- Regulated information—such as privacy- and health-related information, and sometimes financial information—somehow got into your telemetry systems and needs to be removed before your organization has to notify customers and users of the breach (redaction). I call information like this toxic data because information of these kinds require special handling, and there are severe penalties for getting it wrong.
- Upgrading a telemetry storage system often means that backups or databases need to be reformatted to ensure restorability, or replacing one telemetry system with another means having to import your old telemetry into the new system (reprocessing).
This chapter is about handling both of these concerns, which certainly can happen at the same time! When upgrading/replacing your storage, you have a great opportunity to redact things you don’t want in your telemetry systems. Although most of what I talk about in this chapter focuses on toxic-information cleanup—it is the more complicated problem—reprocessing matters as much for long-term maintenance of telemetry systems.