the rotationPeriod not enough to full fill hourly/daily rotation

[zhenchuan]

if i want to rotate logs hourly, just using roatationPeriod will cause unnecessary messages in the log file,
eg. 19:57 + 10m (expected 20:00) .

how about if i add a force_rotate_ granularity property to support this ?

[metacret]

So, you want to rotate files in every hour such as 10AM, 11AM, 12PM, ... even though you start the server on 9:30AM, did I understand correctly? If so, it makes sense.

Instead of force_rotate_granularity, if 'rotationPeriod' is hourly/daily/weekly/monthly, we can change the behavior.

nextRotation = new DateTime().plus(rotationPeriod).getMillis(); of LocalFileSink is the key of this behavior.

[zhenchuan]

yes,you are right, but daily(even hourly) logs will be very big files,the rotationPeriod will also be useful .