevents most of the 
downtime with minimum human Intervention. 
Number of new Subscribers & Users over time 
18 9893 
Wesures 
jubscribers 
karc 
20.008 
5 
A 
igure 3: Evolution of users over time since MyOcean 1 
16(*) 
3000 
7500 
2000 
1500 
DOC 
O0 
} _ 
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 
Volume downloaded (TB) 
„re &: Evolution of downloaded data volume over time since MvOcean 2.