File redirection

[arksjd]

Hi All

I am a Newbie to Linux.
I have a folder LOGS under the path /d01/App1/LOGS. Since my application generates lots of log files under this LOGS directory , I have been asked to move this to the different path which is in a different file system /d00/LOGS.

My application is configured in such a way that the log files will be written only under this path /d01/App1/LOGS. All I have to do is to re direct this path to /d00/LOGS.
So when my application is trying to write a log file under this /d01/App1/LOGS path , all it has to do is not write in that path instead it has to write in /d00/LOGS path.


I tried to use symbolic soft links but could not succeed in achieving the same.

Would appreciate the help on this.

Thanks
Rajesh.

[Irithori]

Can this application be configured by a conf file to use another log directory or is the path hardcoded to /d01/App1/LOGS ?
If it would be hardcoded: File a ticket for the responsible developer.

If I understand correctly, the server is already having problems, as you have been asked to move the logs. Disk space or performance issues maybe?

Two possible adhoc fixes:
a) introduce and configure logrotate.
The tool logrotate can make sure a logfile does not get bigger than X bytes, and keeps Y generations, optionally gzipping older files.
It will drop logfiles, that fall out of that rotation.

b) if you do need all the logs and there is enough space on /d00/LOGS, then you could do a "bind mount" from /d00/LOGS to /d01/App1/LOGS

man mount

The workflow for that quick fix would be:
- Shut down the application
- copy files from /d01/App1/LOGS to /d00/LOGS
- if the copy was succesful, delete them from /d01/App1/LOGS/
- define the bind mount in /etc/fstab
- mount /d01/App1/LOGS/
- start the application


The clean way:
- configure the application to use the new log path
- consider the use of logrotate

[druidmatrix]

If the path is hard coded all over the app, and /d00 and /d01 are different file systems, then you are in deep doo-doo unless you have root access to `mount` as Irithori described.

[Cabhan]

I am curious as to why symlinks do not work. You can easily make /d01/App1/LOGS actually point to /d00/LOGS. Symlinks do not care about linking to a different filesystem.

ln -s /d00/LOGS /d01/App1/LOGS

When you run this, what error are you getting?