GSC Sentinel-2 PDGS SRD - emits - ESA

GSC Sentinel-2 PDGS SRD
Issue 1 Revision 2 (draft) - 25.07.2010
GMES-GSEG-EOPG-RD-09-0028
page 103 of 204
S2-PDGS-AI-295
The PDGS/AI function shall be configured for data-retention according to the operational
configuration for retention throughout the PDGS archives outlined in the [OCD].
S2-PDGS-AI-300
The PDGS/AI function shall be configured in two redundant PACs for the systematic copy
of all archived L0/1B/1C data to long-term storage.
S2-PDGS-AI-305
The PDGS/AI function shall supply status information over all its processes and resources
(i.e. log information, disk volumes usage, alarms, etc.) in real-time via the M&C function.
S2-PDGS-AI-310
The PDGS/AI function shall generate a critical alert to the operator whenever the
remaining on-line storage space falls below a configurable threshold.
5.7.4 RAMS REQUIREMENTS
S2-PDGS-AI-315
The PDGS/AI function shall ensure nominal availability unattended for better than 99.7%
of the time computed over one month time window and assuming a degradation of such
figure for no more than one day.
S2-PDGS-AI-320
The PDGS/AI function shall provide the required autonomous data reallocation, reindexing,
etc. capabilities that ensure no degradation on the performance requirements
along the mission time life.
S2-PDGS-AI-325
The archive-to-archive circulation operations and retention management operations shall
ensure consistency of the archive hierarchy and completeness of the circulation, move or
clean-up operations such that:
PDIs are circulated, moved or removed together in complete form of their granularity
(e.g. MSI granules are always comprehensive of all spectral bands, associated
metadata, etc);
datastrip-level or orbit-level PDIs are removed only after all related lower level PDIs
are removed;
low-level PDIs are never moved alone without their cross-related upper-level PDIs;
etc
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