MERCATOR OCEAN JOURNA: 
SEPTEMBER 2021 
1. CENTRAL INFORMATION SYSTEM 
OVERVIEW 
The historical CIS was built with as much on-the-shelf, 
open-source software as possible, that proved their quality 
ver time. It has been a very effective way to deploy the 
‘oundation of a secure, maintained, efficient and robust 
system. Apache Solr, CAS, LDAP (Lightweight Directory 
Access Protocol), Geoserver, Geonetwork and Joomla! are 
still popular solutions today but they require talloring 
some parts of the system to completely fulfill Copernicus 
Marine Service’s needs. Two areas demand a particular 
attention: the technical interfaces with DU Application 
SLR. 
- 1 
VAN 
TeTelgalıc 
0] 
Programming Interfaces (APls, red line in Figure 2) and the 
web user interfaces (Viewer + Joomla! in Figure 2). 
Machine-to-machine interfaces do not evolve quickly but 
they require code adaptation to match their performance 
constraints. For instance, if the DU API cannot provide 
more than 1 GB of data per request, the web interface 
should not let users request more than 1 GB of data. When 
the Copernicus Marine Service Phase 2 DUs came into 
operation, It provided a big improvement in performance at 
various levels and it provided new ways of delivering data 
On the other hand, the web User Interface (Ul) should be 
updated more often. Indeed, as industry standards are 
changing rapidly, users’ first Impression may be to stumble 
upon an old website. Initially, this web development activity 
was not considered as critical as It is today and has 
changed significantly during the past 6 years. 
> 
WC 
SOLR 
ww’ 2 e- a { 
pc LET 
„CE 
on 
>. 
Aal LE 
AL 
UWbya® 
Interfaces with DU 
A 
7 Authentication services 
7-7 Metadata services 
z= Simplified general architecture of the CIS in 2015