Tough question.  People have their own preferences for particular file
systems.  I have used ext2, ext3, ext4, xfs, & btrfs over the years with
BackupPC.  In the end I prefer to use BTRFS.  I like the
subvolume/snapshot capabilities and it works fabulous on ARM devices. 

XFS has been very stable.  It's still running on a legacy CentOS system
I admin with 20TB of storage.  I recently converted to 4.x and it
continues to plug away.  Won't be changed until the system is retired. 

So from my experience there are a number of very good file systems
available; I chose one that provides capabilities I desire. 

As to performance - my biggest challenge is always the network.  It can
never be fast enough! 

Cheers! 

mph 

On 2017-04-18 13:22, Michael McGregor wrote:

> Hello, 
> 
> I'm at the point of running the actual installer for BackupPC 4.1.1 and I 
> realized I need to configure my backupPC volume on my filesystem! I have a 
> dedicated 12 TB RAID 6 for BackupPC, but I haven't formatted it yet for use. 
> So my question is, what file system would be best for BackupPC? Both in 
> stability and performance? 
> 
> I am running on CentOS 7.3.1611. 
> 
> Thanks! 
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