CSTR Service Level

• Web-based bibliographic search
• Web-based display of thumbnail images of pages
• Web-based retrieval of full-sized screen resolution page images
• Web-based retrieval of PostScript format printable documents
• Web-based link to order printed copy of report from Document Services
• FTP based retrieval of pages
• Interoperability with NCSTRL's federated search through Dienst protocol
• Each report has an eponymous Handle in the Handle System pointing to it
• (Future) Acquisition of new reports from AI & LCS as they become available

• Reliable preservation of contents of the collection in its exact current form i.e. no planned migration to new software
• Usual hours of service operation are 24x7 via web and FTP.
• Continuous automated monitoring of Web services with timely reporting to staff via email
• Serious problems will get a response the same day during workdays, probably within 12 hours of whatever hour of the day the problem starts. i.e. If the user visible services go down it is NOT required that someone be paged to bring them up.
• Single disk drive failures are corrected within one business day.
• Double disk drive failures are corrected within three business days.
• Daily incremental backups (to DLT media)
• Weekly full backups (to DLT media)
• Tapes recycled after one month
• One set of full-dump tapes rotated offsite.
• Periodic archival snapshot (At least once a year)

The dynamics of the collection is frequent read, infrequent modification. The dynamics of the modification is primarily add, and rare change. So a conventional computer backup regimen may not be the perfect fit. Replication to another system may be appropriate, with the backup regimine changing to:

• Daily journal of additions to collection (via network to another site)
• Monthly full backup to DLT media, previous monthly backup moved off-site and daily logs older than 90 days discarded
• Annual off-site copy retained permanently, all others recycled after one year.

Recovery consists of:

• Reload latest readable full backup
• Redo additions from daily journal since that backup