Renaming the logs in Unix without shutting the server

[Chak Radar]

How can i rename the big log files in Unix environment without shutting down the applicatio server.Here iam using websphere.
Can anyone help me out?

[Leslie Chaim]

Have you tried the mv command?

[Chak Radar]

Leslie
In the real time environment i have few server instances within an websphere application server.
This is a production environment and i cannot shut down the server to take a back up of existing logs.Again when the server is started the application will create a new log file with 0 bytes.My question is CAN i take a back up of the log files with out shutting down the server.
That is with out an outage to the production environment can i take a back up of huge logs .The huge logs may cause slowness in accessing the application.I think iam clear in my question this time.
Thanks
Chak Radar

[Leslie Chaim]

Chak,
It really does not matter which application is writing to the log file.
I understand your problem as follows:
Q. I have a process which writes to a log file which grows very rapidly. How do I truncate the file without shutting down my process.
A. Simply clubber the file as in (from the shell):

> your_big_log_file

Q. Will I lose the data from the log.
A. Yes! If you want to preserve it you can do something like this:

cat your_big_log_file >> archive_big_log_file
> your_big_log_file

I hope this is helpful. Here's some more
Cheers,
Leslie
[ May 06, 2003: Message edited by: Leslie Chaim ]