collect more stats of
- how long FS API calls are taking
- what is going wrong
- Duration of rename(), delete() other common API Calls.
- openFile: how long the open operation is taking, split of open and openfile
- time to initialize FS instance (maybe better in FileSystem.cache?)
- create: Time to complete the create checks
- finishedWrite: time to execute finishedWrite operations (which may include bulk deletes)
Failure tracking: what failures are we seeing as counters
Interrupts, connections, auth failures:
This would be done in S3ARetryPolicy with an IOStatisticsStore passed in.