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Diffstat (limited to 'Doc/library')
| -rw-r--r-- | Doc/library/logging.rst | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Doc/library/logging.rst b/Doc/library/logging.rst index 2030d98..5c8599a 100644 --- a/Doc/library/logging.rst +++ b/Doc/library/logging.rst @@ -1337,6 +1337,22 @@ When this script is run, the output should look something like this:: The :class:`LoggerAdapter` class was not present in previous versions. +.. _multiple-processes: + +Logging to a single file from multiple processes +------------------------------------------------ + +Although logging is thread-safe, and logging to a single file from multiple +threads in a single process *is* supported, logging to a single file from +*multiple processes* is *not* supported, because there is no standard way to +serialize access to a single file across multiple processes in Python. If you +need to log to a single file from multiple processes, the best way of doing +this is to have all the processes log to a :class:`SocketHandler`, and have a +separate process which implements a socket server which reads from the socket +and logs to file. (If you prefer, you can dedicate one thread in one of the +existing processes to perform this function.) The following section documents +this approach in more detail and includes a working socket receiver which can +be used as a starting point for you to adapt in your own applications. .. _network-logging: |