Log Maintenance Sample Clauses

Log Maintenance. Logs that pertain to infrastructure changes are retained indefinitely and are kept in git and managed as code. Changes in infrastructure that are managed elsewhere (e.g. hosted DB version updates) are maintained for >90 days and user logs are stored for at least 30 days. Some logs are exported to analytics sinks and are stored with longer retention (>1 year).

Log Maintenance. To avoid that the history log becomes too large, we can archive the oldest part of it. However, we have to avoid disposing that part of the log that might still be needed for pending reconciliations. The log can be managed as follows. At each site q and for each object o, an auxiliary structure, called propagation vector PV o is kept. There is an entry in PV o for each site of the system. The q q semantics of the propagation vector is illustrated by the following invariant condi- tion: