Im purchasing two new servers to replace our current Clearcase infrastructure and was wondering has anyone got any suggestions on how to do this. Here is a quick overview of what I need to do:
Primary server has a filesystem with active VOBs. These are open files, and range from a few hundred megs to about 80GB.
I want the backup server to have a mirrored copy of this data (which wouldn't be open, or active files), so there would be no need to lock them (like we do in our current environment) so that these can be tarred up, and then archived to tape. Or even possibly lock these on the secondary server (may be needed if it is realtime sync), tarred unlocked, and then updated.
Preferably I would like to have a realtime mirror. However this may not be possible. I have done some reading on DRDB but from what I surmise, the data is not accessible on the second server until the primary goes offline.
The data will never need to be accessed from the secondary server with the exception of tarring the files. If the primary goes down, this data probably still wouldn't be used, as we would recover the data to the previous night's backup, and then resync from a site replica, which at worst would be out by 6 minutes.
We cannot use the site replica to backup, as to restore involves quite a lot of changing the configuration on the site, as you are restoring and would increase restore time dramatically.
I also thought about running an rsync, as the data doesn't nessisarily need to be a mirror copy. While a mirror copy would be nice, an rsync before the tarring of files would be enough. However im not sure of the does and donts of using rsyn on open files, and also due to the fact the largest files (70Gb) would probably have changed during its own rsync.
Im wondering if anyone has any thoughts on this? Our will I have to stay with our current method of locking the files on the Primary, tarring, copying them to the backup and then off to archive.
Any suggestions are more than welcome.
Regards
B
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