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TDL uses AWS Snapshot service for backups and maintains two weeks maintains 30 days of daily disk snapshots and 1 monthly disk snapshot, kept in Amazon’s S3 storage for at least keeps monthly snapshots for one year.

TDL also provide optional long-term distributed digital preservation storage. (See Digital Preservation section and DSpace to DuraCloud in TDL DSpaces Digital Preservation of DSpace Content for more information on long-term digital preservation of DSpace materials.)

Security-focused monitoring

• Scheduled, regular Regular automated updates and patch deployment for the hosted operating system and system applications on TDL servers.

• Continual monitoring for DSpace service availability, with notifications sent to administrators in the event that the service is experiencing an outage. Outages, whether due to system or application failure or external attack are resolved as quickly as possible by TDL technical staff.

• On-going review of known exploits which may affect DSpace hosting followed, as needed, by manual patching and updates to limit exposure.

• Monitoring for notifications from customers of service failures, outages, or issues via the ZenDesk support system. Issue tickets are resolved by technical staff.

• Monitoring of the DSpace technical community discussions for discovered security vulnerabilities. Discoveries of a security vulnerability are followed by integration of the fix into the deployed service.

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