Lets say my mysql replication is enabled for long time, and the server has been quite busy, so new bin log files get created every few seconds. So in a few months, it is possible for latest bin log file to have name "mysql-bin.999999". Does the next file again become "mysql-bin.000001"?
The question is important from check pointing view, since I'm using the replication to stream changes of the DB. If the name starts back from 000001, then I cannot assume that file names would be always incrementing, so if older record are received, then it cannot be ignored just because file name is numerically smaller.