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The RotatingFileHandler class supports rotation of disk log files.
| filename[, mode[, maxBytes[, backupCount]]]) |
'a' is used. By default, the
file grows indefinitely. You can use the maxBytes and
backupCount values to allow the file to rollover at a
predetermined size. When the size is about to be exceeded, the file is
closed and a new file opened for output, transparently to the
caller. Rollover occurs whenever the current log file is nearly
maxBytes in length. If backupCount is >= 1, the system
will successively create new files with the same pathname as the base
file, but with extensions ".1", ".2" etc. appended to it. For example,
with a backupCount of 5 and a base file name of "app.log", you would
get "app.log", "app.log.1", "app.log.2", ... through to
"app.log.5". When the last file reaches its size limit, the logging
reverts to "app.log" which is truncated to zero length. If
maxBytes is zero, rollover never occurs.
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