Re: [CentOS] Is ext4 safe for a production server?

John R Pierce wrote:

Mark Caudill wrote:

...

Wait, just to be clear, are you saying that all use of LVM is a bad idea unless on hardware RAID? That's bad it if it's true since it seems to me that most modern distros like to use LVM by default. Am I missing something?

if LVM is ignoring write barriers, its not a good idea on hardware raid, either, at least not for applications that rely on committed writes, like transactional databases.

Write barriers are for the case of getting a data guarantee with hard disks connected via sata/scsi that have their write caches enabled.

Hardware raid + bbu cache change that game. LVM on hardware raid is safe due to the bbu cache (with write caches on connected hard drives set to off)