Good day,

I have the following task.

			There are several server applications running on different hosts (Solaris OS) in one subnet.
			

			Each of them writes logs locally using log4j RollingFileAppender.
			

			There is a task to create centralized logs storage of all these logs.
		

There are 2 main solutions that came to my mind.

1. Mount logs directory by NFS and write logs there.

2. Reconfigure log4j to send logs to syslogd

			I am interested in 1st option.
			

			But some questions appear.
			

			How to provide reliability in case if nfs brakes (timeout or network issues)
		

There are 2 points:

1. All applications should not be affected by nfs crash.

2. Logs should not be lost in case of nfs crash.

To provide this i see variant:

-Write logs in 2 threads (locally and to nfs) and then periodically synchronize them. (Question how? )

			-Alternate failover way to save logs
			

			(e.g. in case of nfs crash write them locally and then copy them to nfs) (Question how remains =)) )