FantasticSearch

Technical architecture and ways of operating SIS SIS shall be composed of: a central system (Central SIS) composed of: a technical support function (‘CS-SIS’) containing a database, (the ‘SIS database’), and including a backup CS-SIS, a uniform national interface (‘NI-SIS’); a national system (N.SIS) in each of the Member States, consisting of the national data systems which communicate with Central SIS, including at least one national or shared backup N.SIS; a communication infrastructure between CS-SIS, backup CS-SIS and NI-SIS (‘the Communication Infrastructure’) that provides an encrypted virtual network dedicated to SIS data and the exchange of data between SIRENE Bureaux, as referred to in Article 7(2); and a secure communication infrastructure between CS-SIS and the central infrastructures of the ESP, the shared BMS and the MID.

An N.SIS as referred to in point (b) may contain a data file (a ‘national copy’) containing a complete or partial copy of the SIS database. Two or more Member States may establish in one of their N.SIS a shared copy which may be used jointly by those Member States. Such shared copy shall be considered as the national copy of each of those Member States. A shared backup N.SIS as referred to in point (b) may be used jointly by two or more Member States. In such cases, the shared backup N.SIS shall be considered as the backup N.SIS of each of those Member States. The N.SIS and its backup may be used simultaneously to ensure uninterrupted availability to end-users. Member States intending to establish a shared copy or shared backup N.SIS to be used jointly shall agree their respective responsibilities in writing. They shall notify their arrangement to the Commission.

The Communication Infrastructure shall support and contribute to ensuring the uninterrupted availability of SIS. It shall include redundant and separated paths for the connections between CS-SIS and the backup CS-SIS and shall also include redundant and separated paths for the connections between each SIS national network access point and CS-SIS and backup CS-SIS. CS-SIS shall provide the services necessary for the entry and processing of SIS data, including searches in the SIS database. For the Member States which use a national or shared copy, CS-SIS shall: provide online updates for the national copies; ensure synchronisation of and consistency between the national copies and the SIS database; and provide the operation for initialisation and restoration of the national copies.