2014-07-07 10:16 PM
Remember too that you may need to refer to archived logs (snapmirror.0, snapmirror.1, etc)
We recently put together some similar sort of analysis via Linux scripting and ran into that problem, where we could only see from 12:00 AM onwards on the current day (based on daily log rotation).
I can tell you though that there's some very good/useful info in the logs, enough to get the information you need.
2014-07-07 10:21 PM
There are a couple of scripts (SnapMirror log parser, SnapMirror log summary) on toolchest. They may need some tweaking, but could serve as starting point to avoid reimplementing it from scratch.