Retention period metrics in Global Monitors

[6a6d74]

Set retention period for Global Monitors to be a minimum of 50GB to allow for gathering of performance statistics for KPIs.

[6a6d74]

ET-W2IT meeting 8-Dec-2025

Morocco already implemented 50GB/180-day retention.

China log files are currently 20GB. Will check if a maximum size is configured, but no problem with storing 50GB.

180-day retention is important for long-term monitoring. 50GB size limit is to prevent the logs becoming unmanageably large.

Request Global Monitors to provide comment in the issue on feasibility.

Once the Global Monitor operators comment on feasibility, we will update the Guide (technical considerations for Global Monitors) to include this.

ACTIONS

• ACTION (@elgarraichemseddine) > coordinate with China to ensure that log retention size and duration are consistent.
• ACTION (@elgarraichemseddine, @shirley-xuelei) > Comment on feasibility of the 50GB/180-day retention.

[guwj0609]

GM CMA log storage currently operates at approximately 23GB over 180 days. The existing system is configured with a maximum file size of 256MB and a maximum of 1 million lines per log file. The underlying storage infrastructure and management processes already support the 180-day retention period.

[6a6d74]

ET-W2IT meeting 5-Jan-2026

Based on feedback from CMA, the 50GB/180-day retention period requirement is feasible.

• ACTION (@elgarraichemseddine) Update the Technical Considerations section of the WIS2 Guide to add this requirement about retention periods for logs, metrics, and statistics.

[elgarraichemseddine]

Proposed Guide Text : "Global Monitors SHALL retain logs, metrics, and derived statistics for a minimum period of 180 days to support long-term monitoring, trend analysis, and KPI evaluation. The log retention system SHALL be configured to allow a minimum total storage capacity of 50 GB, ensuring sufficient historical data while preventing log files from becoming unmanageably large through appropriate rotation and size limits. Metrics and statistics retained over this period SHALL be accessible for performance analysis and operational reporting. Global Monitor operators SHOULD implement log and metric rotation and archival mechanisms aligned with their infrastructure capabilities, provided that the minimum retention duration and capacity requirements are met."

[6a6d74]

ET-W2IT meeting 19-Jan-2026

@elgarraichemseddine introduced his proposed text.
@golfvert suggested changing SHALL and SHOULD to be consistent with how the rest of the Guide is written (e.g., “will”).

• ACTION (@elgarraichemseddine) Modify the proposed text as per suggestion and submit a PR to the WIS2 Guide, requesting @golfvert as approver.

[elgarraichemseddine]

Dear @golfvert,
Could you please review this comment?

Global Monitors will retain logs, metrics, and derived statistics for a minimum period of 180 days to support long-term monitoring, trend analysis, and KPI evaluation.

The log retention system will be configured to provide a minimum total storage capacity of 50 GB, ensuring sufficient historical data while preventing log files from becoming unmanageably large through appropriate rotation and size limits.

Metrics and statistics retained during this period will be accessible for performance analysis and operational reporting.

Global Monitor operators will implement log and metric rotation and archival mechanisms aligned with their infrastructure capabilities, provided that the minimum retention duration and storage capacity requirements are met.

[golfvert]

Consider that the 180 days and the 50GB of disc are additional information to:

2.7.6 Global Monitor
2.7.6.1 Technical considerations

• WIS standardizes how system performance and data availability metrics are published from WIS2 Nodes and Global Services.
• For each type of Global Service, a set of standard metrics has been defined. Global Services will implement and provide an endpoint for those metrics to be scraped by the Global Monitor.
• The Global Monitor will collect metrics as defined in the OpenMetrics standard.
• The Global Monitor will monitor the "health" (that is, the performance) of components at NCs/DCPCs, as well as Global Services.
• The Global Monitor will provide a web-based dashboard that displays the WIS2 system performance and data availability.

additional lines here

• As a convention, the Global Monitor centre-id will be tld-{centre-name}-global-monitor.
• The main task of the Global Monitor will be to regularly query the metrics provided by the relevant WIS2 entities, aggregate and process the data and then provide the results to the end user in a suitable presentation.

I would simply add:

• The Global Monitor will retain logs, metrics, and derived statistics for a minimum period of 180 days to support long-term monitoring, trend analysis, and KPI evaluation
• The Global Monitor will allocate a minimum of 50GB of storage for logs, metrics and derived statistics

[6a6d74]

ET-W2IT meeting 2-Feb-2026

@golfvert and @elgarraichemseddine confirm that the text provided here is good, inserting the two new lines after the 5th bullet point in section 2.7.6.1. [Global Monitor] Technical Considerations.

• ACTION (@elgarraichemseddine) create a PR for inclusion of this change into the WIS2 Guide (branch: FT2026-1).

[6a6d74]

ET-W2IT meeting 16-Feb-2026

No update.