American Megatrends StorTrends 2200 User Manual page 265

AMI StorTrends innovatively combines its low-latency snapshot technology with I/O
journaling to offer most efficient CDT repository. Journal files can be configured from up
to eight logical drives of any sizes to serve as the event-addressable-storage. To offer the
utmost in performance, StorTrends allows configuring separate journal files for different
consistency groups. In a typical environment where an average of 10GB production data
is changed or generated per hour, a journal file of 1TB can hold four days worth of
continuous chronological data. In addition, with eight levels of scheduled snapshots and
up to 2000 snapshots per volume StorTrends can deliver any historic data across a very
wide time spectrum.
Figure 3 above shows Continuous Data Capturing and the process of time-stamping I/Os
and events in the Journal File to form the basis of Time addressable(TAS) and Event
Addressable(EAS) storage.
Appendix I : Continuous Data Technology 251